(Al_3Zr+ZrB_2)/ZL101原位复合材料力学性能和显微组织研究  

Mechanical Properties and Microstructure of (Al_3Zr+ZrB_2)/ZL101 In Situ Composites

作　　者：阴瑜娟[1] 赵玉厚[1] 夏永喜[2] 石益海[1] 

机构地区：[1]西安工业大学材料与化工学院,陕西西安710032 [2]西安西开高压电气股份有限公司,陕西西安710077

出　　处：《稀有金属材料与工程》2007年第A03期1-4,共4页Rare Metal Materials and Engineering

基　　金：陕西省教育厅基金项目(06JK280)

摘　　要：采用原位反应法制备(Al_3Zr+ZrB_2)/ZL101原位复合材料,测试其室温力学性能,并通过OPM,TEM观察其微观组织。结果表明:原位复合材料经过热处理后,抗拉强度、延伸率以及布氏硬度分别提高了33.2%,9.76%,39.8%。增强相ZrB_2呈不规则的块状,为六方结构,尺寸为0.4μm左右,增强相Al_3Zr呈长棒状,两种增强相整体分布均匀,且与α-Al的界面结合良好。(Al_3Zr+ZrB_2)/ZL101原位复合材料主要强化机制为Orowan强化、细晶强化、固溶强化和位错强化。The in-situ composites of （Al3Zr＋ZrB2）/ZL101 were prepared by solid-liquid reaction method. The composites＇ mechanical properties at room temperature were tested and the microstructure was observed with the aid of OPM and TEM. The results show that under heat treatment regime, the tensile, elastic modulus and hardness of in-situ composites are increased by 33.2%, 9.76%, 39.8%. The results show that ZrB2 phase is irregular massive, which is hexangular and 0.4 μm in size. Al3Zr phase is long rod. The in-situ reinforcements are distributed uniformly in the matrix and the interface with α-Al is good combination. The main mechanism for the elevated mechanical properties of the in-situ composites of （Al3Zr＋ZrB2）/ZL101 is Orowan reinforcing, fine-grain reinforcing, solution reinforcing and dislocation reinforcing.

关 键 词：原位复合材料 Al3Zr:ZrB2 力学性能 显微组织 

分 类 号：TB33[一般工业技术—材料科学与工程]