摘要
在分析MoO3-Al-Si体系SHS反应热力学的基础上,探讨了SHS-熔铸工艺制备MoSi2/Mo原位复合材料的可能性,研究了复合材料的原位形成过程。结果表明,MoO3-Al-Si体系的绝热燃烧温度高于4119K,能使合成产物熔化;在液态合成产物中,熔融的Al2O3能与液态的Mo和Si分离,从而可获得较纯净的Mo-Si高温熔体;Mo-Si高温熔体在凝固过程中原位形成MoSi2/Mo复合材料,而且随着复合材料中Mo含量的增加,MoSi2颗粒的尺寸减小。因此,通过SHS-熔铸工艺可以同步实现MoSi2/Mo复合材料的原位合成与液态成型一体化。
Preparation of MoSi2/Mo composites by SHS-casting process has been conducted based on analysis of the thermodynamics of MoO3-Al-Si system in SHS, focusing on the in-situ reaction process of the composites. The synthesized products can be molten with the adiabatic temperature more than 4 119 K in MoO3-Al-Si system. Furthermore, the molten Al2O3 is separated from liquid Mo and liquid Si in liquid synthesized products to obtain purified high temperature Mo-Si melt. As a result, in-situ MoSi2/Mo composites can be prepared in a mould through the solidification of Mo-Si melt, in which the particle size of MoSi2 is decreased with increasing the Mo content. The MoSi2/Mo composites can be successfully prepared by SHS-casting process.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2007年第5期393-395,共3页
Special Casting & Nonferrous Alloys
基金
国家自然科学基金资助项目(50574042)
