Effects of vacuum sintering temperature on mechanical properties and electric resistance for Cr50–Si50 optical target

Abstract

In this study, two kinds of Cr and Si powders were mixed ingredients in set proportions (Cr/ Si550 : 50 in weight percentage), and different vacuum sintering temperatures were used to achieve the optimal densification process. The specimens used in this investigation have common microstructures of hardness, XRD, transverse rupture strength and resistivity of the Cr50-Si50 targets. The microstructure shows that the porosity tends to decrease as sintering temperature increases. Conversely, hardness and transverse rupture strength increase as sintering temperature increases. These results agree with the variation in porosity. Additionally, the resistivity tends to decrease with increasing sintering temperature. It should be correlated with the microstructure of Cr50-Si50 targets, increasing the density of CrSi 2 could significantly decrease the resistance. Meanwhile, the resistivity decreases and conductivity increases as the neighbours are closer together, which also results from the decreasing porosity.

Replication of microchannel structures in WC–Co feedstock using elastomeric replica moulds by hot embossing process

“…Our previous study indicated that when the sintering temperature increased, the relative density rapidly increased, and the apparent porosity clearly decreased [54,56]. Fig.…”

“…Sintering is a useful method for manufacturing parts from powders by heating the material until its particles adhere to each other. However, the sintering temperature cannot exceed the melting point of the sintered based materials [53,54]. Fig.…”

Effect of Particle Size and Vacuum Sintering Temperature on Phase Composition and Mechanical Properties of WC-12 wt% Co Hardmetals

“…To ensure high and reliable mechanical properties of WC-Co cermets, the WC grain size must be fine and uniform distribution [3]. Furthermore, there are two basic ways of obtaining cemented carbide; through melt-solidification processing at about 2000-2500°C or by PM processing at a temperature range of 1350-1500°C [4,5]. Conventional PM involves mixing the metal powders, compacting of the mixed powders into molds and then sintering of the compact powders under different atmospheres.…”