Huang Zheyuan, Du Huiqiao, Liu Lei, Lai Zhiwei, Chen Xiaoguang, Long Weimin, Wang Wenxian, Zou Guisheng
College of Materials Science and Engineering, Shanxi Key Laboratory of Advanced Magnesium-based Materials, Taiyuan University of Technology, Taiyuan, Shanxi 030024, PR China; Department of Mechanical Engineering, Key Laboratory for Advanced Manufacturing by Materials Processing Technology, Tsinghua University, Beijing 100084, China.
Beijing Spacecraft Manufacturing Factory, Beijing 100190, China.
Ultrason Sonochem. 2018 May;43:101-109. doi: 10.1016/j.ultsonch.2017.11.022. Epub 2018 Feb 4.
The effect of ultrasound on transient liquid phase bonding of SiC reinforced Mg metal matrix composites was investigated based on microstructure evolution, phase composition, SiC particles redistribution, mechanical properties and fracture path of the bonded joint. The results indicate the joint of full solid solution without SiC particles aggregation was obtained by inducing the secondary ultrasonic-assisted holding process at 430 °C for 30 s and the joint shear strength reach to 175.5 MPa (87.5% base material strength). The time needed for the isothermal solidification process was significantly shortened to several second time, which is mainly ascribed to the ultrasonic vibration can squeeze out a large fraction of residual liquid phase and facilitate the atomic diffusion in grain boundary.
基于结合接头的微观结构演变、相组成、碳化硅颗粒再分布、力学性能和断裂路径，研究了超声对碳化硅增强镁基金属基复合材料瞬态液相连接的影响。结果表明，通过在430℃下进行30s的二次超声辅助保温处理，获得了无碳化硅颗粒聚集的完全固溶体接头，接头剪切强度达到175.5MPa（为母材强度的87.5%）。等温凝固过程所需时间显著缩短至几秒，这主要归因于超声振动能够挤出大部分残余液相并促进晶界处的原子扩散。
