摘要
通过湿法混合和热压法制备了不同体积百分比的 Ti Cp- Mo Si2 复合材料 ,研究了 Ti C颗粒对 Mo Si2 基体材料显微结构和力学性能的影响。实验结果表明 ,在 Mo Si2 基体中加入 Ti C颗粒 ,细化了基体的晶粒 ,改善了其力学性能。与纯 Mo Si2 相比 ,含 40 vol% Ti C颗粒的复合材料的室温抗弯强度提高了 6 5 % ,含 2 0 vol% Ti Cp的复合材料的室温断裂韧性提高了 5 3% ,而且 Ti C颗粒的加入大大提高了 Mo Si2 的高温承载能力 ,随 Ti C颗粒含量的增加 。
TiCp MoSi 2 composites with different volume percent were fabricated by wet mixing and hot pressing processing The effects of TiC particles on microstructure and mechanical properties of MoSi 2 matrix were investigated The results indicated that the grain size of MoSi 2 matrix material decreased and its mechanical properties were improved because of the addition of TiC particles The composites displayed an increase of 65% in bending strength for 40vol%TiCp additive and an improvement of 53% in fracture toughness for 20vol%TiCp additive over the values of the matrix The load bearing capability of MoSi 2 at elevated temperature was increased rapidly due to the addition of TiC particles and the flexural strength of composite increased with increasing the content of TiC particles
出处
《材料工程》
EI
CAS
CSCD
北大核心
2001年第9期31-34,共4页
Journal of Materials Engineering
