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Wyszukujesz frazę "Coating" wg kryterium: Temat


Tytuł:
Wear Characteristics of FeW/FeW-B4C Coatings Produced by TIG Process
Autorzy:
Islak, S.
Powiązania:
https://bibliotekanauki.pl/articles/351663.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
wear
coating
microstructure
TIG process
Opis:
In this study, wear properties of FeW-B4C coatings produced by tungsten inert gas (TIG) process on the AISI 1060 steel were investigated. TIG process was selected because it is a cost-effective approach for melting-based coatings. The treated surfaces were evaluated and characterized by means of scanning electron microscope (SEM), X-ray diffraction analysis, and electron dispersive spectrometry (EDS). The microhardness and wear experiment were also performed by using a microhardness machine and ball-on-disk tribometer. SEM observations showed that the obtained coating had a smooth and uniform surface. According to XRD analysis, borides and carbides phases formed in the coatings. The wear behavior of the coatings was compared with ball-on-disc configuration wear tests, at the same conditions. Average coefficient of friction values of the coatings were obtained at relatively low levels.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 4; 2001-2006
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of repainting on the mechanical properties, surface topography and microstructure of polyester powder coatings
Autorzy:
Szala, M.
Kot, E. A.
Powiązania:
https://bibliotekanauki.pl/articles/102931.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
electrostatic powder spraying
microstructure
polyester resin
organic coating
mechanical properties
repainting
roughness parameter
powder coating
Opis:
The literature does not provide a systematic analysis of the effect of electrostatic powder coating repainting of structural and constructional aluminum elements on their technological parameters. It is industrial practice that worn or damaged coatings be repainted. It is crucial to determine the effect of electrostatic sprayed coatings repainting on their microstructure, roughness and mechanical properties. The aim of the work is to determinate the influence of repainting of powder deposited polyester coatings on their mechanical properties, roughness and microstructure. This study examined three different electrostatic spray epoxy coatings with matt, silk gloss and fine structure-matt finish. Test panels were prepared as single- and double-layer paint coatings on the aluminum alloy 6060 substrate. Hence, six test sets of coatings were deposited. Each set contained six samples. The microstructure of the cross section of coating was investigated by scanning electron microscopy (SEM) and light optical microscopy (metallographic and stereoscopy microscope). The chemical composition of coating was analyzed by the SEM-EDS method. The 2D surface roughness of single- and double-layer coatings and 3D surface topography maps were examined using a profile measurement gauge. The mechanical properties of coatings were measured by cupping, bending, impact, adhesion to substrate tests run according to standard procedures. As a result, the influence of repainting of polyester powder coatings on their properties was determined. The results demonstrate that repainting has no effect on the microstructure and coating adhesion to substrate as well as the bending test results and roughness of matt and silk gloss coatings. It has been found that repainting affects the results of impact and cupping tests as well as the roughness of samples with fine structure surface finish.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 2; 159-165
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of boron on micro structure and microhardness properties of Mo-Si-B based coatings produced viatig process
Autorzy:
Islak, S.
Özorak, C.
Sezgin, C. T.
Akkaş, M.
Powiązania:
https://bibliotekanauki.pl/articles/355695.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Mo-Si-B coating
microstructure
microhardness
TIG
Opis:
In this study, Mo-Si-B based coatings were produced using tungsten inert gas (TIG) process on the medium carbon steel because the physical, chemical, and mechanical properties of these alloys are particularly favourable for high-temperature structural applications. It is aimed to investigate of microstructure and microhardness properties of Mo-Si-B based coatings. Optical microscopy (OM), X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to characterize the microstructures of Mo-Si-B based coatings. The XRD results showed that microstructure of Mo-Si-B coating consists of α-Mo, α-Fe, Mo2B, Mo3Si and Mo5SiB2 phases. It was reported that the grains in the niicrostructure were finer with increasing amounts of boron which caused to occur phase precipitations in the grain boundary. Besides, the average microhardness of coatings changed between 735 HV0.3 and 1140 HV0.3 depending on boron content.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 3; 1515-1520
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Ultraviolet Absorber on Photo-Degradation of Epoxy Coating Studied by Slow Positron Beam
Autorzy:
Wang, Zheng
Liu, Fuwei
Li, Jingjing
He, Chunqing
Peng, Xiangyang
Huang, Zhen
Fang, Pengfei
Powiązania:
https://bibliotekanauki.pl/articles/1033239.pdf
Data publikacji:
2017-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
epoxy coating
photo-degradation
ultraviolet absorber
slow positron beam
microstructure
Opis:
The photo-degradation progress of epoxy coating and the effect of ultraviolet absorber under UV-B irradiation have been investigated in slow positron beam and by the Fourier transform infrared spectrometer. After 120 h of irradiation, the value of S parameter in sample bulk is reduced while compared with the virgin sample. The result is mostly due to post-cure process happening in this initial irradiation stage. As the irradiation time increases to 360 h, the S parameter decreases sharply. This is due to the growth of carbonyl group and the generation of free radical. After 528 h or longer time of irradiation, a very low S value was obtained near sample surface, indicating the formation of a dead surface layer. Positron results also reveal that the addition of ultraviolet absorber suppresses the development of the dead layer after long-term UV-B irradiation. Ultraviolet absorber has a suppressing effect on generation of polar groups towards sample bulk. The addition of ultraviolet absorber is a key factor that affects the photo-degradation of epoxy coating.
Źródło:
Acta Physica Polonica A; 2017, 132, 5; 1523-1526
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mikrostruktura, mikrotwardość i odporność na zużycie powłok typu "duplex" (Cr,Si)N/TiN na płytkach skrawających z WC
Microstructure, microhardness and wear resistance of "duplex" type (Cr,Si)N/TiN coatings deposited on WC cutting plates
Autorzy:
Morgiel, J.
Grzonka, J.
Mania, R.
Zimowski, S.
Dąbrowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/258138.pdf
Data publikacji:
2008
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
Tematy:
azotek chromu
mikrostruktura
powłoka (Cr,Si)N
powłoka pseudo-duplex
rozpylanie magnetronowe
chromium nitride
microstructure
(Cr,Si)N coating
pseudo-duplex coating
magnetron sputtering
Opis:
W pracy przedstawiono wyniki badań mikrostruktury i właściwości mechanicznych powłok typu "duplex" w układzie z wierzchnią (Cr,Si)N (~1 žm) i buforową warstwą TiN (~4 žm), osadzanych na płytkach z węglików spiekanych. Powłoka (Cr,Si)N była nanoszona przy użyciu magnetronu planarnego WMK-50 z wykorzystaniem targetów ze spieków CrSi (do 5% at. Si), a TiN metodą łukową na stanowisku PUSK-83. Obserwacje mikrostruktury wykazały, że powłoki (Cr,Si)N mają bardziej drobnokrystaliczną, kolumnową budowę od nanoszonych w takich samych warunkach powłok CrN. Badania właściwości mechanicznych pozwoliły stwierdzić, że mikrotwardość powłok (Cr,Si)N/TiN przy obciążeniu 20 i 10 mN mieści się w zakresie 24-29 GPa. Badania zużycia powłok w teście "ball on disc", tj. poprzez pomiar wytarcia powierzchni w niesmarowanym styku kula-płaszczyzna wykazały ich odporność zbliżoną do powłok CrN czy TiN. Natomiast badania eksploatacyjne powłok (Cr,Si)N/TiN na płytkach skrawających z WC prowadzone z chłodzeniem emulsją wykazały, że umożliwiają one prawie dwukrotny wzrost trwałości narzędzia w warunkach frezowania oraz czterokrotny w warunkach toczenia. Narzędzia z powłoką typu "duplex" (Cr,Si)N/TiN umożliwiają nawet toczenie materiału bez chłodzenia.
The microstructure and mechanical properties of duplex type (Cr,Si)N/TiN coatings on WC cutting plates were investigated. The hard (Cr,Si)N layer of ~1 žm thickness was deposited using WMK-50 planar magnetron equipped with CrSi (Si < 5 at.%) targets. The buffer TiN layer of 4 žm thickness was deposited using PUSK-83 Arc system. The transmission electron microscopy observations indicated, that all (Cr,Si)N coatings are characterised by columnar microstructure built of much finer crystallites than the CrN one. The microhardness of (Cr,Si)N/TiN estimated using 20-10 mN load showed some scatter within to 24-29 GPa range. The coatings wear resistance analysed with ball-on-disc test showed, that they are comparable with TiN and CrN ones. However, the test by work showed that the (Cr,Si)N/TiN duplex coated WC cutting plates cooled with emulsion show two times and four times longer lifetime in milling and turning processes, respectively, as compared with non-coated plates. The (Cr,Si)N/TiN duplex coated plates also allow dry cutting with reasonable tool lifetime.
Źródło:
Problemy Eksploatacji; 2008, 4; 123-136
1232-9312
Pojawia się w:
Problemy Eksploatacji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of the Process Parameters on the Microstructure of a Hardfacing Coating Elaborated by Hot Isostatic Pressing
Autorzy:
Tellier, A.
Ardigo-Besnard, M. R.
Chateau-Cornu, J.-P.
Powiązania:
https://bibliotekanauki.pl/articles/355976.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
powder metallurgy
hot isostatic pressing
high carbon steel
microstructure
hardfacing coating
Opis:
Hot Isostatic Pressing elaboration of Norem02, an austenitic-ferritic hypereutectoid stainless steel, leads to the formation of an austenitic matrix with a mixture of acicular M7 C3 and globular M23 C6 carbides. The sintering tests, carried out by using an AISI 304L container, showed that the final microstructure and the carbides’ distribution of the HIPed Norem02 are strongly influenced by the process parameters (heating and cooling rate, sintering time, holding temperature and pressure) and by the particles’ size, microstructure and phase distribution of the initial powder. The morphological, crystallographic and chemical analysis of the sintered samples were completed by comprehension of the diffusion phenomena at the Norem02/304L interface, enabling the establishment of a correlation between elaboration process and final microstructure.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 1; 33-38
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microstructural Characterization of Ni-Based B4C Reinforced Composite Coating Produced by Tungsten Inert Gas Method
Autorzy:
Kılıç, Musa
Powiązania:
https://bibliotekanauki.pl/articles/2049407.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
coating
NiCrBSi-B4C
Cr7C3
microstructure
microhardness
Opis:
In this study, NiCrBSi-B4C (wt. %5, %10 ve %15 B4C) powder mixtures are coated on the stainless steel surface of AISI304 by tungsten inert gas (TIG) method. We use optic microscope and scanning electron microscope (SEM) for the coating layer analysis, energy dispersive spectrometry (EDS) for element distribution analysis and X-ray diffractogram (XRD) for the analysis of phase components. The measurements of hardness are determined by the microhardness tester. Based on the results obtained by the examination of microstructure and phases, it has been observed that while B and C elemets are more intense in the middle and upper parts of the coating layer, the parts close to the interface have a higher intensity of Ni and Fe. Moreover, there are phases such as Cr7C3, γ – Ni, CrFeB, Ni3B, CrB ve Fe2B are formed in the coating layer. The increasing ratio of B4C results in increasing on the measurement values of microhardness. The maximum hardness value (430,8 HV0.2) is obtained from the coating layer of S4 sample while the minimum value (366,9 HV0.2) is observed from the NiCrBSi coated sample
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 3; 917-924
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
Tytuł:
Właściwości tribologiczne powłok węglikowo-ceramicznych nanoszonych obróbką elektroiskrową
Tribological properties of the electro-spark deposited tungsten carbide-ceramic coatings
Autorzy:
Radek, N.
Bilska, I.
Antoszewski, K.
Pietraszek, J.
Powiązania:
https://bibliotekanauki.pl/articles/971561.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
obróbka elektroiskrowa
powłoka
tribologia
mikrostruktura
przyczepność
electro-spark deposition
coating
tribology
microstructure
adhesion
Opis:
W artykule przedstawiono wyniki badań właściwości powłok nanoszonych elektroiskrowo. Ocenę właściwości przeprowadzono na podstawie obserwacji mikrostruktury, pomiarów przyczepności oraz badań tribologicznych i aplikacyjnych. Badania przeprowadzono, wykorzystując elektrody WC-Co-Al2O3 oraz WC-Co-Al2O3/3TiO2, które zostały wytworzone poprzez spiekanie nanostrukturalnych proszków. Przeciwzużyciowe powłoki zostały naniesione elektroiskrowo na próbki ze stali C45 za pomocą urządzenia EIL-8A. Ze względu na swoje właściwości powłoki tego typu mogą być stosowane w ślizgowych węzłach tarcia oraz jako powłoki ochronne.
The process of material growth resulting from electroerosion is known as electro-spark alloying (ESA) or electro-spark deposition (ESD). The erosion of the anode and the spark discharges between the electrodes result in the formation of a surface layer with properties different from those of the base material. The processes of coating formation on metal parts, including electrospark deposition, involve mass and energy transport accompanied by chemical, electrochemical, and electrothermal reactions. Today, different electro-spark deposition techniques are used. They are suitable for coating formation and surface microgeometry formation. The paper is concerned with the performance properties of electrospark deposited coatings, which were determined using tribological and microstructural analysis, measuring the bonding strength and application tests. The studies were conducted using WC-Co-Al2O3 and WC-Co- Al2O3/3TiO2 electrodes produced by sintering nanostructural powders. The anti-wear coatings were electro-spark deposited over C45 carbon steel by means of an EIL-8A. These coatings are likely to be applied in sliding friction pairs and as protective coatings.
Źródło:
Tribologia; 2014, 4; 93-103
0208-7774
Pojawia się w:
Tribologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The microstructure and selected mechanical properties of Al2O3 + 3 wt.% TiO2 plasma sprayed coatings
Mikrostruktura i wybrane właściwości mechaniczne powłok Al2O3 + 3% wag. TiO2 natryskiwanych plazmowo
Autorzy:
Michalak, Monika
Łatka, Leszek
Sokołowski, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/115101.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
natryskiwanie plazmowe
powłoka
mikrostruktura
porowatość
mikrotwardość
chropowatość
plasma spraying
coating
microstructure
porosity
microhardness
roughness
Opis:
The Al2O3+TiO2 coatings are of the interest of surface engineering due to their high hardness and wear resistance but also increased toughness, when compared to pure Al2O3 ones. This article describes the deposition of Al2O3+3 wt.% TiO2 coatings by Atmospheric Plasma Spraying (APS) technique. The commercial AMI 6300.1 powder (-45 + 22 μm) was used as a feedstock. The 2k+1 spraying experiment, based on two variables, namely spray distance and torch velocity, was designed. The samples were characterized in the terms of morphology, microstructure, microhardness and roughness. It was observed that the shorter spray distance resulted in lower porosity, higher microhardness and lower roughness of coatings.
Powłoki Al2O3+TiO cieszą się zainteresowaniem inżynierii powierzchni ze względu na wysoką twardość i odporność na zużycie ścierne przy jednocześnie zwiększonej odporności na kruche pękanie, w porównaniu z powłokami na bazie czystego Al2O3. W artykule opisano proces natryskiwania powłok Al2O3+3% wag. TiO2 metodą proszkowego natryskiwania plazmowego (APS). Jako materiał wsadowy wykorzystano komercyjnie dostępny proszek AMI 6300.1 (-45+22 μm). Zaprojektowano plan eksperymentu 2k+1, oparty na dwóch zmiennych - odległości natryskiwania i prędkości przesuwu palnika względem podłoża. Próbki charakteryzowano pod względem morfologii, mikrostruktury, mikrotwardości oraz chropowatości. Zaobserwowano, że zmniejszenie odległości natryskiwania pozwala uzyskać powłoki o mniejszej porowatości, większej twardości i niższej chropowatości.
Źródło:
Welding Technology Review; 2019, 91, 6; 39-45
0033-2364
2449-7959
Pojawia się w:
Welding Technology Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research into morphology and properties of TiO2 – NiAl atmospheric plasma sprayed coating
Autorzy:
Maruszczyk, A.
Dudek, A.
Szala, M.
Powiązania:
https://bibliotekanauki.pl/articles/102426.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
microstructure
titania
TiO2–NiAl
atmospheric plasma spray
TiO2 coating
lamellae
microhardness
porosity
Opis:
Titania (TiO2) based coatings are ceramic products with unique properties that make them widely applicable (e.g. in automotive industry, optoelectronics, chemical processing or medicine). Atmospheric plasma spray process enables to deposit TiO2 with addition of NiAl feedstock material which has an influence on coating cohesion and adhesion to substrate. However, the literature and technical notes give little information about parameters of spraying of TiO2-10 wt.% NiAl feedstock powders enables producing coating without nonuniformities including cracks and delamination form substrate. The aim of the work was to verify the parameters of plasma spraying by evaluation of the morphology and properties of manufactured the TiO2-10 wt.% NiAl coatings. Titania based coatings were deposited by means of atmospheric plasma sprayed on steel substrate using TiO2-10 wt.% NiAl feedstock powders. Morphology and microstructure were examined using light optical microscope (LOM) and scanning electron microscope (SEM). Coating chemical composition were analysed by means of SEM-EDS method. Coating surface topography and Knoop microhardness were determined. Porosity and thickness were evaluated by using quantities image analysis programme. Plasma spraying parameters used in our research allow to obtain uniform coating without cracks and delamination at coating-substrate interface. It acknowledges that uniformity of coating technological properties as well manufactured coatings can be put to wear tests, such as high temperature oxidation, corrosion, erosion or cavitation erosion resistance evaluation.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 3; 204-210
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative Analysis of Mechanical Properties of WC-based Cermet Coatings Sprayed by HVOF onto AZ31 Magnesium Alloy Substrates
Autorzy:
Jonda, Ewa
Łatka, Leszek
Powiązania:
https://bibliotekanauki.pl/articles/2024046.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
mechanical properties
microstructure
fracture toughness
indentation test
cermet coating
HVOF spraying
magnesium alloy AZ31
Opis:
Magnesium alloys are very interesting engineering materials due to their very high strength to density ratio (the best among metallic alloys). However, because of low hardness as well as low resistance against erosion, abrasion and corrosion, their applications in the industry is very limited. In order to improve mechanical performances, deposition of hardening coating by thermal spraying was proposed. In this work, the WC-based coatings with different binder (Co or Ni) and co-hardening additives (Cr or Cr3C2) manufactured by high velocity oxy-fuel (HVOF) were studied. These coatings were deposited onto AZ31 magnesium alloy. The crucial problem is obtaining good-adhered coating without damage the substrate, because of relatively low temperature resistance of magnesium alloys (about 300 °C). To solve this problem, HVOF method, which is low temperature and high velocity, was proposed. Also an important role plays process parameters (e.g. spray distance, fuel medium, type of nozzle). The goal of the study was to compare three types of cermet coatings manufactured from commercially available powders (WC-Co, WC-Co-Cr and WC-Cr3C2-Ni) in terms of their microstructure features, microhardness, instrumented indentation and fracture toughness. Results revealed that selected process parameters made it possible to obtain well-adhered coating with good fulfillment of the surface unevenness of the AZ31 substrate. The most noticeable effect was influence of cobalt matrix on higher hardness (1.4 – 1.6 GPa) and Young modulus (330 – 340 GPa) of deposited coatings in compare to the nickel matrix ones (1.2 GPa and 305 GPa, respectively). The same trend was observed in case of fracture toughness, c.a. 6.5 MPa·m1/2 for Co-matrix and 4.9 MPa·m1/2 for Ni-matrix
Źródło:
Advances in Science and Technology. Research Journal; 2021, 15, 2; 57-64
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
Tytuł:
A Comparison of Tribological Performances of Al2O3 and Al2O3 + 40 WT. % Tio2 Coatings Manufactured by Atmospheric Plasma Spraying
Porównanie właściwości tribologicznych powłok Al2o3 oraz Al2o3 + 40% wag . Tio2 wytworzonych metodą atmosferycznego natryskiwania plazmowego
Autorzy:
Niemiec, Aneta
Michalak, Monika
Łatka, Leszek
Sokołowski, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/188153.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
plasma spraying
coating
microstructure
wear resistance
microhardness
natryskiwanie plazmowe
powłoka
mikrostruktura
odporność na zużycie ścierne
mikrotwardość
Opis:
In this paper, the results of tribological, microscopic and mechanical research of Al2O3 and Al2O3 + 40 wt.% TiO2 coatings manufactured by atmospheric plasma spraying (APS) were presented. The feedstock materials were Al2O3 (Metco 6103, Oerlikon Metco) and Al2O3 + 40 wt.% TiO2 (Metco 131VF, Oerlikon Metco) powders with the average grain size of 30 μm. The stainless steel (X5CrNi18-10) coupons had a diameter equal to 25 mm and 2 mm of thickness. The morphology and microstructure of obtained coatings were tested by scanning electron microscope (SEM). Then adhesion tests and tribological examinations by ball-on-disc (BoD) mode in technical dry friction conditions were carried out. During BoD testing, the load of 5 N was used. It was concluded that the Al2O3 coating was characterized by higher wear resistance and microhardness, but, at the same time, it was of lower fracture toughness than the Al2O3 + 40 wt.% TiO2 coating.
W artykule przedstawiono wyniki badań tribologicznych, mikroskopowych oraz mechanicznych powłok Al2O3 oraz Al2O3 + 40% wag. TiO2, natryskanych metodą atmosferycznego natryskiwania cieplnego (APS). Materiałem na powłoki były proszki Al2O3 (Metco 6103, Oerlikon Metco) oraz Al2O3 + 40% wag. TiO2 (Metco 131VF, Oerlikon Metco) o średniej wielkości cząstek wynoszącej 30 μm. Jako podłoże zostały użyte krążki ze stali austenitycznej X5CrNi18-10 o średnicy 25 mm i grubości 2 mm. Morfologię i mikrostrukturę uzyskanych powłok oceniono przy pomocy skaningowego mikroskopu elektronowego (SEM). Po określeniu przyczepności powłok wykonano badania tribologiczne w styku kula–tarcza w warunkach tarcia technicznie suchego. Zastosowano obciążenie 5 N. Na podstawie przeprowadzonych badań stwierdzono, że powłoki na bazie Al2O3 wykazują większą odporność na zużycie ścierne oraz wyższą mikrotwardość, ale jednocześnie mniejszą odporność na kruche pękanie (KIC) w porównaniu z powłokami na bazie Al2O3 + 40% wag. TiO2.
Źródło:
Tribologia; 2019, 286, 4; 63-71
0208-7774
Pojawia się w:
Tribologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of microstructure of arc sprayed coatings on wear resistance
Autorzy:
Majewski, Daniel
Hejwowski, Tadeusz
Łukasik, Daniel
Powiązania:
https://bibliotekanauki.pl/articles/102436.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
microstructure
microhardness
wear resistance
sprayed coating
quantitative metallography
mikrostruktura
mikrotwardość
odporność na zużycie
powłoka natryskowa
metalografia ilościowa
Opis:
The paper presents the test results of microstructure and resistance to abrasion and erosive wear of single and double-layer coatings with arc-coated powder wires on the iron matrix. It was shown that adhesion of coatings is in the range of 14.39 – 24.72 MPa. The closed porosity of the coatings determined from SEM images is in the range of 0.69 – 2.45% and was significantly lower than the porosity determined from the images obtained from the optical microscope, which was 5.49 – 8.11%. The 95 MXC coating’s hardness of the matrix was about 100HV0.05 higher compared to the AMI 100 coating matrix. The intensity of the erosion of AMI 100 coatings was lower than the intensity of the erosion of 95 MXC coatings.
Źródło:
Advances in Science and Technology. Research Journal; 2018, 12, 1; 285-292
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł

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