Temat: Ni coating - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Microstructure and Properties of Ni and Ni/Al2O3 Coatings Electrodeposited at Various Current Densities
Autorzy:: Góral, A.
Berent, K.
Nowak, M.
Kania, B.
Powiązania:: https://bibliotekanauki.pl/articles/958217.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Ni coating
Ni/Al2O3 composite coatings
microstructure
corrosion resistance
Opis:: The study presents investigations of an influence of various direct current densities on microstructure, residual stresses, texture, microhardness and corrosion resistance of the nickel coatings electrodeposited from modified Watt’s baths. The properties of obtained coatings were compared to the nano-crystalline composite Ni/Al2O3 coatings prepared under the same plating conditions. The similarities and differences of the obtained coatings microstructures visible on both their surfaces and cross sections and determined properties were presented. The differences in the growth character of the Ni matrix and in the microstructural properties were observed. All electrodeposited Ni and Ni/Al2O3 coatings were compact and well adhering to the steel substrates. The thickness and the microhardness of the Ni and Ni/Al2O3 deposits increased significantly with the current density in the range 2 - 6 A/dm2. Residual stresses are tensile and they reduced as the current density increased. The composite coatings revealed better protection from the corrosion of steel substrate than pure nickel in solution 1 M NaCl.
Źródło:: Archives of Metallurgy and Materials; 2016, 61, 1; 55-60
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Effect of burnishing on surface texture of Ni - Al plasma sprayed coatings
Autorzy:: Starosta, R.
Powiązania:: https://bibliotekanauki.pl/articles/247985.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: plasma spraying
burnishing
Ni-Al coating
torque pump
Opis:: The purpose of this study was the selection of roller- burnishing parameters of surface Ni-Al coatings obtained by "PN 120" plasma torch. Coatings with low surface roughness could be applied as layers increase the service life of torque pumps shaft used on vessels in the sea water systems. After turning, the average surface roughness of plasma sprayed Ni-5% Al coatings was Ra = 0.77 mi m. Their average hardness was equal to the 253 HV 2. It was comparable to the hardness of flame sprayed Ni-Al coatings after the burnishing. Before machining, plasma sprayed alloy coatings were characterized by hardness 206 HV 2. After pre-treatment, plasma sprayed Ni-Al coatings were burnishing. Burnishing parameters were as follows: Vn=28.26 m/min, Fn=1100N, fn=0,08m/rev. Burnishing reduces the surface roughness of coatings as compared to machining. The arithmetical mean deviation of the assessed profile of machined coatings was 0.78 mi m. After the plastic working, the Ra parameter was reduced to a value of 0.28 mi m. Total height of profile of machined coatings was only 2.63 mim. After burnishing, the value of Wt decreased by 0.16 mi m, to the value of 2.47 mi m. Studies burnished surface topography of coatings of Ni-5% Al overlaid by "PN 120" torch revealed the presence of defects stereometric structure. There is the folding. These folding are arranged in the direction of peripheral velocity vector. The observed high folding on the surface of alloy coatings sprayed by plasmatron were lower from the same geometric structure defects on the surface of coatings obtained by flame spraying methods. This follows from the fact that the plasma coating, after turning, characterized by higher hardness of the sprayed coating obtained by and "Roto-Teck 80" method. Thus, exhibit a lower propensity for plastic deformation. After plastic working of plasma coatings, decrease of parameters of the material ratio curve values were observed. For example, the reduced peak height of cut coatings were 1.38 mi m, after burnishing Rpk value fell to 0.23 mi m.
Źródło:: Journal of KONES; 2012, 19, 1; 377-384
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Influence of the thickness of Ni-P coating applied on 7075 aluminum alloy on its hardness
Autorzy:: Czapczyk, K.
Siwak, P.
Jabłoński, P.
Furmański, Ł.
Grobelny, P.
Legutko, S.
Powiązania:: https://bibliotekanauki.pl/articles/957945.pdf
Data publikacji:: 2016
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: aluminum alloy AW-7075
Ni-P coating
hardness
Opis:: The paper presents the results of hardness tests of aluminum alloy AW-7075 (for plastic processing) and Ni-P chemical coatings (nickel-phosphorus) which had been applied by the no-current method. Coatings of various thickness have been made and their influence on the increase of the top layer hardness has been determined, as well as the increase of the hardness of the coating and substrate system after puncturing the coating with an indenter. The purpose of the investigation was to determine the possibility of applying the Ni-P coating for selected technical applications, among others, by the selection of its optimum thickness on the hard aluminum alloy and by the determination of the deformation resistance of the top layer if the given coating.
Źródło:: Advances in Science and Technology. Research Journal; 2016, 10, 32; 53-58
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Texture of surface of coatings obtained using the "Casto-Dyn 8000",torch, after burnishing treatment
Autorzy:: Starosta, R.
Powiązania:: https://bibliotekanauki.pl/articles/245991.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: flame spraying
burnishing
Ni-Al coating
Ni-Al-Al2O3 coating
torque pump
Opis:: The flame sprayed coatings are characterized by porosity, oxide inclusions presence and large real area of surface. In order to obtain adequate surface roughness coatings must be applied finishing. For this purpose, the turning and grinding are used. In the paper a burnishing to finishing flame sprayed coatings was proposed. Burnishing is not used during the processing of thermally sprayed coatings, as is commonly believed that this technology causes damage to coatings. The process of flame sprayed is a technology affordable and easy to implement. It does not require great skill of the operator. This method is not associated with expensive workstation equipment. It may therefore be used with success for the regeneration of machine parts by the crew of vessel engine room. Coatings of Ni-5% Al and Ni-5%Al-15%Al2O3 obtained by powder flame spraying were studied. Torch of "Casto-Dyn 8000" was used. After turning the average value of surface coatings roughness coefficient Ra =2.59 mi m (for Ni- 5%Al) mi m and Ra = 3.1mi m (for composite coating) was obtained. SRMD burnishing tool produced by "Yamato" company was used. Roller burnishing was performer on turning lathe. It was found that the increase in burnishing force and the reduction of burnishing speed and feed rate of less roughness of coatings are obtained. For Ni-5%Al coatings the lowest surface roughness, Ra = 0.3mi m was obtained after burnishing with the following parameters: the force - 1100 N, burnishing speed - 28m/min, feed - 0.08 mm/rev. During burnishing of Ni-5% Al-15% Al2O3 coatings applied force 700 N, Ra = 1.31 mi m was obtained. Greater burnishing force caused coatings damage. Burnishing compared to turning has positive influence on the curve shape of the material ratio. It was found that the parameters Rk and Rpk were reduced.
Źródło:: Journal of KONES; 2011, 18, 3; 413-420
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Influence of Heat Treatment on Properties of Ni-B/B Composite Coatings
Autorzy:: Mazurek, A.
Bartoszek, W.
Cieślak, G.
Gajewska-Midziałek, A.
Oleszak, D.
Trzaska, M.
Powiązania:: https://bibliotekanauki.pl/articles/352856.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Ni-B/B composite coating
Ni-B alloy coating
boron powder
heat treatment
Opis:: The results of research on preparations of alloy Ni-B/B composite coatings produced by chemical reduction method on a carbon steel substrate are collected in this paper. The alloy Ni-B coatings were also investigated for comparative purposes. The produced coatings were subjected to a heat treatment process. The boron powder with the particles size below 1 μm was used as the dispersion phase. The structure of the coatings was examined by X-ray diffraction method. Boron powder particles as well as surface morphology and topography were characterized by scanning electron microscopy. The roughness test, microhardness and corrosion resistance by potentiodynamic method and surface wettability tests were carried out. Analysis of the chemical composi-tion by the EDS method showed that the boron powder particles were evenly embedded in the entire volume of the coating. Ni-B/Bcomposite coatings are characterized by higher hardness than alloy Ni-B coatings. As a result of heat treatment, the Ni₃ B phase crystallized, which increased the hardness of the coating material. The incorporation of boron powder particles and heat treatment reduce the corrosion resistance of coatings. All produced coatings exhibited hydrophobic properties.
Źródło:: Archives of Metallurgy and Materials; 2020, 65, 2; 839-844
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Ocena jakości powłok galwanicznych Cr/Ni
Assessment of the galvanic Cr/Ni coatings quality
Autorzy:: Głowacka, M.
Szkodo, M.
Powiązania:: https://bibliotekanauki.pl/articles/258037.pdf
Data publikacji:: 2006
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
Tematy:: powłoka Cr/Ni
uszkodzenie eksploatacyjne
próba zarysowania
twardość
galvanic Cr/Ni coating
hardness
exploitation
scratch test
Opis:: W pracy przedstawiono wyniki porównawczych badań elementów armatury sanitarnej z mosiądzu ołowiowego pokrytego powłoką galwaniczną chromowo-niklową (Crr/Ni10b wg PN-EN 12540: 2002), które uległy przedwczesnemu zużyciu podczas dwuletniej eksploatacji oraz elementu, który wykazał się zużyciem normalnym w tych samych warunkach użytkowania i bieżącej konserwacji. Na podstawie badań metalograficznych, pomiaru chropowatości, próby twardości i próby zarysowania stwierdzono, że w badanej grupie elementów obciążenie krytyczne wywołujące odsłonięcie podłoża na całej szerokości rysy wykonywanej w próbie zarysowania oraz twardość mogą stanowić wskaźnik trwałości eksploatacyjnej.
The comparative investigations of the brass fittings for sanitary industry with the Cr/Ni coatings of different wear in two years exploitation have been presented. On the base of metallographical tests, surface roughness measurements, microhardness and scratch test were established, that hardness and critical normal force resulted of the brass exposure in a scratch test of coatings could determine a life time factor of fittings.
Źródło:: Problemy Eksploatacji; 2006, 1; 181-187
1232-9312
Pojawia się w:: Problemy Eksploatacji
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Cavitation erosion resistance of Ni-Co based coatings
Autorzy:: Szala, M.
Hejwowski, T.
Lenart, I
Powiązania:: https://bibliotekanauki.pl/articles/101864.pdf
Data publikacji:: 2014
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: cavitation erosion
Ni-Co based coating
PTA deposition
Opis:: The Ni-Co based coatings were performed by means of PTA method from Ni-based and Co-based powders. The cavitation erosion resistance of Ni-Co specimens and reference sample in deionized water was determined by the ultrasonic vibration system. The microstructure, as well as mechanism of cavitation erosion of coating was examined by using SEM and LOM. The main mechanism of erosion is cracking and spalling at the boundary of dendrites and eutectics. Coatings exhibit higher cavitation erosion resistance than the reference sample. Therefore, they could be applied to repair and protect pump elements from cavitation wear.
Źródło:: Advances in Science and Technology. Research Journal; 2014, 8, 21; 36-42
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Effect of Laser Surface Melting on Microstructure of Cold Sprayed Ni20Cr Coatings
Autorzy:: Soboń, D.
Powiązania:: https://bibliotekanauki.pl/articles/2049393.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: cold spraying
Ni20Cr coating
laser modification
mechanical properties
Opis:: In this study, Ni20Cr coatings were obtained by cold spraying on an aluminum alloy 7075 substrate. The obtained coatings were characterized by a uniform microstructure and low porosity. The sprayed coating has the same phase composition as the powder used. Next, the cold sprayed coatings were heat treated using a TRUMPF TLF 6000 TURBO (4 kW) CO2 laser. The laser surface melting of the coatings resulted in the formation of a columnar structure and an improvement in their mechanical properties. The Ni20Cr cold sprayed coatings after additional laser melting showed lower porosity and an increase in microhardness and Young`s modulus.
Źródło:: Archives of Metallurgy and Materials; 2021, 66, 3; 853-860
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: The effect of NI-TIO₂ and NI-TIO₂-graphene coatings and heat treatment hardening on solid particles erosion resistance of grade 410 stainless steel
Autorzy:: Khalid, Wissam
Al-Tameemi, Hamza A.
Powiązania:: https://bibliotekanauki.pl/articles/38912091.pdf
Data publikacji:: 2023
Wydawca:: Instytut Podstawowych Problemów Techniki PAN
Tematy:: solid particles erosion
wear rate
wear resistance
erosion testers
AISI 410 stainless steel
Ni-TiO2 coating
Ni-TiO2-graphene coating
Opis:: Erosion by solid particles is a serious problem in many applications, especially in rotary machines with steel blades. Many coatings are currently being developed to improve erosion resistance. This study focuses on investigating the solid particles erosion (SPE) resistance of AISI 410 stainless steel and improving the SPE resistance using three different anti-wear techniques: hard coating (Ni-TiO₂), hard coating with low shear resistance (Ni-TiO₂-graphene) and hardening by heat treatment. The study also investigates the effect of different factors, including impact angle, jet pressure (particle speed) and solid particle type on each of the four types of specimens. The investigated anti-wear techniques improved the erosion wear rate by different percentages, such as 35.2% using Ni-TiO₂ coating, 36% using Ni-TiO₂-graphene, and 53.75% using heat-treatment when silica sand, a 45◦ impact angle and a speed of 36.72 m/s were used. The results indicate a ductile erosion mechanism as the weight loss decreases with an increase in the impact angle. The investigated coatings were found to provide more stable erosion resistance under different impact angles. Surface roughness was reduced after SPE for coated surfaces, and surfaces showing a lower wear rate may not necessarily show less change in surface roughness. It was observed that deformation in the form of waviness only occurs when the surface is impacted by small rounded particles at a 45◦ angle. Wear rate parameters were calculated, which can be used to estimate the wear rate for the investigated material under various conditions.
Źródło:: Engineering Transactions; 2023, 71, 4; 571-593
0867-888X
Pojawia się w:: Engineering Transactions
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: The study of linear correlation between surface roughness parameters and adhesion of flame sprayed coatings
Autorzy:: Mikuliszyn, J.
Starosta, R.
Powiązania:: https://bibliotekanauki.pl/articles/246506.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: flame spraying
adhesion
roughness parameters
Ni-5%Al coating
correlation
Opis:: Adhesion is one of the reasons for limiting the use of thermally sprayed coatings. Many factors influence the adhesion of thermally sprayed coatings, for example: quality of the workmanship of surface preparation, method of thermal spraying, processing parameters, and the temperature of the preliminary preheat substrate, properties of the substrate and coating materials. Another one is the surface roughness. Attempts are made to use surface roughness parameters (e.g. Ra, Rz, Rq, Rku, Rsk) for prediction of adhesion of thermally sprayed coatings. However, most often these attempts end in failure. This article discusses the task of assessing the linear correlation between the twelve parameters of roughness or material ratio of various surface profiles and strength bond of coatings. For analysis, the following parameters were selected: Rz, Ra, Rq, Rsk, Rt, RSm, Rp, Rv, Rku, Rmr (50%), Rk, Rpk, Rvk. The steel substrates (S185) were machined by abrasive machining. The surface roughness of the steel substrate ranged Rz = 1.89-5.34 mm. Nickel-based coatings were applied by flame spraying by the Casto Dyn DS 8000 torch. Adhesion of coatings was measured by pull – off method. The flame sprayed coatings were characterized by adhesion to the steel substrate in the range of from 5.53 MPa to 8.28 MPa. The highest value of the correlation coefficient (Pearson – R)between parameters Rp, Rpk, and adhesion of thermally sprayed coatings were found. The coefficient R was equalto the 0.83, and the coefficient of determination R2 = 0.7. The lowest value of the correlation coefficient was found for the Rku roughness parameter amounting to 0.37. In the measurements carried out, it can be concluded that the prediction of adhesion of the coatings according to the roughness of the substrate, should be carried out by use the parameters characterizing the peaks height of roughness profile.
Źródło:: Journal of KONES; 2016, 23, 1; 223-229
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Study of the effect of the electroless NI-P coating thickness applied on AW-7075 aluminum alloy on its mechanical properties
Autorzy:: Czapczyk, Kazimierz
Siwak, Piotr
Legutko, Stanislaw
Powiązania:: https://bibliotekanauki.pl/articles/957974.pdf
Data publikacji:: 2018
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: Ni-P coating
Martens hardness
creep
Young's modulus
aluminium alloy
powłoka Ni-P
pełzanie
Moduł Younga
stop aluminium
Opis:: The paper presents the results of examination of microhardness of chemical coatings Ni-P, applied on samples of aluminium alloy for plastic processing AW-7075. The examinations have been performed on samples with three different thicknesses of the Ni-P coatings; next the influence of their thickness on the depth of material penetration by the indenter under load, as well as its influence on creep, increase of Martens hardness and on the Young’s modulus of the system of the coating with the substrate material. Hardness measurements have been performed with the use of PICODENTOR HM500 nanohardness tester (Vickers). The purpose of the examination of Ni-P coating deformation without dispersion phases is analysis of their mechanical properties in respect of the possibility of technical applications on the aluminium alloy AW-7075 (among others, by the selection of optimum thicknesses on hard aluminium alloy), as well as the determination of the possibility of applying dispersion phases in order to improve their properties.
Źródło:: Advances in Science and Technology. Research Journal; 2018, 12, 2; 291-297
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Microstructure and selected properties of Ni-Cr-Re coatings deposited by means of plasma thermal spraying
Mikrostruktura i wybrane właściwości powłok Ni-Cr-Re wytwarzanych metodą natryskiwania plazmowego
Autorzy:: Tobota, Konrad
Chmielewski, Marcin
Dusza, Ján
Powiązania:: https://bibliotekanauki.pl/articles/115033.pdf
Data publikacji:: 2020
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: natryskiwanie plazmowe
powłoka Ni-Cr-Re
właściwości
mikrostruktura
plasma spraying
Ni-Cr-Re coating
properties
microstructure
Opis:: The article presents the results of research on plasma sprayed Ni-Cr-Re coatings. The substrate was 16Mo3 chromium-molybdenum steel used in the production of boilers. The coatings were sprayed with Oerlikon Amdry 4535 80% Ni, 20% Cr powder with 20-45μm granulation. 1% metallic rhenium was added to the base powder using a high energy ball milling method. Rhenium is a heavy, high-density metal. As an alloying addition, it improves the heat resistance of alloys, creep resistance and high temperature oxidation. Rhenium alloys are widely used in the energy and aviation industries as an alloying additive to prevent creep. Observations were made on an optical microscope and a SEM microscope. Hardness tests and optical surface testing with a profilometer were carried out.
W artykule przedstawiono wyniki badań nad powłokami Ni-Cr-Re natryskiwanymi plazmowo. Podłoże stanowiła stal kotłowa chromowo-molibdenowa 16Mo3. Powłoki natryskiwano materiałem w postaci proszku Oerlikon Amdry 4535 80% Ni, 20% Cr o granulacji 20-45fμm. Do bazowego proszku dodano 1% metalicznego renu stosując metodę wysokoenergetycznego mielenia w młynie kulowym. Ren jest dodatkiem stopowym poprawiającym żarowytrzymałość stopów, odporność na pełzanie i utlenianie wysokotemperaturowe. Stopy z dodatkiem renu mają szerokie zastosowanie w przemyśle energetycznym i lotniczym. Przeprowadzono badania metalograficzne mikroskopowe, próby twardości oraz optyczne badanie powierzchni profilometrem.
Źródło:: Welding Technology Review; 2020, 92, 5; 15-23
0033-2364
2449-7959
Pojawia się w:: Welding Technology Review
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Wpływ zawartości fosforu na zwilżalność podłoży z pokryciem Ni-P lutowiem SAC305
Effect of phosphorus content on the wettability of Ni-P coated surfaces by SAC305 alloy
Autorzy:: Kudyba, A.
Sobczak, N.
Siewiorek, A.
Turalska, P.
Klasik, A.
Bieliński, J.
Sałacińska, A.
Kozera, R.
Powiązania:: https://bibliotekanauki.pl/articles/391616.pdf
Data publikacji:: 2014
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Odlewnictwa
Tematy:: SAC305
pokrycie Ni-P
kąt zwilżania
kinetyka zwilżania
lutowanie bezołowiowe
Ni-P coating
contact angle
wetting angle
wettability kinetics
lead-free soldering
Opis:: Celem badań było określenie wpływu składu chemicznego pokrycia Ni-P na kinetykę zwilżania ciekłego lutowia SAC305 w kontakcie z pokryciem Ni-P. Badania przeprowadzono w próżni w temperaturze 230°C w czasie 5 minut, stosując metodę kropli leżącej w połączeniu z osobnym nagrzewaniem badanej pary materiałów, pozwalającej na eksperymentalne wyznaczanie wartości kąta zwilżania θ. Do badań użyto stop lutowniczy SAC305 (3% wag. Ag, 0,5% wag. Cu, Sn – osnowa) oraz podłoża niklowe (Ni 99,8% wag.), na które naniesione zostało pokrycie Ni-xP o dwóch różnych zawartościach fosforu (x = 4,3% wag. lub 11,6% wag.). Po badaniach zwilżalności przeprowadzono analizę strukturalną powierzchni próbek metodą skaningowej mikroskopii elektronowej, koncentrując się na obserwacji granicy SAC305/podłoże. W celu określenia wpływu zawartości fosforu w pokryciu Ni-P na wytrzymałość wytworzonych połączeń SAC305/Ni-xP/Ni poprzeczne przekroje próbek poddano testom na ścinanie, stosując udoskonaloną metodę push-off shear test. Stwierdzono, że dla wybranego zakresu 4,3 ≤ P ≤ 11,6 wzrost zawartości fosforu w pokryciu poprawia zwilżalność badanych układów ciekłym lutowiem SAC305, lecz jest to efekt pozorny wynikający z penetracji lutowia w nieciągłości strukturalne powstające w warstwie Ni-11,6P na skutek przemian fazowych. Dla próbki SAC305/ Ni-11,6P/Ni wartość kąta zwilżania θ = 54° jest mniejsza w porównaniu do próbki SAC305/Ni-4,3P/Ni, dla której θ = 75°, przy tym wytrzymałość na ścinanie wytworzonych połączeń praktycznie nie ulega zmianie, wykazując dla próbki SAC305/Ni-11,6P/Ni τ_max = 15,6 MPa w porównaniu τ_max = 14,2 MPa dla próbki SAC305/Ni-4,3P/Ni.
The aim of this study was to determine the effect of the chemical composition of Ni-P coating on the wettability kinetics of SAC305 liquid solder in contact with the Ni-P coating. The study was conducted in vacuum, at 230°C, for 5 minutes, using the sessile drop method in combination with a separate heating of the two test materials, allowing for experimental determination of the contact angle θ. The study used a SAC305 solder (Sn base, Ag 3 wt. %, Cu 0.5 wt. %) and a nickel substrate (Ni 99.8 wt. %) onto which Ni-xP coating of two different levels of phosphorous was applied (x = 4.3 wt. %, or 11.6 wt. %). After the tests of wettability were performed, structural analysis of the surface of the samples was performed by scanning electron microscopy, focusing on the observation of the border SAC305/substrate. In order to determine the effect of phosphorus in the Ni-P coating on the strength of the SAC305/Ni-xP/Ni joints formed, cross sections of samples were tested for shear strength using the improved method of the push-off shear test. It was found that, for the selected range of 4.3 ≤ P ≤ 11.6, increase in the phosphorus content in the coating improves the wettability of the liquid systems tested with the SAC305 solder, but it is an apparent effect resulting from the solder’s penetration of the structural discontinuities formed in the layer of Ni-11.6P, due to phase transitions. For the SAC305/ Ni-11.6P/Ni sample, value of the contact angle θ = 54° is smaller, as compared to the SAC305/Ni-4.3P/Ni sample, for which θ = 75°, the shear strength of the joints produced shows virtually no changes, for the SAC305/Ni-11.6P/Ni sample τ_max = 15.6 MPa, as compared to τ_max = 14.2 MPa for the SAC305/Ni-4.3P/Ni sample.
Źródło:: Prace Instytutu Odlewnictwa; 2014, T. 54, nr 4, 4; 51-62
1899-2439
Pojawia się w:: Prace Instytutu Odlewnictwa
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Microstructure and selected properties of Ni-Cr-Re coatings deposited by means of HVOF thermal spraying
Mikrostruktura i wybrane właściwości powłok Ni-Cr-Re natryskiwanych cieplnie metodą HVOF
Autorzy:: Tobota, Konrad
Chmielewski, Tomasz
Chmielewski, Marcin
Powiązania:: https://bibliotekanauki.pl/articles/115113.pdf
Data publikacji:: 2019
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: natryskiwanie HVOF
powłoka Ni-Cr-Re
natryskiwanie cieplne
mikrostruktura
właściwości
HVOF spraying process
Ni-Cr-Re coating
thermal spraying
microstructure
properties
Opis:: The article presents selected results of testing Ni-Cr-Re coatings deposited by means of HVOF supersonic spray. The substrate made of 16Mo3 chromium molybdenum boiler steel was sprayed with a powder material of Oerlikon Amdry 4535 80% Ni, 20% Cr, 20÷45 μm, to which 1% of metallic rhenium was added using the high energy milling method in a ball mill. The Rhenium is an alloying additive that improves the heat resistance of alloys, creep and high temperature oxidation resistance. Alloys with the addition of rhenium are widely used in the aerospace industry (nickel superalloys) and in power industry. Metallographic microscopic examinations, microhardness tests and surface profilometry were carried out.
W artykule przedstawiono wybrane wyniki badań powłok Ni-Gr-Re natryskiwanych naddźwiękowo. Podłoże ze stali kotłowej chromowo-molibdenowej 16Mo3 natryskiwano materiałem powłokowym w postaci proszku Oerlikon Amdry 4535 80% Ni, 20% Cr o granulacji 20÷45 μm, do którego dodano 1% metalicznego renu stosując metodę wysokoenergetycznego mielenia w młynie kulowym. Ren jest dodatkiem stopowym poprawiającym żarowytrzymałość stopów, odporność na pełzanie i utlenianie wysokotemperaturowe. Stopy z dodatkiem renu mają szerokie zastosowanie w przemyśle lotniczym (nadstopy niklu) oraz w energetyce. Przeprowadzono badania metalograficzne mikroskopowe, próby mikrotwardości oraz badanie powierzchni profilometrem optycznym.
Źródło:: Welding Technology Review; 2019, 91, 1; 25-30
0033-2364
2449-7959
Pojawia się w:: Welding Technology Review
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Comparison of tribological properties and structure of coatings produced in powder flame spraying process on grey cast iron
Porównanie własności tribologicznych i struktury powłok natryskiwanych płomieniowo proszkowo na podłoże z żeliwa szarego
Autorzy:: Czupryński, Artur
Adamiak, Marcin
Bayraktar, Emin
Wyględacz, Bernard
Powiązania:: https://bibliotekanauki.pl/articles/115087.pdf
Data publikacji:: 2020
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: rozpylanie płomieniowe
stop samotopnikujący
powłoka Ni-B-Si
żeliwo szare
właściwości tribologiczne
flame spraying
self-fluxing alloy
Ni-B-Si coating
grey cast iron
tribological properties
Opis:: In this article results of tribological and structural properties comparison of flame sprayed, by SupJet-S-Eutalloy® multipurpose system, two self-fluxing alloys of Ni-B-Si type in the form of powder for spraying with remelting are presented. Layers were produced on EN-GJL-250 grade grey cast iron with flake graphite in an austenitic matrix. Abrasive wear resistance examination acc. to ASTM G65-00 and erosive wear resistance examination acc. to ASTM G76-2 were performed. Obtained results were compared with abrasion-resistant steel Hardox® 400. Macro- and microscopic examination were carried enabling layer quality evaluation and structure of examined layer and base material determination. X-ray microanalysis was performed to obtain qualitative and quantitative data about microareas chemical composition. The Eutalloy® BronzoChrom 10185 powder flame sprayed layer with higher Boron and Silicon content was characterized by 13% lower wear intensity under mineral abrasive conditions and about 30% higher erosion wear resistance than Eutalloy® NiTec 10224 powder flame sprayed layer.
W artykule przedstawiono wyniki badań dotyczące porównania właściwości tribologicznych i strukturalnych powłok, natryskiwanych płomieniowo za pomocą wielofunkcyjnego systemu SupJet-S-Eutalloy® dwoma różniącymi się składem chemicznym samotopnikującymi stopami typu Ni-B-Si w postaci proszku metalicznego przeznaczonego do natrysku z jednoczesnym przetopieniem. Powłoki wykonano na podłożu z żeliwa szarego gatunku EN-GJL-250 z grafitem płatkowym w osnowie austenitycznej. Przeprowadzono badania odporności na zużycie ścierne wg normy ASTM G65-00 oraz odporności na zużycie erozyjne zgodnie z normą ASTM G 76-2. Uzyskane wyniki porównano z parametrami zużycia abrazyjnego stali trudnościeralnej Hardox® 400. Wykonano obserwacje metalograficzne makro i mikroskopowe pozwalające na określenie jakości powłok oraz struktur badanych warstw i materiału podłoża. W celu określenia jakościowego i ilościowego składu chemicznego mikroobszarów powłok przeprowadzono badania metodą mikroanalizy rentgenowskiej. Stwierdzono, że powłoka natryskiwana płomieniowo proszkiem Eutalloy® BronzoChrom 10185 zawierającym większe stężenie boru i krzemu wykazywała o ok. 13% mniejszą intensywność zużycia pod wpływem oddziaływania ścierniwa mineralnego oraz o ok. 30% większą odporność na zużycie erozyjne niż powłoka natryskiwana płomieniowo proszkiem Eutalloy® NiTec 10224.
Źródło:: Welding Technology Review; 2020, 92, 3; 7-21
0033-2364
2449-7959
Pojawia się w:: Welding Technology Review
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 16.

Tytuł:: Properties of Ni60/SiO2 Coating Prepared by the Pyrolysis Products of Rice Husk
Autorzy:: Wei, Chunxue
Li, Hongbing
Powiązania:: https://bibliotekanauki.pl/articles/2203726.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Ni60/SiO2
coating
rice husk
hardness
wear
Opis:: Surface coating technology, as the main technology to improve the fatigue life of mechanical systems, has been well applied in mechanical equipment. The present study aimed to explore low-cost surface coating preparation technology using inexpensive rice husk as the research object, and the pyrolysis process behavior of rice husk was analyzed. The Ni60/SiO2 coating was prepared on the surface of the 45# steel substrate using the pyrolysis product SiO2 fiber as the reinforcing phase and supersonic plasma-spraying equipment. The results showed no defects such as cracks, pores, and inclusions in the prepared coating. The nanohardness of the Ni60/SiO2 coating reached 6506 μN, and the average friction coefficient reached 0.42. In the friction-and-wear experiment, the Ni60/SiO2 coating was manifested as an abrasive wear mechanism.
Źródło:: Archives of Metallurgy and Materials; 2023, 68, 1; 37--42
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 17.

Tytuł:: Comparison of the properties of nickel coatings reinforced with dispersion SiC particles of micrometric, submicrometric and nanometric size deposited on the 5xxx series aluminium alloy
Porównanie właściwości powłok niklowych zbrojonych cząstkami SiC, o rozmiarach mikrometrycznych, submikrometrycznych i nanometrycznych osadzanych na stopie aluminium serii 5xxx
Autorzy:: Najder, A.
Nowak, M.
Bigaj, M.
Żelechowski, J.
Opyrchał, M.
Karaś, M
Powiązania:: https://bibliotekanauki.pl/articles/351027.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: nickel coatings
Ni-SiC
composite coating
powłoki niklowe
powłoki kompozytowe
Opis:: In this study, Ni-SiC composite coatings were electroplated on the 5xxx series aluminium alloy substrate. The effect of the quantity (25g/l i 50g/l) and the size (3 m, 0,41 m and 50nm) of SiC particles introduced into the bath as a dispersed phase on properties of the coatings was tested. The influence of these parameters on thickness, microhardness, surface structure, abrasion resistance and corrosion resistance of nickel composite coatings was determined.
W niniejszej pracy powłoki Ni-SiC, osadzano elektrolitycznie na stopie aluminium serii 5xxx. Przedstawiono wyniki badań dotyczące wpływu ilości (25g/l i 50g/l) oraz wielkości cząstek SiC (3 m, 0,41 m oraz 50nm), wprowadzanych do kąpieli niklowych jako faza zdyspergowana, na właściwości otrzymanej powłoki niklowej. Określono wpływ tych parametrów na grubość, mikrotwardość, strukturę powierzchni, odporność na ścieranie oraz odporność korozyjną otrzymanych kompozytowych powłok niklowych.
Źródło:: Archives of Metallurgy and Materials; 2014, 59, 1; 349-353
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 18.

Tytuł:: Effect of burnishing on the corrosion properties of Ni-5%Al AND Ni-5%Al-15%Al2O3 coatings obtained by plasma spraying
Autorzy:: Starosta, R.
Powiązania:: https://bibliotekanauki.pl/articles/245849.pdf
Data publikacji:: 2014
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: plasma spraying
composite coating
Ni-Al
burnishing
corrosion
polarization test
EIS test
Opis:: The Ni-5%Al alloy coatings and Ni-5% Al-15%Al2O3 composite coatings were obtained by plasma spraying method. The PN120 gun was used. The coatings onto a shaft made of austenitic stainless steel (X5CrNi 18-10) were sprayed. The coatings were subjected to turning, burnishing. The evaluation of corrosion properties were based on the measurements of corrosion current density and corrosion potential (polarization method), the charge transfer resistance and exponent of constant phase element impedance (electrochemical impedance spectroscopy method). Corrosion tests were performed in replacement seawater (3.5% sodium chloride solution). On the basis of studies, the effect of finishing type on the corrosion properties of plasma sprayed coatings has been demonstrated. The lowest corrosion current density was found for Ni-5% Al coatings after burnishing, icorr value equal to 0.96 A/cm2, and the charge transfer resistance was 27007 Ωcm2. The lowest resistance to corrosion of turned Ni-5%Al-15%Al2O3 composite coatings was observed. These coatings were characterized by the following parameters of corrosion process: icorr = 17.64 A/cm2, Rct = 2137 Ωcm2. Burnishing caused increased corrosion resistance of coatings. Due to reduced roughness and waviness are obtained reduction of the area of the actual burnished coatings compared to turned coatings. Thus, it is resulting in reduced values of corrosion current density. After finishing treatment, the plasma sprayed Ni-5%Al-15%Al2O3 coatings characterized by lower corrosion resistance compared to the alloy coating. The presence of the reinforcing phase in the coating promotes the increase of the porosity. The plasma sprayed coatings on nickel matrix had a tendency to localized corrosion in sodium chloride solution.
Źródło:: Journal of KONES; 2014, 21, 1; 273-280
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 19.

Tytuł:: Effect of Isothermal Treatment on Ni3Al Coatings Deposited by Air Plasma Spraying System
Autorzy:: Mehmood, K.
Rafiq, M. A.
Durrani, Y. A.
Khan, A. N.
Powiązania:: https://bibliotekanauki.pl/articles/354178.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: air plasma spraying
Ni-20Al
residual stresses
intermetallic coating
nickel aluminide
Opis:: Ni₃Al coatings were obtained on AISI 321 steel samples by air plasma spraying system. The behavior of heat treatment on intermetallic coatings were evaluated after exposure at various temperatures i.e. 500ºC to 800ºC. The stay time in this regard was varied from 10 to 100 hours. The coatings were then characterized by X-Ray diffraction analysis, optical and scanning electron microscopy, eddy current measurements and stress analysis. It was observed that the formation of NiO increases drastically with time and temperature. The hardness of the coating increases with the formation of NiO. It was noted that the residual stresses can be correlated with the formation of NiO. Further, the development of residual stresses can be monitored by a non-destructive technique i.e. eddy current method.
Źródło:: Archives of Metallurgy and Materials; 2018, 63, 1; 277-283
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 20.

Tytuł:: Effect of finishing on the corrosion properties of flame sprayed Ni-5%Al and Ni-5%Al-Al2O3 coatings
Autorzy:: Charchalis, A.
Starosta, R.
Powiązania:: https://bibliotekanauki.pl/articles/247338.pdf
Data publikacji:: 2014
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: flame spraying
composite coating
Ni-Al
burnishing
corrosion
potentiodynamic test
EIS test
Opis:: The Ni-5%Al alloy and Ni-5% Al-Al2O3 composite coatings were obtained by a flame spraying method, “Casto- Dyn DS 8000” torch was used. The coatings onto a substrate made of austenitic stainless steel (X5CrNi18-10) were sprayed. The coatings were subjected to turning, burnishing and grinding. The evaluation of corrosion properties were based on the measurements of direct current (potentiodynamic method) and the alternating current (EIS method). Corrosion tests were performed in a 3.5% sodium chloride solution. On the basis of studies, the effect of finishing type on the corrosion properties of flame sprayed coatings has been demonstrated. The lowest corrosion current density was found for Ni-5%Al coatings after burnishing, icorr value equal to 0.76 μA/cm2, and the charge transfer resistance was 31063 Ω/cm2. The lowest resistance to corrosion of grinded Ni-5%Al-Al2O3 composite coatings was observed. These coatings were characterized by the following parameters of corrosion process: icorr = 14.01 μA/cm2, Rct = 3260 Ω/cm2. Burnishing caused increased corrosion resistance of both coatings. Due to reduced roughness and waviness are obtained reduction of the area of the actual burnished coatings compared to turned coatings. Thus, it is resulting in reduced values of corrosion current density. After finishing treatment, the thermally sprayed Ni-5%Al-15%Al2O3 coatings characterized by lower corrosion resistance compared to the alloy coating. The presence of the reinforcing phase in the coating promotes the increase of the porosity. Burnishing does not cause a significant change in porosity of the coating. The flame sprayed coatings on nickel-based have a tendency to localized corrosion in seawater environment.
Źródło:: Journal of KONES; 2014, 21, 4; 29-36
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 21.

Tytuł:: Effect of High Frequency Heat Treatment on the Microstructure and Macroscopic Properties of WC-50Ni+Stellite 1 Coating Layer Fabricated by HVOF Spray Process
Autorzy:: Ham, Gi-Su
Wi, Dong-Yeol
Park, Sun-Hong
Lee, Kee-Ahn
Powiązania:: https://bibliotekanauki.pl/articles/354654.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: HVOF spray
WC-50Ni
Stellite 1
composite coating
high frequency heat treatment
Opis:: The microstructure and macroscopic properties of WC-50Ni+stellite 1(Co-Cr-W, ST1) coating layer fabricated by HVOF spray have been investigated. WC-50Ni powder and ST1 powders were mixed in the ratio of 1:0 and 5:5 wt.%, respectively. Argon heat treatment (Ar) and high-frequency heat treatment (H.F.) were conducted on the coating materials. WC was decomposed in the Ar heat treatment specimen, but decomposition of WC was not observed in the H.F. heat treatment specimen. Hardness was measured for as-sprayed WC-50Ni (821.5Hv) and as-sprayed WC-50Ni+ST1 (668.1 Hv). Hardness of Ar heat treatment specimen was reduced by about 14~18% than that of the as-sprayed coating layers. However, when the H.F. heat treatment was performed, the hardness inversely increased by about 6~10% than the as-sprayed coating layer. Based on these results, the method to improve the mechanical property of HVOF sprayed WC-50Ni+ST1 coating layer has also been also discussed.
Źródło:: Archives of Metallurgy and Materials; 2020, 65, 3; 1087-1092
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 22.

Tytuł:: Some properties of platinum and palladium modified aluminide coatings deposited by CVD method on nickel-base superalloys
Właściwości warstw aluminidkowych modyfikowanych platyna i palladem wytworzonych metodą CVD na podłożu nadstopów niklu
Autorzy:: Zagula-Yavorska, M.
Sieniawski, J.
Gancarczyk, T.
Powiązania:: https://bibliotekanauki.pl/articles/355003.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: stopy niklu
CVD
aluminiowanie
platinum and palladium modified aluminide coating
low-activity CVD process
Ni-base superalloy
oxidation resistance
Opis:: In the paper some functional properties (hardness and oxidation resistance) of platinum and palladium modified aluminide coatings deposited by the CVD method on a nickel-based superalloy were determined. The platinum and palladium microlayers, 3 μm thick were deposited by electroplating process. The heat treatment of electroplating microlayers was performed for 2h at the temperature 1050 degree Celsjus in an argon atmosphere as to increase adhesion between the coating and the substrate. The low activity CVD aluminizing process of platinum heat treated coatings 3 μm thick at the 1050degree Celsjus for 8h using IonBond equipment was performed. The effects of aluminizing process were verified by the use of an optical microscope (microstructure and coating thickness); a scanning electron microscope and an energy dispersive spectroscope (chemical composition of the surface and cross-section of the modified aluminide coating). The hardness measurements on the cross-section of nonmodified and platinum or palladium modified aluminide coatings were performed. Oxidation tests of modified aluminide coatings at the 1100 degree Celsjus for 1000 h in the air atmosphere were carried out. On the grounds of the obtained results it was found that the main phase of the platinum modified aluminide coating is β-(Ni,Pt)Al. Consequently, the palladium modification of aluminide coating causes the formation of β-(Ni,Pd)Al phase. The platinum modified aluminide coating has better oxidation resistance than nonmodified and palladium modified aluminide coating. The XRD analysis of the surface of oxidized platinum modified aluminide coating confirmed the presence of the thermodynamically stable oxide layer Al₂O₃, that has good protective properties. The oxides of NiAl₂O₄, Al_1:98Cr_0:02O₃ and TiO₂ were found on the surface of the palladium modified aluminide coating after 1000 h oxidation at the 1100 degree Celsjus the in the air atmosphere.
W pracy określono niektóre właściwości użytkowe (twardość oraz żaroodporność) warstwy aluminidkowej modyfikowanej platyną i palladem wytworzonej metodą CVD na podłożu nadstopów niklu, polikrystalicznym Inconel 713 LC i monokrystalicznym - CMSX 4. Powlokę platyny i palladu (grubość - 3μm) wytworzono metodą galwaniczną. Poprawę przyczepności powłoki galwanicznej do podłoża uzyskano przez wygrzewanie w temperaturze 1050 stopni Celsjusza w czasie 2 h w atmosferze argonu. Warstwę aluminidkowa wytworzono w procesie niskoaktywnym CVD (temperatura - 1050 stopni Celsjusza, czas - 8h). Efekty procesu aluminiowania weryfikowano w badaniach mikroskopowych (mikrostruktura i głębokość warstwy) oraz w analizie składu chemicznego na powierzchni i przekroju warstwy modyfikowanej. Pomiary twardości prowadzono na przekroju niemodyfikowanej warstwy aluminidkowej oraz warstwie modyfikowanej platyna i palladem. Próbę zmęczenia cieplnego wykonano w temperaturze 1100 stopni Celsjusza i w czasie 1000 h w atmosferze powietrza. Analiza uzyskanych wyników badan pozwała stwierdzić, ze głównym składnikiem fazowym mikrostruktury modyfikowanej platyną warstwy aluminidkowej są kryształy fazy &beta ;-(Ni,Pt)Al. Modyfikowanie palladem warstwy aluminidkowej prowadzi do tworzenia się kryształów fazy &beta ;-( -(Ni,Pd)Al jako głównego składnika fazowego mikrostruktury warstwy. Warstwę aluminidkowa modyfikowaną platyną charakteryzuje większa żaroodporność w porównaniu do warstwy aluminidkowej modyfikowanej palladem lub niemodyfikowanej. Analiza składu fazowego na powierzchni warstwy aluminidkowej modyfikowanej platyna po próbie zmęczenia cieplnego wykazała obecność zgorzeliny składającej sie z termodynamicznie stabilnego tlenku Al.₂O₃: Tlenek NiAl₂O₄; Al1:98Cr0:02O3 oraz rutyl TiO₂ zaobserwowano na powierzchni warstwy aluminidkowej modyfikowanej palladem po 1000 h utleniania w temperaturze 1100 stopni Celsjusza w atmosferze powietrza.
Źródło:: Archives of Metallurgy and Materials; 2012, 57, 2; 503-509
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 23.

Tytuł:: Failure modes of coatings on steel substrate
Autorzy:: Mróz, K. P.
Kucharski, S.
Doliński, K.
Bigos, A.
Mikułowski, G.
Beltowska-Lehman, E.
Nolbrzak, P.
Powiązania:: https://bibliotekanauki.pl/articles/200891.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Ni-W coatings
MoS2TiW coating
steel substrate
fracture
coatings strength
axisymmetric bending test
powłoki Ni-W
powłoki MoS2TiW
podłoże stalowe
pęknięcie
wytrzymałość powłok
osiowa próba zginania
Opis:: The critical monotonic strain of Ni-W and MoS2(Ti,W) coatings on steel substrates was studied. The idea of axisymmetric bending test (called here as coin bending test) limited to monitoring of the coating failure was used. Experiments revealed mechanism of the coating failure, as cracking initiated from coating surface defects and/or substrate was demonstrated using indentation technique. By pushing the center of the uncoated side of a circular plate, the axisymmetric stress state was generated in the coating. The stress components varied gradually from the greatest value in the center to the smallest value at the edge of the specimen. The changes of the sample surface as a result of loading were monitored step by step via optical microscopy.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2016, 64, 1; 249-256
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 24.

Tytuł:: Effect of heat treatment on microhardness of electroless Ni-YSZ cermet coating
Autorzy:: Bahiyah Baba, N.
Ghazali, A. S.
Abdul Rahman, A. H.
Sharif, S.
Powiązania:: https://bibliotekanauki.pl/articles/2201036.pdf
Data publikacji:: 2022
Wydawca:: Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:: Ni-YSZ
cermet
coating
microhardness
heating temperature
heating time
electroless nickel
powłoka
mikrotwardość
temperatura nagrzewania
czas nagrzewania
bezprądowe powlekanie niklem
Opis:: Purpose: The paper discussed the effect of heat treatment on electroless nickel-yttria-stabilised zirconia (Ni-YSZ) cermet coating. Ni-YSZ cermet coating has potential applications such as cutting tools, thermal barriers, solid oxide fuel anode, and various others. The compatibility of ceramic YSZ and metallic nickel in terms of the mechanical properties such as hardness by varying the heating temperature, time and ceramic particle size is highlighted. Design/methodology/approach: Ni-YSZ cermet coating was deposited onto a highspeed steel substrate using the electroless nickel co-deposition method. The temperature and time were varied in a range of 300-400°C and 1-2 hours, respectively. The microhardness measurements were carried out using a Vickers microhardness tester (Shimadzu) according to ISO 6507-4. The surface characterisation of the cermet coating was carried out using JOEL Scanning Electron Microscope (SEM) coupled with Energy Dispersive X-ray (EDX) JSM 7800F. The crystallographic structure of materials was analysed by X-ray diffraction (XRD) Bruker D8 Advance instrument. Findings: It was found that the microhardness of Ni-YSZ cermet coating with the ratio of 70:30, respectively, is directly proportional to the heating temperature and time. Heating the Ni-YSZ cermet coating at 300°C from room temperature (rtp) to 1 hour shows a 12% microhardness increment, while from 1 to 2 hours gives a 19% increment. Compared to heating at 350°C and 400°C, the increment is more significant at 33% and 49% for rtp to 1 hour and 8% and 16% for 1 to 2 hours, respectively. In addition, the effect of varying YSZ particle size in the Ni-YSZ cermet gave response differently for heating temperature and heating time. Research limitations/implications: The paper is only limited to the discussion of the heat treatment effect on Ni-YSZ cermet coating hardness property. The tribological effect will be in future work. Practical implications: The microhardness data may vary due to the Vickers microhardness force applied and the amount of ceramic particle incorporation and phosphorus content in the nickel matrix. Originality/value: The value of this work is the compatibility of the ceramic YSZ and metallic nickel matrix in terms of mechanical properties, such as hardness, upon heat treatment.
Źródło:: Journal of Achievements in Materials and Manufacturing Engineering; 2022, 113, 1; 5--12
1734-8412
Pojawia się w:: Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Parametric optimisation of microhardness on heat-treated electroless Ni-YSZ cermet coating
Autorzy:: Bahiyah Baba, N.
Ghazali, A. S.
Abdul Rahman, A. H.
Sharif, S
Powiązania:: https://bibliotekanauki.pl/articles/2172165.pdf
Data publikacji:: 2022
Wydawca:: Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:: full factorial
electroless
Ni-YSZ
cermet
coating
microhardness
treating temperature
treating time
silnia
bezprądowy
powłoka
mikrotwardość
temperatura obróbki
czas obróbki
Opis:: Purpose The paper discusses the parametric optimisation of the electroless Ni-YSZ cermet coating microhardness upon heat treatment. Heat treatment is a process to increase the mechanical properties of the electroless nickel coating and it can be enhanced by manipulating its parameters. Parametric optimisation is conducted by the design of experiment full factorial 3x3 with 27 runs. Treating temperature, treating time and ceramic particle size parameters at 3-level are evaluated using statistical tool ANOVA in Minitab20. Design/methodology/approach Ni-YSZ cermet coating is deposited onto a high-speed steel substrate using the electroless nickel co-deposition method. The temperature and time were varied in a range of 300-400oC and 0-2 hours respectively. The microhardness measurements were carried out using a Vickers microhardness tester (Shimadzu) according to ISO 6507-4. The surface characterisation was analysed using Cambridge Stereoscan 90 Scanning Electron Microscope (SEM) coupled with Energy Dispersive X-ray Analysis (EDXA). Findings The optimum condition in obtaining high microhardness on Ni-YSZ cermet coating is evaluated by statistical tool ANOVA in Minitab20 software. It is found that the most significant parameter for high microhardness is at the treating temperature of 400oC followed by treating time at 2 hours using nano-sized YSZ particles. The ceramic particle size is found not a significant parameter in obtaining a high microhardness, however it has effect on interaction between treating temperature and treating time. Research limitations/implications The paper only limits to the optimisation condition of microhardness on Ni-YSZ cermet coating hardness property by varying heat treatment parameters. Practical implications The optimisation condition obtained might only applicable to the electroless Ni-YSZ cermet coating with similar electroless nickel solution and treatments. Originality/value The value of this work is the heat treatment parametric optimisation to obtain high microhardness on electroless Ni-YSZ cermet coating by using the design of experiment 3-level full factorial.
Źródło:: Journal of Achievements in Materials and Manufacturing Engineering; 2022, 112, 1; 33--41
1734-8412
Pojawia się w:: Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 26.

Tytuł:: Possibilities of applying Ti (C, N) coatings on prosthetic elements : research with the use of human endothelial cells
Autorzy:: Banaszek, K.
Wiktorowska-Owczarek, A.
Kowalczyk, E.
Klimek, L.
Powiązania:: https://bibliotekanauki.pl/articles/306892.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: materiały stomatologiczne
stopy stomatologiczne
węglikoazotki tytanu
powłoka
cellviability
microvascular endothelial cells
Ni-Cr
dental alloys
titanium carbonitride
Ti(C, N)
coating
Opis:: Purpose: The aim of our study was to examine the effect of prosthetic alloys with Ti (C, N) coatings on viability and pro life ration of human cells employing an MTT assay with the use of human microvascular endothelial cells derived from the skin – HMEC-1 (Human Microvascular Endothelial Cells-1). Methods: Cylindrical shape samples made of Ni-Cralloy were divided into S1-S5 groups and coated with Ti (C, N) layers with different content of C and N. S0 group – control group without layer. The alloys (S0-S5) were stored in an experimental medium (MCDB131 with antibiotics) for 30 days and then HMEC-1 cells were incubated in the alloy extract for 24 and 96 hours. Next, cell viability was determined using MTT method. Results: In the case of samples incubated for both 24 and 96 hours there are statistically significant differences (with p-value <0.05) between the uncoated samples (S0 group) and all the other Ti (C, N) coated samples. Higher absorbance values were observed in all coated groups than in the control S0 group, where cell growth was statistically significantly lower. Conclusions: During incubation of endothelial cells with coated samples the number of cells was significantly bigger than the number with uncoated alloys. The best viability of cells was obtained from the S = 3 (with 51.94% at. Ti, 28.22% at. C and 19.84% at. N) group of samples. Ti (C, N) coatings may be applied as protective components on prosthetic elements made of base metal alloys.
Źródło:: Acta of Bioengineering and Biomechanics; 2016, 18, 1; 129-136
1509-409X
2450-6303
Pojawia się w:: Acta of Bioengineering and Biomechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 27.

Tytuł:: D-gun Sprayed Fe-Al Single Particle Solidification
Krystalizacja pojedynczej cząstki Fe-Al naniesionej metodą detonacyjną
Autorzy:: Wołczyński, W.
Senderowski, C.
Morgiel, J.
Garzeł, G.
Powiązania:: https://bibliotekanauki.pl/articles/352240.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Fe-Al coating
Ni-20Cr interlayer
rapid solidification
D-gun spraying
boron localization
competitive growth of phases
powłoki FeAl
międzywarstwy Ni-20Cr
szybkie krzepnięcie
metoda detonacyjna
lokalizacja boru
proces wzrostu faz
Opis:: Some Fe-Al particles less than 50 μm in diameter were deposited onto the steel substrate by means of the D-gun spraying. A solidification mechanism of an individual particle is described. The particle subjected to the description contained nominally 63 at.% Al. The description was preceded by the TEM / SAED analysis of both the Fe-Al coating and Ni-20Cr interlayer. The whole number of the analyzed particles was partially melted during the deposition. The solidification products like: amorphous phase sub-layer, oscillatory sub-layer which contains two types lamellae distributed alternately and typically non-equilibrium phase sub-layer were revealed. In the micro scale, solidification was considered as a process which occurred in two directions: towards the substrate and towards the non-melted particle part. Both solidification processes underwent the positive thermal gradients. The boron addition was localized within the eutectic precipitates pushed and then rejected by the solid/liquid interface of the solidifying non-equilibrium phase. The proposed model is a general one and therefore can be applied to other systems ;description.
Cząstki proszku Fe-Al niniejsze niż 50 μm w średnicy zostały osadzone detonacyjnie na podłożu stalowym. Opisuje się mechanizm krystalizacji pojedynczej cząstki. Cząstki poddane opisowi zawierały nominalnie 63 aL% Al. Opis poprzedzono badaniami struktury metodą TEM / SAED dotyczącymi zarówno powłoki Fe-Al jak i między warstwy Ni-20Cr. Wszystkie analizowane cząstki były częściowo nadtopione podczas osadzania. Zidentyfikowano produkty krystalizacji takie jak: podwarstwę amorficzną, podwarstwę oscylacyjną zawierającą periodycznie ułożone pły tki dwu faz oraz podwarstwę zawierającą fazę typowo nierównowagową. W mikroskali proces wzrostu faz jest analizowany jako zachodzący w dwu kierunkach: w stronę podłoża i w stronę niestopionej części cząstki. Obydwa procesy wzrostu zachodziły w obecności dodatniego gradientu temperatury. Bor dodany do powłoki został zlokalizowany w eutektyce odepchniętej przez front krystalizacji fazy typowo nierównowagowej. Proponowany model ma charakter ogólny i może być zastosowany do opisu innych systemów.
Źródło:: Archives of Metallurgy and Materials; 2014, 59, 1; 211-220
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Microstructure and oxidation resistance of an aluminide coating on the nickel based superalloy Mar M247 deposited by the CVD aluminizing process
Mikrostruktura i żaroodporność warstwy aluminidkowej wytworzonej metodą CVD na podłożu nadstopu niklu Mar M247
Autorzy:: Zielińska, M.
Zagula-Yavorska, M.
Sieniawski, J.
Filip, R.
Powiązania:: https://bibliotekanauki.pl/articles/354660.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Mar M247 Ni-base superalloy
CVD method
aluminide coating
oxidation resistance
nadstop niklu MAR M247
metoda CVD
powłoka aluminidkowa
odporność na utlenianie
Opis:: An investigation was conducted to synthesize βNiAl coating on the nickel based superalloy Mar M247 in a chemical vapor deposition process (CVD). The low activity process of aluminizing was carried out for 8 hours at the temperature 1050°C. Surface morphology and cross-section microstructure of the diffusion coating were studied and compared by using an optical microscope, a scanning electron microscope (SEM) equipped with energy dispersive spectroscopy and an X-ray diffractometer. It was found that aluminide coating with the thickness of 37 μm consisted of two layers: an outer one and the inner interdiffusion one. The outer layer consists of single phase βNiAl. The inner one, consisted of βNiAl phase and carbides: MC and M₂₃ C₆ types which were originally present in the substrate. Cyclic oxidation test was performed at 1000°C for 1000h in the air atmosphere. The aluminized samples exhibited a small mass increase and the α- Al₂ O₃ oxide formed during oxidation test had a good adherence to the coating. The decrease of aluminum content in the coating with the prolongation of the oxidation time and the phase transformation of βNiAl to γ’ Ni₃ Al and to γNi solid solution were observed. The samples without the coating showed a strong mass decrease in comparison to the coated samples.
Niskoaktywny proces aluminiowania prowadzono w temperaturze 1050°C i w czasie 8 h. Badania mikrostruktury na przekroju oraz powierzchni warstwy dyfuzyjnej prowadzono za pomoca mikroskopu optycznego oraz skaningowego mikroskopu elektronowego wyposażonego w detektor EDS. Skład fazowy określano metodą rentgenowskiej analizy fazowej. Uzyskano warstwę aluminidkową o grubości 37 μm składająca się z dwóch stref: zewnętrznej oraz wewnętrznej (dyfuzyjnej). Strefa zewnętrzna składa się z fazy βNiAl. Natomiast wewnętrzna - z fazy βNiAl oraz węglików typu MC oraz M₂₃C₆. Badania cyklicznego utleniania prowadzono w temperaturze 1000°C i w czasie 1000 h w atmosferze powietrza. Podczas utleniania warstwy aluminidkowej powstaje tlenek α-Al₂O₃ o dobrej przyczepności do warstwy dyfuzyjnej. Zwiększenie czasu utleniania od o do 1000 h powoduje zmniejszenie zawartości aluminium oraz przemianę fazową β-NiAl do γ’-Ni₃Al i do stałego roztworu γ-Ni. Materiał bez warstwy aluminidkowej charakteryzuje się większą szybkością utleniania w porównaniu do materiału z warstwą aluminidkową.
Źródło:: Archives of Metallurgy and Materials; 2013, 58, 3; 697-701
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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