TiC颗粒增韧MoSi2基复合材料的力学性能

通过湿法混合和热压法制备了不同体积百分比的TiCp-MoSi2复合材料，研究了TiC颗粒对MoSi2基体材料显微结构和力学性能的影响。实验结果表明，在MoSi2基体中加入TiC颗粒，细化了基体的晶粒，改善了其力学性能。与纯MoSi2相比，含40vol% TiC颗粒的复合材料的室温抗弯强度提高了65％，含20vol%TiCp的复合材料的室温断裂韧性提高了53％，而且TiC颗粒的加入大大提高了MoSi2的高温承载能力，随TiC颗粒含量的增加，复合材料的高温抗弯强度大为增加。

Mechanical Properties of TiC Particles ReinforcedMoSi2 Composites

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