抗高温氧化Mo（Si,Al）_2粉末材料的自蔓延燃烧合成

摘要

This paper mainly researched the influence factors of Self-propagating high temperature synthesis （SHS） process and the difference of phase with different additional aluminium. The results shows that it is possible to synthesize Mo （Si, Al）2 by SHS process at room temperature and it is beneficial for SHS process of Mo （Si, Al）2 when the size of reaction raw material reduced;The product will transform completely to the phase of C40 When addition ratio of aluminium is x=0.3 ; The best addition of aluminium is x=0.4, and then, the phase of product is Mo（ Si0.6, Al0.4）2.%本文主要研究Al添加量对Mo（Si,Al）2材料自蔓延燃烧合成过程以及物相转变的影响,以确立Al的最佳添加量,并分析自蔓延燃烧合成Mo（Si,Al）2材料的主要影响因素。研究结果表明,采用自蔓延燃烧合成法能够在室温环境下合成Mo（Si,Al）2,且反应物原料的粒径较小时,有利于Mo（Si,Al）2自蔓延燃烧合成的进行;当Al添加量x=0.3时,产物可完全转化为C40相;当Al添加量x=0.4时最合适,其产物为Mo（Si0.6,Al0.4）2。