接金川

个人信息Personal Information

教授

博士生导师

硕士生导师

性别:男

毕业院校:哈尔滨工业大学

学位:博士

所在单位:材料科学与工程学院

学科:材料加工工程

办公地点:铸造中心101

联系方式:0411-84706220

电子邮箱:jiejc@dlut.edu.cn

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Microstructure and properties of TiB2 particles reinforced Cu-Cr matrix composite

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论文类型:期刊论文

发表时间:2015-05-01

发表刊物:JOURNAL OF MATERIALS SCIENCE

收录刊物:SCIE、EI、Scopus

卷号:50

期号:9

页面范围:3320-3328

ISSN号:0022-2461

摘要:Copper-chromium matrix composites reinforced by TiB2 particles were prepared by in situ reaction between titanium and copper-boron alloy in the melt. The microstructures, mechanical, and electrical properties of the composite were investigated under as-cast and aging conditions. The results indicate that the TiB2 particles are formed by in situ reaction in matrix. The addition of TiB2 in composite reduces the segregation degree of Cr particles in matrix and inhibits the coarsening of Cr particles at high aging temperature. High hardness of Cu-Cr-TiB2 composite is achieved due to the multiple hardening mechanisms, which are in situ TiB2 particles hardening and precipitation hardening from Cr particles. The wear resistance of composite presents a dramatic improvement due to the formation of TiB2 particles, and TiB2 particles have significant effect on wear mechanism of Cu-Cr-TiB2 composite. The conductivity of composite is lower than that of Cu-Cr alloy, which is attributed to higher resistivity of TiB2 particles and the incremental interface scattering caused by TiB2 particles. But the composites with high TiB2 content still have considerable conductivity after aging.