高压扭转半径对SiC_p/Al基复合材料组织和硬度的影响  

Effect of torsion radius on the microstructure and hardness of SiC_p/Al composite produced by high pressure torsion

作　　者：林俐菁[1] 王成国[1] 李萍[1] 乔硕[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,安徽合肥230009

出　　处：《粉末冶金工业》2015年第2期35-38,共4页Powder Metallurgy Industry

基　　金：国家自然科学基金资助项目(51175138);高等学校博士学科点专项基金资助项目(20100111110003)

摘　　要：SiCp/Al复合材料由于耐磨性好、比强度高、热膨胀系数小等优点而广泛应用于航空航天、汽车工业等众多领域。利用高压扭转法制备SiCp/Al复合材料,通过硬度测试和扫描电子显微镜观察金相组织,分析研究不同高压扭转半径对SiCp/Al复合材料组织和硬度的影响。结果表明,随着扭转半径的增大,剪切作用不断增强,等效应变增大,颗粒团聚现象减少,SiC颗粒分布均匀性增加,试样的显微硬度逐渐提高。SiCp/Al composites have a widespread use in the field of aerospace, automobile and so on, because of their good wear resistance, high specific strength and low coefficient of thermal expansion. High pressure torsion（HPT） was used to prepare SiCp/Al composites. The influence of torsion radius on the microstructure and hardness of the composite was investigated. The results show that the shear strengthening and equivalent strain increase, the particle agglomeration decreases, the distribution of SiC is more uniform and the micro-hardness of the composite increases with the increasing of torsion radius.

关 键 词：SICP/AL基复合材料 高压扭转 扭转半径 组织 硬度 

分 类 号：TB333[一般工业技术—材料科学与工程]