反応性ガス圧燃焼合成による高密度複合材料の作成(高圧力小特集)

概要

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Self-propagating high-temperature synthesis (SHS), also called as combustion synthesis, has advantages such as energy efficiency, simplicity high reaction temperature and productivity. The TiAl-based composite materials containing TiB_2 and Ti_2AlN were combustion-synthesised within few seconds from the mixed reactants of Ti+(0.7〜0.95)Al+(0.05〜0.50)B under nitrogen gas atmosphere of 30 〜 100 atm. The combustion temperature exceeded the melting points of TiAl and Ti_2AlN, and hence most parts of the composite was fused due to high reaction heat. The products solidified were fully dense without cracks, which consist of homogeneous grains of 〜10 μm due to rapid cooling after the SHS reaction. The use of pressurized reactive gas such as nitrogen was found to be very effective for simultaneous synthesis and consolidation of nitride ceramics- dispersed TiAl intermetallic compound.
社団法人日本材料学会の論文
1994-09-15