S0402-2-5 粉末冶金プロセスによるTi-Sn-Cr形状記憶合金の作製とその特性([S0402-2]粉末成形とその評価(2))

概要

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Ti-Sn-Cr shape memory alloys (SMA) were fabricated by powder metallurgy (PM) process. The mixed powders in composition of Ti-3at%Sn-7at%Cr were prepared using ball milling process. The mixed powders were filled into the graphite die, and then sintered at a temperature of 1023 K and 1223 K using a pulse current sintering method. The sintered alloy was solution-treated and then tempered. The tensile properties and the phase structure of the alloy obtained were investigated. The relative density of the alloy sintered at 1223 K was 99 %. The solution-treated alloy was mainly consisted of the β phase. The alloy tempered at 773 K and 973 K was consisted partly of the a phase. It was found from the result of bending test that the alloy fabricated by the PM process has shape recovery properties.
2010-09-04