摘要
采用高温压缩实验研究了不同体积分数 ＳｉＣ含量对原位合成 ＭｏＳｉ２—ＳｉＣ复合材料在 １０００－１４００℃ 的屈服强度及流变应力的影响结果表明，与单－ ＭｏＳｉ２材料相比，复合材料的高温强度随 ＳｉＣ含量的增加而明显提高．高温屈服强度 σｙ和第二相 ＳｉＣ粒子间距λＳ服从σＹ＝σ０＋ｋλＳ－１／２关系式结合组织结构的研究结果对其相间障碍强化的高温强化机制进行了初步探讨．
The effects of SiC volume fraction on yield strength and flow stress of synthesized MoSi2-SiC composite synthesized within the temperature range between 1000 and 1400 degreesC were investigated by compressive tests. The results show that the high temperature strength of the composite is significantly higher than that of monolithic MoSi2. With increasing SiC volume fraction, the yield strength and flow stress of composite increase. The relationship between yield strength sigma (y) and interparticle spacing lambda (s) follows equation as sigma (y) = sigma (0) + k lambda (-1/2)(s). It is suggested that increase in strength at elevated temperature is resulted from interphase strengthening.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2001年第4期369-372,共4页
Acta Metallurgica Sinica
基金
国家自然科学基金资助项目59895150-04-02
关键词
MOSI2-SIC复合材料
原位合成
相间障碍强化
高温压缩
MoSi2-SiC composite
synthesized in situ
interphase barrier strengthening
compressive test at elevated temperature
