射出成形したTiAl金属間化合物の焼結体の変形におよぼす脱脂・焼結条件の影響

概要

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The influence of the debinding and the sintering condition on the distortion of sintered compact are investigated. The binder was removed from the compact by two techniques of solvent extraction and thermal evaporation. These processes make it possible to shorten the debinding time than the pure thermal evaporation technique. Relative density of sintered compact in vacuum is higher than in Ar gas. The oxide such as, Al2O3, TiO, TiO2 and TiC are formed on the sintered compact surface, and the depression-distortion is caused at the center of compact. Thicker oxide layer result in larger depression-distortion. It is important to prevent the formation of oxide layer on the compact surface. Embedding the compact in the alumina powder depressed the formation of oxide layer and distortion of sintered compact.
社団法人粉体粉末冶金協会の論文