(ZrB_2+Al_3Zr)/ZL101原位复合材料正交实验研究  

Study on the Orthogonal Experiment and Microstructure of In-situ Composite (ZrB_2+Al_3Zr)/ZL101

作　　者：石益海[1] 赵玉厚[1] 

机构地区：[1]西安工业大学材料与化工学院,陕西西安710032

出　　处：《铸造技术》2008年第1期88-91,共4页Foundry Technology

基　　金：陕西教育厅基金资助项目(06JK280)

摘　　要：采用原位反应法制备了原位(ZrB2+Al3Zr)/ZL101复合材料,通过正交实验分析确定了其最佳成分,测试了复合材料的力学性能,并对该材料进行了显微金相分析和透射电子显微分析。研究结果表明,与ZL101材料相比,(ZrB2+Al3Zr)/ZL101原位复合材料在其最佳成分配比下,强度提高了35.5%,伸长率提高了12.2%,布氏硬度提高了25.5%;原位复合材料中增强相ZrB2为粒状,Al3Zr为长棒状,两相均匀分布于基体晶粒内部,且与α-Al的界面结合良好;热处理后,原位复合材料中的共晶硅以粒状形态均匀分布于基体中。（ZrB2 ＋ Al3Zr）/ZL101 in-situ composite was prepared by in-situ reaction, the optimum composition was determined by orthogonal experiment. The mechanical properties of the composite were tested, and the microstructure was studied by means of optical microscopy and transmission electron microscopy. The experimental results show that in comparison with those of ZL101, the tensile strength, elogation and the HB hardness of the composite with the optimum composition increase 35.5%, 12.2% and 25.5% respectively. The strengthening ZrB2 and Al3Zr phases in the composites have particle and rod shape respectively, which are distributed uniformly in the matrix and have a good bond with （α-Al. The eutectic Si with particle shape is distributed uniformly in the matrix after heat treatment.

关 键 词：原位复合材料 正交实验 力学性能 增强相 

分 类 号：TB33[一般工业技术—材料科学与工程]