Effects of rare earth La on microstructure and properties of Ag-21Cu-25Sn alloy ribbon prepared by melt spinning

Ma, Xue and Li, Liangfeng and Zhang, Zuhua and Wang, Hao and Wang, Enze and Qiu, Tai (2015) Effects of rare earth La on microstructure and properties of Ag-21Cu-25Sn alloy ribbon prepared by melt spinning. Materials and Design, 83. pp. 1-5. ISSN 0264-1275

Abstract

Ag-21Cu-25Sn alloy ribbon as a promising intermediate temperature alloy solder (400-600°C) was prepared by melt spinning technique in this paper. Rare earth La was added into Ag-21Cu-25Sn alloy to refine the microstructures and improve the wettabilities of as-prepared alloy solders. The phase constitutions, microstructures, melting temperatures and wettabilities of selected specimens were respectively tested. The results showed that the dominant phase constitutions of Ag-21Cu-25Sn-xLa alloy ribbons were Ag3Sn and Cu3Sn. The grain size of Ag-21Cu-25Sn-xLa alloy decreased with the addition of La increasing. La addition reduced the melting temperatures of Ag-21Cu-25Sn-xLa alloy ribbons, and effectively improved the wettabilities of the alloy ribbons. When the addition of La was 0.5wt%, the wettability of as-prepared alloy solder achieved the optimal value of 158cm2g-1 under brazing temperature 600°C and dwell time 15min. In addition, raising brazing temperature and prolonging dwell time could improve the wettability of Ag-21Cu-25Sn-xLa alloy ribbon.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2015 Elsevier Ltd. Permanent restricted access to Published version in accordance with the copyright policy of the publisher.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering
Date Deposited: 24 Feb 2016 06:27
Last Modified: 02 Aug 2016 04:52
Uncontrolled Keywords: Ag–Cu–Sn alloy; rare earth La; melting temperature; wettability; melt spinning technique
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090503 Construction Materials
03 Chemical Sciences > 0306 Physical Chemistry (incl. Structural) > 030602 Chemical Thermodynamics and Energetics
09 Engineering > 0912 Materials Engineering > 091207 Metals and Alloy Materials
Identification Number or DOI: 10.1016/j.matdes.2015.05.083
URI: http://eprints.usq.edu.au/id/eprint/28890

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