(TiB_2+SiC)/ZL109复合材料的制备及其力学性能  

Fabrication and Mechanical Properties of (TiB_2+SiC)/ZL109 Composites

作　　者：赵德刚[1] 刘相法[1] 边秀房[1] 

机构地区：[1]山东大学材料液态结构及其遗传性教育部重点实验室,山东济南250061

出　　处：《铸造》2004年第2期97-100,共4页Foundry

基　　金：国家自然科学基金资助项目(50171037)

摘　　要：采用搅拌铸造和原位反应合成相结合的方法制备出(TiB2+SiC)/ZL109复合材料。对该复合材料的显微组织观测表明,SiC颗粒与TiB2颗粒分布较均匀。通过对材料的室温拉伸性能及硬度测试,发现TiB2、SiC两相颗粒增强Al-Si基复合材料的硬度明显比单一颗粒增强复合材料提高,而其拉伸强度也略有提高,弥补了单一SiC颗粒增强铝基复合材料UTS降低的不足。(TiB2+SiC)/ZL109复合材料较基体合金ZL109硬度提高了34 8%。Fabrication technology of (TiB_2+SiC)/ZL109 composites by stirring casting and in-situ method was studied in this paper. The microanalysis of the composites revealed that TiB_2 and SiC particles are well distributed in the matrix. From the results of hardness tests and tensile experiments at room temperature, it is found that the hardness of the composites reinforced cooperatively by TiB_2 and SiC, is obviously higher than that of the ZL109 matrix, and the tensile strength of the composites is slightly higher than the matrix.The composites cover the shortage that UTS of composites reinforced by SiC particle declines sharply. It can be shown that the hardness of the (TiB_2+SiC)/ZL109 was raised by 34.8% than that of matrix.

关 键 词：复合材料 铝合金 TiB2粒子 SIC粒子 协同增强 

分 类 号：TB331[一般工业技术—材料科学与工程]