超声波振动下SiC陶瓷颗粒与Zn-Al液态合金的相互作用机制  

Interaction Mechanism Between SiC Ceramic Particles and Liquid Zn-Al Alloy Under Ultrasonic Vibration

作　　者：张洋[1] 宋博瀚 闫久春[2] 

机构地区：[1]石家庄铁道大学河北省交通工程材料重点实验室,石家庄050043 [2]哈尔滨工业大学先进焊接与连接国家重点实验室,哈尔滨150001

出　　处：《材料工程》2016年第2期28-34,共7页Journal of Materials Engineering

基　　金：河北省高校重点学科建设项目资助;2014年国家级大学生创新创业训练计划项目资助(201410107021)

摘　　要：采用半固态机械搅拌结合超声波振动过程制备了SiC颗粒增强的Zn-Al合金复合材料,研究了超声波作用下SiC陶瓷颗粒与液态Zn-Al合金的相互作用机制。结果表明,超声波作用在Zn基复合材料上可以在液态Zn-Al合金内产生强烈的空化作用,空化作用可以破坏Zn-Al合金表面的氧化物及陶瓷颗粒表面吸附的气膜,使Zn-Al合金润湿裸露的SiC陶瓷颗粒表面并形成冶金结合。在超声振动下,SiC颗粒与Zn-Al合金界面非常平直且洁净,没有孔洞存在,是一种润湿型结合界面。Zn-Al alloy composites reinforced with SiC particles were prepared by combining semi-solid mechanical stirring with ultrasonic vibration process. Interaction between SiC ceramic particles and liquid Zn-Al alloy with aid of ultrasonic vibration was investigated. The results show that ultrasonic vibration imposed on the Zn-based composites can cause high cavitation intensity in the liquid Zn-Al alloy which disrupts surface oxides on the Zn-Al alloy and gas films adsorbed on the particles, thereby allowing the Zn-Al alloy to wet the bare SiC ceramic particles surface and form a metallurgical bond. The interface between SiC particles and Zn-Al alloy is rather plane and clean with no voids. Which mean that a wet-type bonding interface forms between SiC particles and Zn-Al alloy under ultrasonic vibration.

关 键 词：超声波振动 SiC/Zn-Al复合材料 润湿机制 微观结构 

分 类 号：TG456.9[金属学及工艺—焊接]