摘要
对机械合金化SiC／MoSi_2的先驱粉体及随后反应烧结制备SiC／MoSi_2复合材料工艺研究表明：经机械合金化的先驱粉体主要成分为MoSi_2。反应烧结温度在Si的熔点以上时,由于Si在MoSi_2颗粒的表面的润湿铺展,导致烧结1 h后的产物为Mo_5Si_3C,MoSi_2,SiC和单质Si；在Si的熔点以下时,对过渡相Mo_5Si_3C的产生有一定抑制作用,反应烧结过程中只有少量过渡相Mo_5Si_3C出现：通过1600℃真空热处理2 h可以基本上消除Mo_5Si_3C相,得到只有MoSi_2和SiC两相的均匀材料。
The SiC/MoSi2 composite was prepared by mechanical alloying （MA） and reactive sintering method. The results show that the main phase of the MA precursor powder is MoSi2. Due to wet-spreading of Si on the surface of MoSi2 particles, the products are Mo5Si3C, MoSi2, SiC and Si when sintering above Si melting point for 1h. The contact area of C with MoSi2 is relative small when sintering below the Si melting point the formation of Mo5Si3C is restrained. A small quantity of the intermediate phase Mos5Si3C is observed in this process, and Jt can be eliminated mostly and obtained the uniform SiC/MoSi2 composites by vacuum heat treatment at 1600℃ for 2h.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2005年第12期1974-1977,共4页
Rare Metal Materials and Engineering
