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J. Trop. Resour. Sustain. Sci. 1 (2013) 31-34

Effect of Ball Size on Nanostructured Copper-Tungsten Carbide Composite Prepared by Mechanical Alloying

Mahani Yusoff1*, Zuhailawati H2

1Faculty of Earth Science, Universiti Malaysia Kelantan, Jeli, Kelantan, Malaysia
2School of Materials and Mineral Resources Engineering, Engineering Campus, Nibong Tebal, Penang, Malaysia

*Email Address : [email protected]

Abstract : In this study, nanostructured copper tungsten carbide composite was produced by mechanical alloying. Mechanical alloying was carried out by milling of copper (Cu), tungsten (W) and graphite mixture at 40 h with milling speed of 400 rpm in planetary ball mill using two different ball sizes. The crystallite size of the powder milled with 10 mm ball is smaller than 20 mm ball due to higher collision frequency. Lower expansion of Cu lattice was found for the powder milled with 20 mm ball than that of 10 mm ball. The composite obtain by milling with 20 mm ball had produced greater impact energy that facilitated the formation of tungsten carbide (WC).

Keywords : Copper-based ,composite ,Mechanical alloying,Nanostructured ,materials,Ball size