Microstructure and Mechanical Properties of Cu Matrix Composites Reinforced by TiB2/TiN Ceramic Reinforcements

被引：18

作者：

Yin, Jinwei ^{[1
]}

Zhou, Peilong ^{[1
,2
]}

Liang, Hanqin ^{[1
]}

Yao, Dongxu ^{[1
]}

Xia, Yongfeng ^{[1
]}

Zuo, Kaihui ^{[1
]}

Zeng, YuPing ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China

来源：

ACTA METALLURGICA SINICA-ENGLISH LETTERS | 2020年 / 33卷 / 12期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

Cu matrix composite; Microstructure; Mechanical property; Self-propagating high-temperature synthesis (SHS); PARTICLE-SIZE; TENSILE PROPERTIES; WEAR BEHAVIOR; TEMPERATURE; FRACTURE; STRESS; CARBON;

D O I：

10.1007/s40195-020-01100-5

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Cu matrix composites reinforced by TiB2/TiN ceramic reinforcements (Cu/TBN composites) were prepared by hot pressing method. Prior to the hot pressing, Cu/TiB2/TiN composite powders (CTBN powders), which were used as the starting materials of Cu/TBN composites, were fabricated by self-propagating high-temperature synthesis method. The CTBN particles were found to be in a special core-shell structure with a Cu-Ti alloy core and a TiB2/TiN ceramic shell. The test results presented obvious improvements in mechanical properties. The highest ultimate tensile strength reached up to 297 MPa, 77 MPa higher than that of Cu. And the highest hardness reached up to 70.7 HRF, 15.7 HRF higher than that of Cu. A comparative study indicated that the core-shell structured particles could bring about more obvious strengthening effect than the traditional irregularly shaped particles, which was due to the improved Cu/ceramics interfacial bonding, the linkage strengthening effect of both TiB(2)and TiN, and higher load bearing ability of the core-shell structured reinforcements.

引用

页码：1609 / 1617

页数：9

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