摘要
采用粉末冶金+热挤压法制备了10%SiCP/6066Al(体积分数)复合材料。对材料拉伸性能进行了研究,并利用金相显微镜、扫描电镜和透射电镜对微观组织结构进行了观测。实验结果表明:SiC颗粒在铝基体中分布比较均匀;T6热处理条件下10%SiCp/6066Al复合材料的抗拉强度和屈服强度分别约为430.5、354.1MPa,其延伸率为5%,弹性模量为84.5GPa。加入SiC颗粒后合金基体晶粒细化同时位错密度提高,位错强化和细晶强化在SiCP/Al复合材料的强化机制中起了主要作用。
The 10%SiCp/Al （volume fraction） composites were fabricated by power metallurgy plus hot extrusion. The tensile properties of the materials were studied, and their mierostruetures were also observed by SEM and TEM. The experimental results indicate that SiC particles distribute homogeneously in the matrix, and the tensile strength, yield strength, elongation and elastic modulus of 10%SiCv/6066A1 composites are 430. 5, 354.1MPa, 5% and 83.5GPa under T6 heat treatment, respectively. Adding SiC particles into A1 matrix leads to high dislocation density and crystalline refinement. The dislocation strengthening and crystalline refinement play important roles in the strengthening mechanisms for the composites in our experiment.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2006年第7期1134-1137,共4页
Journal of Functional Materials
基金
国家自然科学基金资助项目(10147207)
重庆市科委科技计划资助项目(CSTC2005AC4044)
关键词
铝基复合材料
拉伸性能
显微结构
强化机制
aluminum matrix composites
tensile property
microstructure
strengthening mechanisms
