Microstructure and melting properties of Ag–Cu–In intermediate-temperature brazing alloys

Ma, Xue and Li, Liang-Feng and Zhang, Zu-Hua and Wang, Hao and Wang, En-Ze and Qiu, Tai (2015) Microstructure and melting properties of Ag–Cu–In intermediate-temperature brazing alloys. Rare Metals, 34 (5). pp. 324-328. ISSN 1001-0521


Abstract

The microstructure and melting properties of ternary Ag–Cu–In intermediate-temperature alloys (400–600 °C) prepared by electric arc melting were investigated in this work. The melting properties, phase compositions, microstructure and hardness were characterized by differential scanning calorimetry (DSC), X-ray diffraction (XRD), scanning electron microscopy (SEM) and micro-hardness tester, respectively. The results show that the melting properties, phase compositions, microstructure and hardness of Ag–Cu–In brazing alloys are substantially different when adding different levels of indium. Indium element could effectively reduce the melting temperatures of (Ag–Cu28)–xIn alloys, and the melting temperatures of (Ag–Cu28)–25In alloy are located at 497.86 and 617.48 °C. When the indium content varies from 5 wt% and 10 wt%, the dominant phases in the alloys are Ag-rich and Cu-rich phases, and their granular crystals are smaller than 0.5 µm. When the indium content is higher than 15 wt%, the phase compositions of the alloy are Ag4In and Cu11In9, and the microstructure exhibits dendritic crystals with a uniform distribution. The hardness of (Ag–Cu28)–xIn alloy decreases first and then increases with the content of indium increasing, and the highest hardness of (Ag–Cu28)–25In alloy is HV 266.0.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 15 Mar 2022 22:29
Last Modified: 10 Apr 2022 09:04
Uncontrolled Keywords: Ag–Cu–In alloy; Arc melting; Hardness; Melting property; Microstructure
Fields of Research (2008): 09 Engineering > 0912 Materials Engineering > 091207 Metals and Alloy Materials
Fields of Research (2020): 40 ENGINEERING > 4016 Materials engineering > 401607 Metals and alloy materials
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Socio-Economic Objectives (2020): 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280110 Expanding knowledge in engineering
Identification Number or DOI: https://doi.org/10.1007/s12598-015-0484-7
URI: http://eprints.usq.edu.au/id/eprint/46345

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