原位内生多相复合材料(NiAl—28Cr—6Mo)—TiC的高温力学行为

ELEVATED TEMPERATURE DEFORMATION BEHAVIOR OF IN SITU MULTIPHASE COMPOSITE (NiAl-28Cr-6Mo)TiC

运用燃烧合成工艺制备了一种多相内生金属问化合物基复合材料（NiAl—28Cr—6Mo）－TiC．复合材料的高温变形行为显示流变应力随温度升高或初始应变速率减小而降低，服从幂指数规律求出了不同含量TiC时复合材料的应力指数n和激活能Q，与同类NiAl基复合材料进行了比较分析.

An intermetallic matrix composite (NiAl-28Cr-6Mo)-TiC has been successfully fabricated by using reaction synthesis method. The elevated temperature deformation behavior of the in situ multiphase composite was investigated. The flow stress decreases with increasing temperature or decreasing initial strain rate. The deformation behavior of the composite can be adequately described by the power law. The stress exponent and activation energy are calculated and compared with other similar NiAl-based composites.