Effect of intense vibration treatment on the powder fine structure and reaction ability during sintering

摘要

Effects of a vibration grinding treatment of TiC-Ni and TiC-Ni-Cr powder compositions on the size of X-ray coherent scattering zones as well as the melt and crystallization temperatures under liquid-phase sintering have been investigated. Hardness and strength of composites sintered from the blends grinded for 4 h and more are found to be decreased that explained by high porosity of them due to oxygen contamination of powder blends during a dry grinding treatment.