摘要
主要研究了Al/Zn-3Al/Cu钎焊接头在凝固过程中实施超声处理时其钎缝层显微结构和性能的演变。研究结果表明,在未经凝固超声处理的钎焊接头中,钎缝层呈现出一种各向异性的显微结构;然而,在经过凝固超声处理的钎焊接头中,钎缝层有着均匀的显微结构,其由一种等轴的花瓣状Cu Zn5/Al复合物以及弥散其间的细小α-Al晶粒和Zn-Al共晶组织组成。性能测试结果表明,与未经凝固超声处理的钎焊接头相比,经过凝固超声处理的接头钎缝层的硬度增加了26.2%,热膨胀系数降低了38%。
Evolution of the microstructure and properties of Al/Zn-3Al/Cu brazed joint treated with ultrasound during solidification was investigated. Results show that, an anisotropic microstructure is exhibited in the joint without ultrasonic treatment during solidification. However, a homogeneous microstructure displayed with an equiaxial flower-like Cu Zn5/Al composite interspersed with a refined α-Al phase and Zn-Al eutectic phase is present in the joint treated with ultrasound during solidification. Properties test results show that, compared with the Cu/Al joint without ultrasonic treatment, the filler metal layer in the ultrasound treated Cu/Al joint shows a 26.2% increase in hardness and a 38.0% decrease in the coefficient of thermal expansion.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2014年第12期70-73,共4页
Electronic Components And Materials
基金
国家"十二.五"科技支撑计划资助项目(No.2012BAF01B04)
