摘要
采用喷射沉积工艺制备SiCP/Al-11.7Fe-1.15V-2.4Si复合材料,并通过热压工艺对复合材料进行致密化,再通过热轧加工成板材。对复合材料的显微组织以及不同温度下复合材料的断裂性能和断口形貌进行研究。结果表明:采用热压致密后再热轧工艺能使SiC颗粒分布均匀,长轴方向平行于轧制方向,有利于增强复合材料的力学性能,复合材料的断裂性能和断面形貌与拉伸温度以及SiC的分布和取向相关,随着拉伸温度升高,SiC/Al界面强度减弱,拔断的SiC颗粒逐渐减少,SiC颗粒的拔出成为主要的裂纹源;与基体金属不同的是,复合材料的塑性随着温度升高而降低。
SiCP/Al-11.7Fe-1.15V-2.4Si composite was prepared by spray deposition and densified by hot pressing,and then were rolled into sheets.The microstructures,fracture properties and fractographies of the composite at different tensile temperatures were investigated.The results show that the uniform distribution of the SiC particles with their longitudinal direction parallel to the rolling direction is achieved by rolling after hot pressing,which contributes to the elevation of the mechanical properties of the composite.Fracture properties and fractographies of the composite are affected by the tensile temperature and distribution and orientation of SiC particles.The bonding between SiC particles and the matrix becomes weak,and the breakable particles reduce as the tensile temperature;the debonding of SiC/Al becomes the dominant fracture mechanism,the plasticity of the composite decreases as the tensile temperature increases,which is different from the matrix alloy.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2010年第3期469-475,共7页
The Chinese Journal of Nonferrous Metals
基金
江苏省高校自然科学研究资助项目(09KJD430001)
江苏省高校重点建设学科资助项目
关键词
SIC颗粒
耐热合金
复合材料
喷射沉积
断裂行为
SiC particle
heat resistant alloy
composite
spray deposition
fracture behavior
