Showing papers in "Powder Metallurgy in 2020"
TL;DR: In this article, the mechanisms of densification in spark plasma sintering (SPS) were investigated both analytically and numerically for a model system of two spherical metallic powder particles.
Abstract: The mechanisms of densification in spark plasma sintering (SPS) were investigated both analytically and numerically for a model system of two spherical metallic powder particles. From the microscop...
13 citations
TL;DR: In this article, the interaction of powder metallurgical iron-base alloys with the atmosphere during sintering is described, and the methods of thermal analysis serve to clarify the processes that take place.
Abstract: This overview paper describes the interaction of powder metallurgical iron-base alloys with the atmosphere during sintering. The methods of thermal analysis serve to clarify the processes that take...
12 citations
TL;DR: In this paper, the development of high-entropy alloys (HEAs) fabricated via powder Metallurgy (PM) techniques is addressed, and potential opportunities for PM techniques to produce different HEAs are discussed.
Abstract: This article addresses the development of high-entropy alloys (HEAs) fabricated via Powder Metallurgy (PM) techniques. There are potential opportunities for PM techniques to produce ‘different’ HEA...
12 citations
TL;DR: In this paper, the feasibility of selective laser melting (SLM) for WC-20Co cemented carbide was investigated for manufacturing WC20Co carbide, and both the microstructure analysis and finite element simulation were used.
Abstract: The feasibility of selective laser melting (SLM) was investigated for manufacturing WC-20Co cemented carbide in this study. Both the microstructure analysis and finite element simulation were used ...
10 citations
TL;DR: In this paper, the mechanisms of densification during spark plasma sintering (SPS) of spherical copper particles are investigated both experimentally and analytically, and experimentally measured densification rates...
Abstract: The mechanisms of densification during spark plasma sintering (SPS) of spherical copper particles are investigated both experimentally and analytically. Experimentally measured densification rates ...
10 citations
TL;DR: In this paper, an Al-Cu-Mg-Si alloy was prepared by conventional press-sintering powder metallurgy using elemental Al powder, and the phase transformation process of Al, Mg, Al-Si and Cu during the sintering process was described.
Abstract: An Al–Cu–Mg–Si alloy was prepared by conventional press-sintering powder metallurgy using elemental Al powder. The phase transformation process of Al–Mg, Al–Si alloy and Cu during the sintering pro...
9 citations
TL;DR: In this paper, the suitability of compaction equations commonly used in PM was investigated for the modelling of TiH2 powder compaction, and compressibility data of the powder fractions (<45, <150 and <355μm) were obtained.
Abstract: The suitability of compaction equations commonly used in PM was investigated for the modelling of TiH2 powder compaction. Compressibility data of TiH2 powder fractions (<45, <150 and <355 μm) were ...
8 citations
TL;DR: In this article, the authors propose a method for uniaxial die-pressing of powder before sintering, which causes particle rearrangement and deformation and the initial state of the compact u...
Abstract: Conventional ferrous powder metallurgy relies on uniaxial die-pressing of powder before sintering. The operation causes particle rearrangement and deformation and the initial state of the compact u...
8 citations
TL;DR: In this paper, the effect of polypropylene (PP) as the backbone polymer of metal injection molding (MIM) feedstock has been investigated on the micro-structural phase constituents, mechanical and...
Abstract: In this study, the effect of polypropylene (PP) as the backbone polymer of Metal injection moulding (MIM) feedstock has been investigated on the micro-structural phase constituents, mechanical and ...
8 citations
TL;DR: The high-temperature thermal properties of powder metallurgy derived superalloys have not been reported in the literature as mentioned in this paper, and the coefficient of thermal expansion (CTE), specific heat a...
Abstract: The high-temperature thermal properties of powder metallurgy derived superalloys have not been reported in the literature. In this study, the coefficient of thermal expansion (CTE), specific heat a...
7 citations
TL;DR: In this article, the effect of water spray configuration on the fineness and uniformity of a metal powder produced by water atomization of a melt stream was investigated, and the effects of the spray travel distance, nozz...
Abstract: We consider the effect of water spray configuration on the fineness and uniformity of a metal powder produced by water atomization of a melt stream. The effects of water spray travel distance, nozz...
TL;DR: Powder metallurgy (PM) technology is an ideal manufacturing process to produce near net shape parts i.e. part that requires little or no machining, examples of PM processes are spark plasma sinteri...
Abstract: Powder metallurgy (PM) technology is an ideal manufacturing process to produce near net shape parts i.e. part that requires little or no machining, examples of PM processes are spark plasma sinteri...
TL;DR: In this paper, the authors used numerical simulations to describe the solid-state diffusion of a sintering stage during a metal injection molding process for micro-fluidic components with 316L capacity.
Abstract: This study investigates the use of numerical simulations to describe the solid-state diffusion of a sintering stage during a metal injection moulding process for micro-fluidic components with 316L ...
TL;DR: In this article, the viscosity of beams affects the deflection level, thus in sintering practice also the tendency to distortion, and the authors show that deflection value increases w.r.t.
Abstract: During Supersolidus Liquid Phase Sintering the viscosity of beams affects the deflection level, thus in sintering practice also the tendency to distortion. Although the deflection value increases w...
TL;DR: In this article, the pore structure and liquid phase sintering behavior of Cu-28Zn powder specimens at different green density levels and temperatures were investigated at different densities and temperatures.
Abstract: The aim of this research is to study the pore structure as well as to assess the liquid phase sintering behaviour of Cu-28Zn powder specimens at different green density levels and temperatures. For...
TL;DR: In this paper, powder metallurgy (PM) H13 steels were investigated based on the characterisation of water atomised H13 powders, and vacuum sintering was carried out from 1150 to 1265°C.
Abstract: In this paper, powder metallurgy (PM) H13 steels were investigated based on the characterisation of water atomised H13 powders. Vacuum sintering was carried out from 1150 to 1265°C for sintering de...
TL;DR: In this paper, the effect of Ta particle addition into a Ti6Al4V alloy processed by solid state sintering was investigated, and the volume fraction of Ta ranged between 0 and 30
Abstract: This work investigates the effect of Ta particle addition into a Ti6Al4V alloy processed by solid state sintering. The volume fraction of Ta ranged between 0 and 30 vol.-%. The sintering kinetics o...
TL;DR: The most limiting features of titanium as a bone substituent are lack of bioactivity and high Young's modulus as discussed by the authors, and they have prepared titanium-hydroxyapatite (Ti-HAp) composites using titanium hydride as...
Abstract: The most limiting features of titanium as a bone substituent are lack of bioactivity and high Young’s modulus. We have prepared titanium-hydroxyapatite (Ti-HAp) composites using titanium hydride as...
TL;DR: The quaternary chalcogenide Cu2ZnSnS4 has emerged as a potential thermoelectric (TE) material due to its low thermal conductivity (κ), high Seebeck coefficient (S) and composition including earth-a...
Abstract: The quaternary chalcogenide Cu2ZnSnS4 has emerged as a potential thermoelectric (TE) material due to its low thermal conductivity (κ), high Seebeck coefficient (S) and composition including earth-a...
TL;DR: In situ TiB2 and TiC reinforced copper matrix composites with tailored heterogeneous structure were fabricated via high-energy ball milling of Cu, TiH2 and B4C powders followed by hot pressing.
Abstract: In situ TiB2 and TiC reinforced copper matrix composites with tailored heterogeneous structure were fabricated via high-energy ball milling of Cu, TiH2 and B4C powders followed by hot pressing. The...
TL;DR: In this paper, an attempt is made to investigate the effects of the resistance, voltage, capacitance and input energy during the high-rate discharge compaction process, and the governing differential is investigated.
Abstract: In this paper, an attempt is made to investigate the effects of the resistance, voltage, capacitance and input energy during the high rate discharge compaction process. The governing differential e...
TL;DR: In this article, the influence of the microstructure on the corrosion behavior of WC-Co in two corrosive media was studied and the main goal of the present work was to study the influence on the micro-structure of the carbide.
Abstract: The main goal of the present work is to study the influence of the microstructure on the corrosion behavior of cemented carbides WC-Co in two corrosive media. Corrosion kinetics were determined by ...
TL;DR: In this paper, a novel design of centrifugal atomiser for producing pure copper powder was studied, and a complementary hybrid system provided an external stream of gas to increase the co...
Abstract: In the present work, a novel design of centrifugal atomiser for producing pure copper powder was studied. The novel complementary hybrid system provides an external stream of gas to increase the co...
TL;DR: In this article, the influence of green density between 6.5 and 7.3 cm−3 on the shrinkage of plain iron was investigated by dilatometry, and the geometrical activity deriving from green density was derived.
Abstract: The influence of green density between 6.5 and 7.3 g cm−3 on the anisothermal and isothermal shrinkage of atomized plain iron was investigated by dilatometry. The geometrical activity deriving from...
TL;DR: The sintering behavior of LaFe11.0Si1.2Co0.8 powder produced by gas atomisation was examined to provide a basis for the application of powder metallurgical shaping technologies to magnetocaloric L...
Abstract: The sintering behaviour of LaFe11.0Si1.2Co0.8 powder produced by gas atomisation was examined to provide a basis for the application of powder metallurgical shaping technologies to magnetocaloric L...
TL;DR: In this paper, a combined processing method of mechanical alloying and infiltration was used to prepare the WCu-x wt-%SiC (x = 0.5, 1, 2, 3) composites.
Abstract: In this paper, a combined processing method of mechanical alloying and infiltration was used to prepare the WCu-x wt-%SiC (x = 0.5, 1, 2, 3) composites. The microstructure, density, electrical cond...
TL;DR: The selective laser melting (SLM) process has gained considerable attention from industry and academia over the recent years as discussed by the authors, and the hot isostatic pressing (HIP) technique has been widely used.
Abstract: The selective laser melting (SLM) process has gained considerable attention from industry and academia over the recent years. Furthermore, the hot isostatic pressing (HIP) technique has been widely...
TL;DR: In this article, the authors used plasma nitriding or surface carburizing to enhance the surface hardness of steel components, but the important difference between these treatments is the tem...
Abstract: Thermochemical treatments like plasma nitriding or surface carburizing are commonly used to enhance surface hardness of steel components. An important difference between these treatments is the tem...
TL;DR: In this article, different ratios of zirconium carbide and titanium carbide (TiC) powders were added to Vanadis 4 Extra (V4 Extra) steel powders.
Abstract: In the present research, different ratios of zirconium carbide (ZrC) and titanium carbide (TiC) powders were added to Vanadis 4 Extra (V4 Extra) steel powders. The composite powders (V4 Extra−ZrC−T...
TL;DR: In this paper, a novel W and TiO2 synergistic strengthened copper matrix nanocomposite was prepared by a powder metallurgy route with a mechano-chemical method and subsequent consolidation.
Abstract: In this study, a novel W and TiO2 synergistic strengthened copper matrix nanocomposite was prepared by a powder metallurgy route with a mechano-chemical method and subsequent consolidation. Nano-si...