活性元素Al对超声波钎焊Mo接头组织和力学性能的影响规律

doi:10.11896/cldb.19060179

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Abstract In order to solve the problem of short service life of Ag-coated Mo interconnects for solar cell of spacecraft due to atomic oxygen erosion, pure Mo was soldered with low temperature Sn-based solder under atmospheric environment, 300 ℃ and without flux by adding active Al element and applying ultrasonic activation soldering method. The effect of Al content in Sn-based solders on the microstructure, element distribution at interface and mechanical properties of ultrasonic soldered Mo joints was studied. The results showed that the interfacial bonding strength was low and the joint fractured from the interface without Al element in the filler metal. With the increase of Al content in the filler metal, the segregation of Al element at the interface increases, the interfacial compound changes from Al₅Mo to Al₁₂Mo, and the shear strength of the joint increases gra-dually. When the Al content was 10%, the shear strength of the joint reached 33.36 MPa, and the joint fractured from the soldering seam.

Key words： molybdenum ultrasonic soldering Al activation microstructure mechanical properties

Published: 06 November 2020

CLC number:	TG425
	TG454

Fund:Science and Technology Research Project of Hebei Province Colleges and Universities-Youth Fund Project (QN2019028), Natural Science Foundation of Hebei Province (E2019202407).

About author:: Haitao Xue, Ph.D., associate professor of Hebei University of Technology, master’s tutor. Mainly engaged in the research of welding of dissimilar materials. Published more than 20 papers.
Weibing Guo, lecturer, master’s tutor, graduated from Harbin Institute of Technology in 2018 with a doctorate in engineering. In the same year, he entered the Hebei University of Technology and has been working on the theory and application of ultrasonic solering.

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	XUE Haitao
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Cite this article:

XUE Haitao,WEI Xin,GUO Weibing, et al. Effect of Active Element Al on Microstructure and Mechanical Properties of Ultrasonic Soldered Mo Joints[J]. Materials Reports, 2020, 34(20): 20103-20106.

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http://www.mater-rep.com/EN/10.11896/cldb.19060179 OR http://www.mater-rep.com/EN/Y2020/V34/I20/20103

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