摘要
探讨了硅粉与碳粉混合料在 0 5～ 0 6MPa的低氮气压下自蔓延高温合成 (SHS)的可行性 ,起始原料中加入适量的Si3N4作稀释剂 ,可促进Si粉向Si3N4转变。C粉量增加时产物粒度减小 ;
Self-propagating High-temperature Synthesis(SHS)of Si 3N 4/SiC composite powder from silicon and carbon powder under low nitrogen pressure has been investigated,it is feasible to synthesize the composite powder in-situ under nitrogen pressure 0 5～0 6?MPa.Si 3N 4 as diluent in the starting composition promoted the coversion from silicon to Si 3N 4.The variation of product size and combustion temperature with the carbon content is also demonstrated.
