Microstructure and properties of Ag-Ti3SiC2 contact materials prepared by pressureless sintering

被引：30

作者：

Zhang, Min ^{[1
]}

Tian, Wu-bian ^{[1
]}

Zhang, Pei-gen ^{[1
]}

Ding, Jian-xiang ^{[1
]}

Zhang, Ya-mei ^{[2
]}

Sun, Zheng-ming ^{[1
]}

机构：

[1] Southeast Univ, Sch Mat Sci & Engn, Jiangsu Key Lab Adv Metall Mat, Nanjing 211189, Jiangsu, Peoples R China

[2] Southeast Univ, Sch Mat Sci & Engn, Jiangsu Key Lab Construct Mat, Nanjing 211189, Jiangsu, Peoples R China

来源：

INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS | 2018年 / 25卷 / 07期

基金：

中国国家自然科学基金;

关键词：

MAX phase; Ag-Ti3SiC2; contact materials; wettability; pressureless sintering; MECHANICAL-PROPERTIES; TI3SIC2; COMPOSITES; TI3ALC2; CU; TEMPERATURE; FABRICATION; POWDERS; STABILITY; BEHAVIOR;

D O I：

10.1007/s12613-018-1629-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ti3SiC2-reinforced Ag-matrix composites are expected to serve as electrical contacts. In this study, the wettability of Ag on a Ti3SiC2 substrate was measured by the sessile drop method. The Ag-Ti3SiC2 composites were prepared from Ag and Ti3SiC2 powder mixtures by pressureless sintering. The effects of compacting pressure (100-800 MPa), sintering temperature (850-950A degrees C), and soaking time (0.5-2 h) on the microstructure and properties of the Ag-Ti3SiC2 composites were investigated. The experimental results indicated that Ti3SiC2 particulates were uniformly distributed in the Ag matrix, without reactions at the interfaces between the two phases. The prepared Ag-10wt%Ti3SiC2 had a relative density of 95% and an electrical resistivity of 2.76 x 10(-3) m Omega center dot cm when compacted at 800 MPa and sintered at 950A degrees C for 1 h. The incorporation of Ti3SiC2 into Ag was found to improve its hardness without substantially compromising its electrical conductivity; this behavior was attributed to the combination of ceramic and metallic properties of the Ti3SiC2 reinforcement, suggesting its potential application in electrical contacts.

引用

页码：810 / 816

页数：7

共 32 条

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