放電プラズマ -燃焼合成法により作製したTi-Al金属間化合物系複合材料の形成過程とその組織 The Formation Mechanism and the Microstructure of Ti-Al Intermetallic Compound System Composite Materials Fabricated by Spark Plasma-combustion Synthesis Method
The aims of this study were to observe the microstructure and the tormed phases of Ti-Al intermetallic compound system composites made by spark plasma-combustion synthesis and to investigate the phase formation mechanism.<BR>During the spark plasma sintering of the Ti:Al=1:1 powders, combustion synthesis was indicated by the abruptly shringkage in sample volume at Al melting point. The microstructure and the formed phase of spark plasma-combustion synthesized composites varied according to Ti particle size. For example, TiAl<SUB>3</SUB> phases were formed when 100μm Ti powders were used, and TiAl, Ti<SUB>2</SUB>Al and Ti<SUB>3</SUB>Al phases were formed when 10μm Ti powders were used (the sintering temperature was 973K). The formation mechanism of compounds using spark plasma sintering has two processes; combustion synthesis at Al melting point and diffusion in the high temperature region.
粉体および粉末冶金 43(4), 438-443, 1996-04-15
Japan Society of Powder and Powder Metallurgy