利用自蔓延燃烧合成法制备了 Mo Si2 - WSi2 复合粉体 ,并对合成产物进行了 X射线衍射分析。研究表明 ,通过自蔓延燃烧合成反应既可实现 Mo Si2 与 WSi2 的复合 ,又可通过调整反应物 Mo,W,Si的比例 ,在 Mo Si2 中引入 WSi2的同时还能引入足够量的 Mo5 Si3- W5 Si3相。W量的增加使体系的绝热温度降低 ,对自蔓延燃烧合成反应产生影响。研究还表明 Mo Si2 - WSi2 和 Mo5 Si3- W5 Si3均以固溶体的形式存在。 The Mo Si2 - WSi2 composite powders were prepared by self - propagating combustion synthesis method and the synthesized products were analyzed by X - ray diffraction. The results show that MoSi2 and WSi2 can be synthesized by self-propagating combustion synthesis reaction, and the ratio of Mo, W and Si can be adjusted, and WSi2 can be introduced into MoSi2. At the same time, a sufficient amount of Mo5Si3- W5 Si3 phase. W increases the amount of system adiabatic temperature decreases, the synthesis of self-propagating combustion reaction. The study also shows that both Mo Si2 - WSi2 and Mo5 Si3 - W5 Si3 are in the form of solid solution.