Effect of Gr Content and Hot Extrusion on Tensile Properties of (Nano-SiCp+Gr)/Cu Composites Fabricated by Powder Metallurgy

doi:10.1007/s12204-012-1341-6

上海交通大学学报（英文版） ›› 2012, Vol. 17 ›› Issue (6): 658-662.doi: 10.1007/s12204-012-1341-6

Effect of Gr Content and Hot Extrusion on Tensile Properties of (Nano-SiCp+Gr)/Cu Composites Fabricated by Powder Metallurgy

WANG Gui-songa,b* (王桂松), LUO Yanga (罗阳), LIU Bao-xia (刘宝玺),YIN Chenga (尹成), GENG Lina (耿林), HUANG Yu-dongb (黄玉东)

(aSchool of Materials Science and Engineering; b. School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin 150001, China)

出版日期:2012-12-31 发布日期:2012-12-30
通讯作者: WANG Gui-songa,b* (王桂松) E-mail: wangguisong@hit.edu.cn

Effect of Gr Content and Hot Extrusion on Tensile Properties of (Nano-SiCp+Gr)/Cu Composites Fabricated by Powder Metallurgy

WANG Gui-songa,b* (王桂松), LUO Yanga (罗阳), LIU Bao-xia (刘宝玺),YIN Chenga (尹成), GENG Lina (耿林), HUANG Yu-dongb (黄玉东)

(aSchool of Materials Science and Engineering; b. School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin 150001, China)

Online:2012-12-31 Published:2012-12-30
Contact: WANG Gui-songa,b* (王桂松) E-mail: wangguisong@hit.edu.cn

摘要/Abstract

摘要： Novel hybrid Cu matrix composites reinforced by graphite (Gr) particle with volume fraction of 5%— 15% and nano-SiC particle (nano-SiCp) with volume fraction of 3% have been prepared by powder metallurgy. The results show that Gr and nano-SiCp distribute uniformly in the Cu matrix. With increasing the volume fraction of Gr, the tensile strength of the composites decreases from 114 to 51MPa and the elastic modulus decreases from 75 to 60GPa. Compared with the sintered composites, the tensile properties including elastic modulus, tensile strength, yield strength and tensile elongation of the hot-extruded (nano-SiCp+Gr)/Cu composites are improved greatly due to higher relative density of the composites and more uniform distribution of Gr and nano-SiCp, in addition to finer grain size of the matrix as a result of dynamic recovery and recrystallization which occur during hot extrusion process.

关键词: Cu composites, microstructure, properties, graphite, nano-SiC particle (nano-SiCp)

Abstract: Novel hybrid Cu matrix composites reinforced by graphite (Gr) particle with volume fraction of 5%— 15% and nano-SiC particle (nano-SiCp) with volume fraction of 3% have been prepared by powder metallurgy. The results show that Gr and nano-SiCp distribute uniformly in the Cu matrix. With increasing the volume fraction of Gr, the tensile strength of the composites decreases from 114 to 51MPa and the elastic modulus decreases from 75 to 60GPa. Compared with the sintered composites, the tensile properties including elastic modulus, tensile strength, yield strength and tensile elongation of the hot-extruded (nano-SiCp+Gr)/Cu composites are improved greatly due to higher relative density of the composites and more uniform distribution of Gr and nano-SiCp, in addition to finer grain size of the matrix as a result of dynamic recovery and recrystallization which occur during hot extrusion process.

Key words: Cu composites, microstructure, properties, graphite, nano-SiC particle (nano-SiCp)

中图分类号:

TG 146

WANG Gui-songa,b* (王桂松), LUO Yanga (罗阳), LIU Bao-xia (刘宝玺),YIN Chenga (尹成), GENG. Effect of Gr Content and Hot Extrusion on Tensile Properties of (Nano-SiCp+Gr)/Cu Composites Fabricated by Powder Metallurgy[J]. 上海交通大学学报（英文版）, 2012, 17(6): 658-662.

WANG Gui-songa,b* (王桂松), LUO Yanga (罗阳), LIU Bao-xia (刘宝玺),YIN Chenga (尹成), GENG Lina (耿林), HUANG Yu-dongb (黄玉东). Effect of Gr Content and Hot Extrusion on Tensile Properties of (Nano-SiCp+Gr)/Cu Composites Fabricated by Powder Metallurgy[J]. Journal of shanghai Jiaotong University (Science), 2012, 17(6): 658-662.

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Effect of Gr Content and Hot Extrusion on Tensile Properties of (Nano-SiCp+Gr)/Cu Composites Fabricated by Powder Metallurgy

Effect of Gr Content and Hot Extrusion on Tensile Properties of (Nano-SiCp+Gr)/Cu Composites Fabricated by Powder Metallurgy

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