Effect of Gr content and hot extrusion on the tensile properties of (nano-SiCp+Gr)/Cu composites fabricated by powder metallurgy
A novel hybrid Cu matrix composites reinforced by graphite particle (Gr) with volume fraction of 5-15% and nano-SiC particle (nano-SiCp) of 3% has been prepared by powder metallurgy.The results show that,the Gr and nano-SiCp were distributed uniformly in the Cu matrix.With increasing volume fraction of Gr,the tensile strength of the composites decrease from 114MPa to 51MPa and the elastic modulus decrease from 75GPa to 60GPa.Compared with sintered composites,the tensile properties,including elastic modulus,tensile strength,yield strength and tensile elongation of the hot-extruded (nano-SiCp+Gr)/Cu composites were 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 occurred during hot extrusion process.
Cu composites microstructure properties Gr nano-SiCp
Wang Guisong Luo Yang Liu Baoxi Yin Cheng Geng Lin
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China; School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China
国际会议
上海
英文
22-22
2012-10-19（万方平台首次上网日期，不代表论文的发表时间）