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Study on Effect of Different Preparation Process Parameters on Properties and Microstructure of SiO2/Cu Composites

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Abstract:

The SiO2 nanoparticles reinforced Cu-matrix composites were prepared by powder metallurgy technology．The influences of SiO2 volume fraction on the properties of hardness、conductivitity rate and wear behavior of Cu-matrix composites were studied. The results showed that conductivity rate was decreased with the increase of the SiO2 volume fraction；whereas the hardness was increased, then decreased and wear behavior was increased. Sintering an hour of performance was superior to the sintering half an hour.When SiO2 nanoparticle volume fraction was achieved 2.5%, comprehensive properties of SiO2/Cu composite were obviously increased.The microstructures revealed that the second phase particles precipitated dispersedly in copper matrix after hot extrusion. with the increase of the strengthen phase particle volume fraction, nanoparticles appeared together and gathered in grain boundary of copper matrix.

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Periodical:

Applied Mechanics and Materials (Volumes 117-119)

Pages:

908-912

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.117-119.908

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Online since:

October 2011

Authors:

Cui Hua Zheng, Ke Xing Song, Xiu Hua Guo, Yan Jun Zhou

Keywords:

Conductivity Rate, Hardness, Powder metallurgy, SiO2 Nanoparticle, Wear Behavior

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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