SiC颗粒尺寸对高压扭转制备SiCp/Al基复合材料金相组织和显微硬度影响  

EFFECTS OF SiC PARTICLE SIZE ON THE MICRO STRUCTURE AND MICRO HARDNESS OF SiCp/Al COMPOSITES BY HIGH PRESSURE TORSION

作　　者：林俐菁[1] 王成国[1] 乔硕[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,合肥230009

出　　处：《粉末冶金工业》2014年第1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：采用高压扭转法制备不同增强颗粒尺寸的SiCp/Al基复合材料,利用金相观察、显微硬度测试,分析研究不同增强颗粒尺寸对SiCp/Al基复合材料组织和硬度的影响。研究结果表明:SiC颗粒尺寸较小时,在高的静水压力和剪切作用下,颗粒分布均匀性增强。SiC颗粒尺寸增大时,有效的剪切作用易致使自身存在缺陷的SiC颗粒发生断裂破碎,颗粒分布均匀性降低。同一扭转半径处,随着颗粒尺寸的增大,复合材料显微硬度降低。SiCp/Al composites with different particle size were prepared by High Pressure Torsion （HPT）.Metallographic observation and microhardness were employed to analyze the influences of different particle size on microstructures and hardness.As the result,small SiC particle size led to enhanced under high hydrostatic pressure and shear.However,large particle size led to poor particles distribution uniformity because the SiC particles with inherent defects risked breaking under shearing.At the same radius,the microhardness of composite material decreased with increasing particle size.

关 键 词：SICP AL基复合材料 高压扭转 颗粒尺寸 金相组织 显微硬度 

分 类 号：TB333[一般工业技术—材料科学与工程]