Authors: Xue Ma LiangFeng Li ZuHua Zhang Hao Wang EnZe Wang Tai Qiu
Publish Date: 2015/04/22
Volume: 34, Issue: 5, Pages: 324-328
Abstract
The microstructure and melting properties of ternary Ag–Cu–In intermediatetemperature 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 Xray diffraction XRD scanning electron microscopy SEM and microhardness 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 49786 and 61748 °C When the indium content varies from 5 wt and 10 wt the dominant phases in the alloys are Agrich and Curich phases and their granular crystals are smaller than 05 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 2660This study was financially supported by the Open Project of State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials No 11zxfk13 the Scientific Research Fund of Sichuan Provincial Education Department No 14ZB0103 and the China Scholarship Council CSC
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