原位反应温度对TiC/Al-4.5Cu复合材料组织与力学性能的影响  

Effect of In-situ Reaction Temperature on the Structure and Mechanical Properties of TiC/Al-4.5Cu Composite

作　　者：梁艳峰[1] 周敬恩[1] 董晟全[2] 杨通[2] 

机构地区：[1]西安交通大学金属强度国家重点实验室材料学院,陕西西安710049 [2]西安工业学院材料与化工学院,陕西西安710032

出　　处：《铸造技术》2006年第6期621-624,共4页Foundry Technology

基　　金：陕西省教育厅专项科研计划资助项目(05JK233)

摘　　要：通过预制块在铸造Al-4.5Cu合金熔体中的自蔓延反应来制备TiCp/Al-4.5Cu复合材料,考察原位反应温度对该复合材料组织与力学性能的影响。结果表明,原位反应温度为950℃时所制备的复合材料力学性能较优;TiC颗粒呈小圆片状,与基体结合良好,无其他有害相生成。原位反应温度为900℃和1 000℃时所制备的复合材料组织中都有产生针状Al3Ti的倾向。In-situ composites of TiC/Al-4.5Cu were fabricated via self-propagating reaction of a prepared block in molten cast Al-4.5Cu alloy. The effect of in-situ reaction temperature on the structure and mechanical properties of TiC/Al-4.5Cu was studied. The results showed that when the in-situ reaction temperature is held at 950 ℃, the mechanical properties of the composite are improved; TiC particles have small, thin and round plate shape dispersed uniformely in the matrix ofα-Al; there are no other harmful phases formed. When the in-situ reaction temperature is 900℃ or 1 000 13, rod-like AI3Ti are formed in the structure of the composites.

关 键 词：原位反应温度 TIC颗粒 针状Al3Ti 

分 类 号：TB331[一般工业技术—材料科学与工程]