Al-Zr-B体系反应合成复合材料的组织和性能  

Mechanical Properties and Microstructure of Reactively Synthesized Particle Reinforced Al Matrix Composites in the Al-Zr-B System

作　　者：章照[1] 赵玉涛[1] 程晓农[1] 戴起勋[1] 陈刚[1] 

机构地区：[1]江苏大学

出　　处：《特种铸造及有色合金》2006年第8期512-514,共3页Special Casting & Nonferrous Alloys

基　　金：江苏省高技术研究资助项目(BG2005026);江苏省科技攻关资助项目(BE2002039);江苏省高校高新技术产业发展项目(JH02-039);江苏省铝基复合材料工程中心研发基金资助项目(BM2003014)

摘　　要：开发了原位合成Al-K2ZrF6-KBF4新体系，利用熔体反应法成功制备了新型颗粒增强铝基复合材料。XRD和SEM分析表明，合成的复合材料中存在ZrB2和Al3Zr颗粒，颗粒大小为1～4μm，ZrB2颗粒的截面形貌接近于正六边形，且在基体中均匀分布。拉伸试验结果表明，（Al3Zr＋ZrB2）p／Al复合材料的抗拉强度和屈服强度随着反应物加入量的增加而提高。当反应物加入质量分数为20％时，复合材料最高抗拉强度达到152．3MPa，比铝基体提高了95．2％；屈服强度为112．3MPa，比铝基体提高了167．3％。Phase constituent and microstructure of a new particle reinforced Al matrix composites have been observed by XRD and SEM, which is prepared by molten reaction based on a new developed in-situ Al-K_2ZrF_6-KBF_4 system. The results show that there exist ZrB_2 and Al_3Zr particles with size of 1~4 μm uniformly distributed into the synthesized composites, in which the sectioned morphology of the ZrB_2 particle is similar to regular hexahedron. Tensile testing indicates that tensile strength and yield strength of the (Al_3Zr+ZrB_2)p/Al composites can be increased with increasing in reactive additive. With the reactive additive of 20% (weight), the ultimate tensile strength and yield strength of the composites are 152.3 MPa and 112.3 MPa, respectively, improved by 95.2% and 167.3%, compared with those of the aluminum matrix, 78.0MPa and 42.0 MPa.

关 键 词：Al-Zr-B体系 铝基复合材料 熔体反应法 组织与性能 

分 类 号：TB331[一般工业技术—材料科学与工程] TG113[金属学及工艺—物理冶金]