Effect of preparation method and heat treatment on microstructure and properties of Cu-Ni-Si alloy

被引：0
|
作者：
Tao, Shiping [1 ,2 ]
Lu, Zhenlin [1 ]
Xie, Hui [2 ]
Zhang, Jinlong [2 ]
Wei, Xin [2 ]
机构：
[1] Xian Univ Technol, Sch Mat Sci & Engn, Xian 710084, Peoples R China
[2] Xian Aeronaut Univ, Sch Mat Engn, Xian 710077, Peoples R China
来源：
MATERIALS LETTERS | 2022年 / 315卷
基金：
美国国家科学基金会;
关键词：
Cu-Ni-Si alloys; Hot pressing sintering; Aging treatment; Miacrostructure; Metallurgy; EVOLUTION;
D O I：
10.1016/j.matlet.2022.131790
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this work, Cu-Ni-Si alloy was prepared by hot-pressing sintering using Cu, Ni, and Si powders as raw material. The alloy was afterwards exposed to solution treatment at 900 degrees C for 2 h and aging at 450 degrees C for 4 h. The microstructural analysis revealed that the alloy was mainly composed of the granular Ni31Si12 phase at the grain boundaries and the fine delta-Ni31Si phase inside the grains after hot-pressing sintering. After solution treatment, the Ni2Si phase disappeared completely while a small quantity of Ni31Si12 was still observed. However, there was a large amount of fibrous delta-Ni2Si precipitates after aging. The mechanical properties and electrical conductivity of the alloy were tested as well. After aging, the alloy exhibited the best comprehensive characteristics with the hardness of 248.6 HV and the conductivity of 40% IACS. Therefore, the banded structure of Cu-Ni-Si alloys prepared by powder metallurgy and subjected to aging exerts a positive influence on their properties.
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页数：4
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