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Effect of Ball Milling on Mechanical Properties of Graphite/Copper Matrix Composites

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Abstract:

3wt% graphite/copper matrix composites had been prepared after mechanical ball milling, pressing, vacuum hot pressed sintering and hot extrusion. With tensile test, hardness test and impact test, utilizing material testing machine, Vickers hardness tester, impact machine, optical microscope and scanning electron microscopy, effect of milling time on mechanical property of graphite/copper matrix composites had been investigated. The results show that after mechanical milling and hot extrusion, microstructure had been refined, distribution of graphite phase and cohesion between copper and graphite had been improved, mechanical locking force between copper matrix and graphite, tensile strength and hardness of composites had been increased. Elongation percentage and impact absorption work are less resulting from work-hardening during ball milling.

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Periodical:

Advanced Materials Research (Volumes 217-218)

Pages:

936-940

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.217-218.936

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Online since:

March 2011

Authors:

Yong Ping Jin, Ming Hu

Keywords:

Graphite/Copper Matrix Composite, Mechanical Milling, Mechanical Property

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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