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.
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
.
DOI: 10.1007/s12204-012-1341-6
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