メカニカルアロイングで作られた非晶質Ti-Cu合金粉末の結晶化過程

概要

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Changes in structure and hardness with heating below the crystallization temperature in the amorphous compact prepared from the mechanically alloyed powder of Ti-43at%Cu were invesitigated by using X-ray analysis and Vickers hardness test. The hardness of the compact increased remarkably by heating at near the crystallization temperature. This hardening phenomenon was attributed to form fine intermetailic phases from the amorphous phase. However, the hardness in the as-compacted state was Hv??520, but this value increased to Hv??20 by heating up the compact to 613K. The hardness of the compact also increased slightly by heating at lower temperatures than the crystallization temperature. This hardening phenomenon was attributed to form small zone caused by diffusion of a few of atoms in the amorphous phase.
社団法人粉体粉末冶金協会の論文