论文部分内容阅读
本文探讨了金属相Ｆｅ的含量变化对ＴｉＣ／Ｆｅ体系自蔓延高温合成的影响。随着Ｆｅ含量的增高，燃烧温度降低，在Ｆｅ为３０～３５ｗｔ％时出现一个温度平台，对应着Ｆｅ的熔融。燃烧波速度在Ｆｅ为１０ｗｔ％时出现极大值，反映ＳＨＳ过程中Ｆｅ液相的作用。Ｆｅ含量增高，体系的燃烧模式由稳态燃烧转变为振荡式和螺旋式燃烧，当Ｆｅ＞６０ｗｔ％时，体系燃烧反应则不能自持。合成产物中ＴｉＣ粒度随着Ｆｅ含量增高而变细，反映了燃烧温度和铁液相对ＴｉＣ粒子生长的联合作用。
In this paper, the effect of the content of metal phase Fe on the SHS synthesis of TiC / Fe system was discussed. As the Fe content increases, the combustion temperature decreases, and a temperature platform appears at Fe of 30-35 wt%, corresponding to the melting of Fe. The combustion wave velocity shows a maximum value when Fe is 10wt%, which reflects the effect of Fe liquid phase in SHS process. The content of Fe increases, the combustion mode of the system changes from steady combustion to oscillating and screw combustion, but when Fe> 60wt%, the combustion reaction of the system can not self-sustain. The particle size of TiC in the synthesized product decreases with the increase of Fe content, which reflects the combined effect of combustion temperature and molten iron on TiC particle growth.