高体积分数SiC_P/Al复合材料固溶处理工艺研究

Research on the Solution Treatment Process for SiC_P/Al Compositeswith Large Volume Fraction

采用金相分析、维氏硬度测定、拉伸试验以及扫描电镜观察等研究手段研究了固溶热处理工艺对高体积分数SiCP/Al复合材料的力学性能、拉伸曲线和断口组织的影响。结果表明:当固溶温度为528℃时,材料的强度和韧性都处于最佳状态,其缺口抗弯力位移曲线在较高应力下出现平台,说明可通过优化固溶处理参数,提高材料的强度及韧性,降低材料的瞬时破坏性断裂倾向。

Study is made on the effect of solution heat treatment process on mechanical properties,the tensile curve and fracture morphology of SiCP/Al composites with the high volume fraction by means of metallographic analysis,Vickers hardness test,tensile test and TEM.The results show that the strength and toughness of composites are in the best condition when the solution temperature is 528 ℃,and the notch bending resistance displacement curve appears flat at high stress,indicating the possibility of improving the material strength and toughness and reducing tendency of the instantaneous destructive fracture through the optimization of the soild-solution treatment parameters.