TiC-Ni-Mo复合材料的燃烧合成研究

Research on TiC-Ni-Mo Composites by Combustion Synthesis

通过自蔓延高温燃烧合成结合准热等静压（SHS／PHIP）方法得到TiC－Ni－Mo复合材料TH20和TH30.研究了工艺过程参数对材料致密性的影响．得到了最佳的工艺规范．SHS反应产物主要存在两相：TiC相和Ni的固溶体相，球形的TiC颗粒相被包围在近乎网状结构的Ni合金粘结相当中．TiC颗粒与粘结相界面结合良好，反应产物中有少量游离碳的存在，TH20和TH30的抗弯强度同传统方法生产的相近成分的材料相比比较接近．

Dense TiC-Ni cermets TH20 and TH30 were produced by self-propagating high-temperature synthesis and pseudo heat isostatic pressing. The influence of process parameters on densities was investigated. Cermet mainly consisted of TiC particles and Ni-binder. TiC skeletal structure was enveloped by continuous Ni-binder phase. The interfacial bonding between TiC and Ni was found to be of a good quality. High dislocation existed near the interface and inside the Ni-binder phase,some residual carbon exists in reaction product. Meanwhile transverse rupture strengths of TH20 and TH30 were both close to those produced by conventional technology.