Temat: powders - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The influence of prosthetic elements manufacturing technology on properties and microstructure shaping Co-Cr-Mo alloys
Autorzy:: Augustyn-Nadzieja, Joanna
Szczotok, Agnieszka
Powiązania:: https://bibliotekanauki.pl/articles/1844979.pdf
Data publikacji:: 2020
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:: Co-Cr-Mo alloys
dental prosthetics
lost wax casting method
selective laser sintering of metal powders (DLMS)
microstructure
hardness
Opis:: The presented publication discusses the test results regarding samples of a prosthetic alloy from the Co-Cr-Mo system. The test samples were obtained by means of two different methods applied in prosthetics laboratories to compare their properties and microstructure. To obtain the samples via the traditional lost wax casting method, the cast alloy Co-Cr-Mo was used, commercially known as Wironit LA. In the case of the modern technique DMLS (Direct Metal Laser Sintering), metallic powder Co-Cr-Mo, called EOS Cobalt Chrome MP1, was used. The samples of both Co-Cr-Mo alloys obtained via the two methods were prepared for metallographic tests; they also underwent microstructural observations with the use of light microscopy (LM) and scanning electron microscopy (SEM), and next they were subjected to hardness tests. The obtained samples demonstrated a dendritic structure. In the samples cast with the lost wax casting method, a segregation of the chemical composition was revealed. The samples obtained by means of the DLMS method were characterized by chemical composition homogeneity. The hardness measurements with the statistical analysis of the measurement results showed a difference between the examined alloys. On the basis of the performed studies, it was stated that the applied methods of manufacturing prosthetic elements make it possible to obtain diversified microstructural and mechanical properties of the alloys. The hardness value significantly affects the subsequent mechanical and finishing treatment of prosthetic elements, such as metal bases of crown caps, bridges, mobile prostheses or other retention elements.
Źródło:: Engineering of Biomaterials; 2020, 23, 156; 24-31
1429-7248
Pojawia się w:: Engineering of Biomaterials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Synthesis Of SiC/Cu Composite Powders From Polycarbosilane And Cupric Nitrate Trihydrate
Synteza kompozytowych proszków SiC/Cu z polikarbosilanu i trihydratu azotanu miedzi(II)
Autorzy:: Bang, R.-S.
Yim, D.-M.
Riu, D.-H.
Oh, S.-T.
Powiązania:: https://bibliotekanauki.pl/articles/355685.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Cu/SiC composite powders
polycarbosilane
Cu-nitrate
microstructure
proszki kompozytowe Cu/SiC
polikarbosilan
azotan miedzi
mikrostruktura
Opis:: SiC/Cu composite powders with the barrier coating of SiC-Al onto SiC powders were synthesized from Al-containing polycarbosilane precursor and Cu-nitrate hydrate. Curing at 200°C and high temperature pyrolysis at 1600°C was used to achieve the crystallization of precursor, forming the SiC-Al coating on the surface of SiC powders. A core-shell structure with the core of SiC and the shell of Cu was constructed by calcination and hydrogen-reduction of Cu nitrate hydrate. XRD and SEM analysis revealed that the β-SiC and 4H-SiC phases were formed on the surface of the initial α-SiC powders. Also, it was observed by EDX mapping that core powders of SiC were homogeneously surrounded with the fine Cu particles on their surface.
Źródło:: Archives of Metallurgy and Materials; 2015, 60, 2B; 1261-1263
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Platerowanie laserowe zaworów wylotowych silnika lotniczego wykonanych ze stali X53CrMnNiN 21-9
Laser plating of outlet valves of aero-engine made of X53CrMnNiN 21-9 steel
Autorzy:: Bogdanowicz, Z.
Napadłek, W.
Grzelak, J.
Powiązania:: https://bibliotekanauki.pl/articles/208455.pdf
Data publikacji:: 2006
Wydawca:: Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:: stal zaworowa X53CrMnNiN 21-9
proszki stellitowe
platerowanie laserowe
X53CrMnNiN 21-9 valvular steel
stellit powders
laser plating
Opis:: W pracy przedstawiono metodę laserowego napawania stali zaworowej oraz zaworów silnika spalinowego, zbadano morfologię stosowanych proszków do napawania oraz określono podstawowe właściwości użytkowe napawanych warstw.
The paper presents a method of laser pad welding of a valve steel and a combustion engine valves. Morphology of the powders used for plating was examined as well as basic useful properties of the padded layers were determined.
Źródło:: Biuletyn Wojskowej Akademii Technicznej; 2006, 55, 4; 127-138
1234-5865
Pojawia się w:: Biuletyn Wojskowej Akademii Technicznej
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Selection parameters overlaying welding laser steel powders chromium and nichrome with make use of the diode laser large power
Dobór parametrów natapiania laserowego stali proszkami chromu i nichromu z wykorzystaniem lasera diodowego dużej mocy
Autorzy:: Bogdanowicz, Z.
Grzelak, K.
Kowalczyk, S.
Powiązania:: https://bibliotekanauki.pl/articles/243142.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: laser diodowy
proszki metalu
natapianie warstw
struktura
właściwości
diode laser
metal powders
surfacing by welding
structure
properties
Opis:: This work presents the results of research concerning the influence of parameters laser process melting the surface layer using powder of metal as a welding material. Facing by welding test were conducted on high-quality carbon steel commonly used on vehicles elements and on austenitic steel used on combustion engines elements. The powder of chromium of chemical constitution 99 percent Cr and powder of nichrome of chemical constitution 75 percent Ni, 20 percent Cr, 5 percent Al were used in this research. The process of the overlaying by welding was conducted with the use of HDPL diode laser of large power. Facing by welding process variables are: power of laser beam and quantity of passed powder. The results of influence of these parameters on shape and geometrical properties created layer are presented on graphs, which were based on metallographic pictures of microsection metallographic. The research for chosen samples was conducted on microhardness as well as analysis of structure obtained surfaces. The analysis of results of microhardness measurement permits to affirm the considerable growth of hardness of obtained surface in case of welding the surfaces by powder Cr as well as the fall of hardness in case of using the powder nicr in relation to the base material. The observation of microstructure showed the dendritic structure after surfaces by welding Cr and hardening the base material (steel 45) as a result of influence of the laser beam. The analysis of microstructure after surfaces by welding nicr showed the considerable porosity as well as a small influence on the structure of the base material, presented by an insignificant growth of crystallites in weld interface (the austenitic steel).
W pracy opisano wyniki badań wpływu parametrów procesu laserowego przetapiania warstwy wierzchniej z użyciem, jako materiału natapianego, proszku metalu. W badaniach użyto proszku chromu o składzie 99%Cr oraz proszku ni-chromu o składzie 75%Ni, 20%Cr, 5%Al. Próby natapiania przeprowadzono na stali węglowej wyższej jakości, powszechnie stosowanej na elementy pojazdów mechanicznych oraz na stali austenitycznej wykorzystywanej na niektóre elementy silników pojazdów samochodowych. Proces natapiania przeprowadzono z użyciem lasera diodowego dużej mocy HDPL. Zmiennymi w procesie napawania były: moc wiązki lasera oraz ilość podawanego proszku. Wyniki wpływu tych parametrów na kształt i właściwości geometryczne utworzonej warstwy przedstawiono w postaci wykresów, na podstawie zdjęć metalograficznych zgładów poprzecznych wykonanych próbek. Dla wybranych próbek przeprowadzono badania mikrotwardości oraz analizę struktury uzyskanych warstw. Analiza wyników pomiaru mikrotwardości pozwala stwierdzić znaczny wzrost twardości uzyskanej warstwy w wypadku natapiania proszkiem Cr oraz spadek twardości w odniesieniu do proszku nicr w stosunku do materiału podłoża. Obserwacja mikrostruktury wykazała budowę dendrytyczną warstwy Cr oraz hartowanie materiału podłoża (stal 45) w wyniku oddziaływania wiązki lasera. Analiza mikrostruktury warstwy nicr wykazała znaczną porowatość oraz niewielki wpływ na strukturę materiału podłoża (stal austenityczna - nieznaczny rozrost ziaren w strefie przejściowej).
Źródło:: Journal of KONES; 2007, 14, 3; 73-82
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Experimental Study of the Explosion of Aluminized Explosives in Air
Autorzy:: Chen, Y.
Xu, S.
Wu, D. J.
Liu, D. B.
Powiązania:: https://bibliotekanauki.pl/articles/358676.pdf
Data publikacji:: 2016
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:: explosion in air
aluminized explosives
boron powders
TNT equivalence
fireballs
Opis:: Piezoelectric gauges were used to measure the shock wave overpressure of aluminized explosives and of a TNT charge. An infrared thermal-imaging spectrometer was used to collect the infrared signatures produced by the explosion fireball when the examined explosives were detonated. The measurement of the infrared signatures was used to estimate the surface temperatures and the dimensions of the fireball. Two aluminized explosive compositions (RDX/Al/AP and RDX/Al/B/AP) have been analyzed. 500 g charges of the aluminized explosives were prepared and studied, and their TNT equivalences were calculated according to the experimental data and the explosion law. The highest surface temperatures of the fireballs of these aluminized explosives were up to 1600 °C, which was higher than that of the TNT charge. In the region of the highest surface temperature above 700 °C, the duration for the composition RDX/Al/AP was about 232 ms (2.73 times more than TNT), whilst RDX/Al/B/AP was about 360 ms. The fireballs obtained from the explosion of these aluminized explosives had larger dimensions than that of TNT, especially when the surface temperature was above 1000 °C. The test results indicate that the addition of boron powders to aluminized explosives is a good way to enhance their blast effect, to improve the temperature of the explosion field and to prolong the duration of the higher temperature.
Źródło:: Central European Journal of Energetic Materials; 2016, 13, 1; 117-134
1733-7178
Pojawia się w:: Central European Journal of Energetic Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Improvement of Microwave Absorbance of Polymer Composites of W-Type Hexaferrite Powders by Attachment of Frequency Selective Surface
Autorzy:: Cho, H.-S.
Kim, S.-S.
Powiązania:: https://bibliotekanauki.pl/articles/352824.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: frequency selective surface
microwave absorbers
hexaferrite powders
polymer composites
Opis:: This work investigates the effect of a frequency selective surface (FSS) composed of a regular array of square loop elements on the absorption properties of grounded ferrite composites. Polymer matrix composites of CoZnW hexaferrite powders having small magnetic loss were used as the substrate material. Computational tools were used to model the interaction between electromagnetic waves and materials and determine the reflection coefficient. Reflection loss and bandwidth were greatly improved by attaching an FSS with controlled electrical resistance (R) onto the grounded ferrite composites. For the FSS with R = 800 Ω, the minimum reflection loss decreased to –25 dB at 10 GHz and the bandwidth was broadened to 7.5-12.5 GHz with respect to –10 dB reflection loss.
Źródło:: Archives of Metallurgy and Materials; 2017, 62, 2B; 1325-1328
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Wolframowe spieki ciężkie - właściwości, wytwarzanie i zastosowanie
Tungsten heavy alloys - properties, production and application
Autorzy:: Czerwińska, M.
Powiązania:: https://bibliotekanauki.pl/articles/234920.pdf
Data publikacji:: 2012
Wydawca:: Wojskowy Instytut Techniczny Uzbrojenia
Tematy:: kompozyty wolframowe
spieki ciężkie
metale ciężkie
wytwarzanie
zastosowanie
właściwości spieków
metalurgia proszków
tungsten composites
heavy sintered alloys
heavy metals
production
application
properties of sintered alloys
powders metallurgy
Opis:: Współczesna literatura wiele uwagi poświęca wytwarzaniu oraz badaniu metali ciężkich na bazie wolframu (Tungsten Heavy Alloys - WHA), który nadaje spiekom wyjątkowych właściwości. W artykule scharakteryzowano właściwości spieków ciężkich oraz współczesne możliwości zastosowań. Przestawiono proces wytwarzania kompozytów wolframowych techniką metalurgii proszków z wyjaśnieniem zjawisk, jakie zachodzą w poszczególnych etapach. Omówiono również wpływ różnych dodatków na właściwości wytwarzanych metali ciężkich.
There is a lot of contemporary literature items about production and testing heavy metals based on tungsten (Tungsten Heavy Alloys - WHA) that provides exceptional properties of sintered powders. The performance of heavy sintered metals and their capacities for application are presented in the paper. The manufacturing process of tungsten composites by the powder metallurgy technology with outlining the phenomena taking place at particular stages is presented. The influence of various additives on properties of produced heavy metals is also discussed.
Źródło:: Problemy Techniki Uzbrojenia; 2012, 41, 122; 47-56
1230-3801
Pojawia się w:: Problemy Techniki Uzbrojenia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Additive and hybrid technologies for products manufacturing using powders of metals, their alloys and ceramics
Autorzy:: Dobrzański, L. A.
Dobrzański, L. B.
Dobrzańska-Danikiewicz, A. D.
Powiązania:: https://bibliotekanauki.pl/articles/1818519.pdf
Data publikacji:: 2020
Wydawca:: Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:: powder engineering
manufacturing of powder products
hybrid technologies using powders
additive manufacturing technologies using powders
dendrological matrix of the technologies potential and attractiveness
holistic augmented Industry 4.0 model
inżynieria proszkowa
produkcja wyrobów proszkowych
technologie hybrydowe z wykorzystaniem proszków
technologie wytwarzania przyrostowego z wykorzystaniem proszków
Opis:: Purpose: The paper is a comprehensive review of the literature on additive and hybrid technologies for products manufacturing using powders of metals, their alloys and ceramics. Design/methodology/approach: Extensive literature studies on conventional powder engineering technologies have been carried out. By using knowledge engineering methods, development perspectives of individual technologies were indicated. Findings: The additive and hybrid technologies for products manufacturing using powders of metals, their alloys and ceramics as the advanced digital production (ADP) technologies are located in the two-quarters of the dendrological matrix of technologies "wide-stretching oak" and "rooted dwarf mountain pine" respectively. It proves their highest possible potential and attractiveness, as well as their fully exploited attractiveness or substantial development opportunities in this respect. Originality/value: According to augmented holistic Industry 4.0 model, many materials processing technologies and among them additive and hybrid technologies for products manufacturing using powders of metals, their alloys and ceramics are becoming very important among product manufacturing technologies. They are an essential part not only of powder engineering but also of the manufacturing development according to the concept of Industry 4.0.
Źródło:: Archives of Materials Science and Engineering; 2020, 102, 2; 59--85
1897-2764
Pojawia się w:: Archives of Materials Science and Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Fabrication Of Scaffolds From Ti6Al4V Powders Using The Computer Aided Laser Method
Wytwarzanie scaffoldów z proszków Ti6Al4V z użyciem komputerowo wspomaganej metody laserowej
Autorzy:: Dobrzański, L. A.
Dobrzańska-Danikiewicz, A. D.
Malara, P.
Gaweł, T. G.
Dobrzański, L. B.
Achtelik-Franczak, A.
Powiązania:: https://bibliotekanauki.pl/articles/351661.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: biomimetic materials
CAMD
scaffolds
SLM
Ti6Al4V powders
SEM
EDS
materiały biomimetyczne
scaffoldy
selektywne topienie laserowe
proszki Ti6Al4V
Opis:: The aim of the research, the results of which are presented in the paper, is to fabricate, by Selective Laser Melting (SLM), a metallic scaffold with Ti6Al4V powder based on a virtual model corresponding to the actual loss of a patient’s craniofacial bone. A plaster cast was made for a patient with a palate recess, and the cast was then scanned with a 3D scanner to create a virtual 3D model of a palate recess, according to which a 3D model of a solid implant was created using specialist software. The virtual 3D solid implant model was converted into a 3D porous implant model after designing an individual shape of the unit cell conditioning the size and three-dimensional shape of the scaffold pores by multiplication of unit cells. The data concerning a virtual 3D porous implant model was transferred into a selective laser melting (SLM) device and a metallic scaffold was produced from Ti6Al4V powder with this machine, which was subjected to surface treatment by chemical etching. An object with certain initially adopted assumptions, i.e. shape and geometric dimensions, was finally achieved, which perfectly matches the patient bone recesses. The scaffold created was subjected to micro-and spectroscopic examinations.
Celem badań, których wyniki zaprezentowano w artykule jest wytworzenie, metodą selektywnego topienia laserowego (SLM), scaffoldu metalowego z proszku Ti6Al4V na podstawie wirtualnego modelu odpowiadającego rzeczywistemu ubytkowi kości twarzoczaszki pacjenta. Od pacjenta z ubytkiem podniebienia pobierano wycisk gipsowy, który następnie zeskanowano za pomocą skanera 3D, w celu uzyskania wirtualnego modelu 3D ubytku podniebienia, na podstawie którego z użyciem specjalistycznego oprogramowania utworzono model 3D litego implantu. Po zaprojektowaniu indywidualnego kształtu komórki jednostkowej, determinującej wielkość i trójwymiarowy kształt porów scaffoldu, poprzez multiplikację komórek jednostkowych przekształcono wirtualny model 3D implantu litego w model 3D implantu porowatego. Dane dotyczące wirtualnego modelu 3D implantu porowatego przetransferowano do urządzenia służącego do selektywnego topienia laserowego (SLM) i z użyciem tej maszyny z proszku Ti6Al4V wytworzono metalowy scaffold, który poddano obróbce powierzchniowej poprzez trawienie chemiczne. Finalnie otrzymano obiekt o założonych na wstępie: kształcie i wymiarach geometrycznych, które idealnie odpowiadają ubytkowi kości pacjenta. Wytworzony scaffold poddano badaniom mikro i spektroskopowym.
Źródło:: Archives of Metallurgy and Materials; 2015, 60, 2A; 1065-1070
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Manufacturing powders of metals, their alloys and ceramics and the importance of conventional and additive technologies for products manufacturing in Industry 4.0 stage
Autorzy:: Dobrzański, L. A.
Dobrzański, L. B.
Dobrzańska-Danikiewicz, A. D.
Kraszewska, M.
Powiązania:: https://bibliotekanauki.pl/articles/1818518.pdf
Data publikacji:: 2020
Wydawca:: Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:: powder engineering
powders manufacturing methods
manufacturing technologies using powders
dendrological matrix of the technologies potential and attractiveness
holistic augmented Industry 4.0 model
inżynieria proszkowa
metody wytwarzania proszków
technologie wytwarzania z użyciem proszków
Opis:: Purpose: The paper is a literature review indicating the importance of powder engineering in the modern stage of Industry 4.0 development. 47 technologies for the manufacturing and use the powders of metal and their alloys and ceramic in the manufacturing of products are indicated. All those technologies were compared in terms of their potential and attractiveness, pointing to their development trends. The focus was solely on powder production methods. Other technologies will be discussed in other papers in the powder engineering cycle. Design/methodology/approach: The authors' considerations are based on an extensive literature study and the results of the authors' previous studies and empirical work. In order to compare the analyzed technologies, the methodology of knowledge engineering are used, including the own method of contextual matrices for comparative analysis of a large set of technologies by presenting them on a dendrological matrix. Findings: The most interesting intellectual achievements contained in the paper include presentations of the authors' original concepts regarding the augmentation of the Industry 4.0 model. Material processing technologies occupy an important place in it, among them powder engineering technologies, both conventional and additive. The most attractive and promising development technologies in powder engineering are identified. Originality/value: The originality of the paper is associated with the novelty of the approach to analysing powder engineering, an indication of its importance for the development of the Industry 4.0 idea, where progress does not depend only on the development of IT technologies. It is also not true that from among technologies only additive technologies play a key role. Using avant-garde analyses in the field of knowledge engineering, the most avant-garde technologies of powder engineering are pointed out.
Źródło:: Archives of Materials Science and Engineering; 2020, 102, 1; 13--41
1897-2764
Pojawia się w:: Archives of Materials Science and Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Manufacturing technologies thick-layer coatings on various substrates and manufacturing gradient materials using powders of metals, their alloys and ceramics
Autorzy:: Dobrzański, L. A.
Dobrzański, L. B.
Dobrzańska-Danikiewicz, A. D.
Powiązania:: https://bibliotekanauki.pl/articles/367488.pdf
Data publikacji:: 2020
Wydawca:: Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:: powder engineering
manufacturing of powder products
manufacturing technologies thick-layer coatings using powders
dendrological matrix of the technologies potential and attractiveness
holistic augmented Industry 4.0 model
inżynieria proszkowa
produkcja produktów proszkowych
technologie wytwarzania
powłoka grubowarstwowa
matryca dendrologiczna
przemysł 4.0
Opis:: Purpose: The paper is a comprehensive review of the literature on manufacturing technologies thick-layer coatings on various substrates and manufacturing gradient materials using powders of metals, their alloys and ceramics. Design/methodology/approach: Extensive literature studies on manufacturing technologies thick-layer coatings on various substrates and manufacturing gradient materials using powders of metals, their alloys and ceramics have been carried out. The paper is illustrated with examples of various structure images obtained as part of research of engineering materials made by authors with powders. By using knowledge engineering methods, development perspectives of individual technologies were indicated. Findings: The manufacturing technologies thick-layer coatings on various substrates and manufacturing gradient materials using powders of metals, their alloys and ceramics as the advanced digital production (ADP) technologies are proves the highest possible potential and relatively good attractiveness, as well as their fully exploited attractiveness or substantial development opportunities in this respect. Originality/value: According to augmented holistic Industry 4.0 model, many materials processing technologies and among them manufacturing technologies thick-layer coatings on various substrates and manufacturing gradient materials using powders of metals, their alloys and ceramics are becoming very important among product manufacturing technologies. They are an essential part of powder engineering.
Źródło:: Journal of Achievements in Materials and Manufacturing Engineering; 2020, 99, 1; 14-41
1734-8412
Pojawia się w:: Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Overview of conventional technologies using the powders of metals, their alloys and ceramics in Industry 4.0 stage
Autorzy:: Dobrzański, L. A.
Dobrzański, L. B.
Dobrzańska-Danikiewicz, A. D.
Powiązania:: https://bibliotekanauki.pl/articles/368149.pdf
Data publikacji:: 2020
Wydawca:: Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:: powder engineering
conventional powders manufacturing methods
powder metallurgy
liquid phase sintering
in solid-state sintering
manufacturing of powder products
holistic augmented Industry 4.0 model
inżynieria proszkowa
konwencjonalne metody wytwarzania proszków
metalurgia proszków
faza ciekła spiekania
spiekanie w fazie stałej
produkcja produktów proszkowych
przemysł 4.0
Opis:: Purpose: Among the technologies that play a crucial role in the current stage of development of Industry 4.0 conventional powder engineering technologies are of great importance. Based on a comprehensive literature review, conventional technologies using the powders of metals, their alloys and ceramics are described. Development perspectives of the most widespread among them were indicated. Design/methodology/approach: Extensive literature studies on conventional powder engineering technologies have been carried out. By using knowledge engineering methods, development perspectives of individual technologies were indicated. Findings: In addition to the presentation of conventional sintering technological methods, sintering mechanisms in solid-state and liquid phase sintering which accounts for 90% of the commercial value of sintered products are presented. Originality/value: According to augmented holistic Industry 4.0 model, many materials processing technologies and among them conventional powder engineering technologies play a key role in current industry development. For this reason, these technologies have been characterized in detail on the basis of available literature sources.
Źródło:: Journal of Achievements in Materials and Manufacturing Engineering; 2020, 98, 2; 56-85
1734-8412
Pojawia się w:: Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Wpływ wybranych parametrów laserowego napawania proszku stopów metali na stal typu C45 w aspekcie zmian twardości napoiny
The influence of selected metal powder laser cladding parameters on the C45 steel in the aspect of hardness changes
Autorzy:: Dudziak, B.
Gościański, M.
Powiązania:: https://bibliotekanauki.pl/articles/336443.pdf
Data publikacji:: 2012
Wydawca:: Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
Tematy:: stal
napawanie
laser
proszki metali
właściwości fizyczne
badania laboratoryjne
jakość
adhezja
steel
cladding
powders of metals
physical properties
laboratory experimentation
quality
adhesion
Opis:: W pracy przedstawiono wpływ wybranych parametrów laserowego napawania proszku metali NiCrBsi (AMI 1060.60) na stal typu C45 w aspekcie zmian twardości napoiny. Wstępne badania obejmowały wyznaczenie zakresów technologicznych parametrów napawania, zapewniających uzyskanie napoin o odpowiedniej jakości oraz gwarantujących odpowiednią adhezję z materiałem podłoża.
The influence of selected metal powder NiCrBSi (AMI 1060.60) laser cladding parameters on the C45 steel in the aspect of hardness changes has been presented in the paper. Preliminary experimental research determining the proper technological parameters of the process have been done. Padding welds with necessary quality and good adhesion with the ground material have been obtained and described.
Źródło:: Journal of Research and Applications in Agricultural Engineering; 2012, 57, 1; 29-33
1642-686X
2719-423X
Pojawia się w:: Journal of Research and Applications in Agricultural Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Investigation of structural-geometric parameters and elemental composition of spherical VT20 alloy powders
Autorzy:: Duriagina, Z. A.
Filimonov, O. S.
Kulyk, V. V.
Lemishka, I. A.
Kuziola, R.
Powiązania:: https://bibliotekanauki.pl/articles/368582.pdf
Data publikacji:: 2019
Wydawca:: Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:: spherical VT20 alloy powders
structural-geometric parameters
additive technologies
fluidity
bulk density
hydrodynamic radius
proszek sferyczny
technologie przyrostowe
płynność
gęstość objętościowa
promień hydrodynamiczny
Opis:: Purpose: Identification of structural-geometrical parameters, technological properties and elemental composition of spherical powders in a wide fraction range with respect to the VT20 alloy has been carried out. This is important for evaluating the optimum filling of a given volume by mixture of powders of different fractions during 3D printing. Design/methodology/approach: During the investigation of spherical Ti-alloy powders, a comprehensive approach was performed using Scanning Electron Microscopy (SEM), Energy-Dispersive X-ray Spectroscopy (EDS), Dynamic Light Scattering (DLS) and Inductively Coupled Plasma Mass Spectrometry (ICP-MS). The surface morphology of the powders was studied on a Tuescan Vega 3 Scanning Electron Microscope. Using the Quantax energy dispersive spectrometer, element distribution maps were obtained and histograms of element distribution in the investigated powders were constructed. ICP-MS analysis was performed to clarify the elemental composition. DLS analysis using Malvern's Zetasizer Nano-ZS equipment allowed us to determine the functional parameters (hydrodynamic radius – Rh, zeta potential – z and specific conductivity) of particles of titanium alloy powder that indirectly indicate a tendency to form conglomerates. Findings: According to the microscopic examinations, the VT20 alloy powder consists of globular-shaped particles with the lamellar traces on their surfaces. The uniformity of the chemical element distribution within each fraction of the investigated powders was confirmed by EDS, and the full conformity of the powder fractions with the elemental composition of the VT20 alloy was confirmed by ICP-MS. The DLS method allowed to establish that the formation of conglomerates would not occur within the studied fractions of the VT20 alloy powder. Research limitations/implications: The use of high sensitive investigation methods gives understanding of the mechanisms of fine structure formation and possibility to control the processes of powder coagulation in the stage of electrostatic interactions. Practical implications: The obtained results can be used for the formation of fine spherical particles of the powder, but at the same time, these technologies can be extended for the particles of non-spherical shape. Originality/value: The DLS method allowed to establish that the formation of conglomerates would not occur within the studied fractions of the VT20 alloy powder. This, in turn, will improve powder melting during 3D printing. The measured zeta potential values allowed us to reveal mechanisms of fine structure formation and to control the processes of powder coagulation in the stage of electrostatic interactions.
Źródło:: Journal of Achievements in Materials and Manufacturing Engineering; 2019, 95, 2; 49-56
1734-8412
Pojawia się w:: Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Simultaneous transmission and scattering Mössbauer measurements of powder samples
Autorzy:: Fornal, P.
Stanek, J.
Powiązania:: https://bibliotekanauki.pl/articles/148213.pdf
Data publikacji:: 2007
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: methodology of Mössbauer spectroscopy
CEMS
micro-powders
Opis:: A vertical experimental set-up for simultaneous recording transmission and scattering Mössbauer spectra is described. Application of the apparatus for the study of model powder mixture of two components with different grain sizes shows differences in the relative intensity ratio of these fractions in absorption and conversion electron Mössbauer spectroscopy (CEMS) spectra. This effect, explained as a result of the size selectivity of CEMS technique, is parameterized by the grain radius ratio of components. The possible application for investigation of isolated surface nano- and microobjects is discussed.
Źródło:: Nukleonika; 2007, 52, supl. 1; 13-16
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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