Synthesis and Characterization of In-situ Copper-Niobium Carbide Com posite


In this work, synthesis of copper matrix composite powder reinforced by in situ niobium carbide particle wasprepared by mechanical alloying of elemental powder and subsequent heat treatment. Elemental powders of Cu-Nb-Ccorrespond to Cu-40wt%Nb-1O%wtC composition was milled for 54 hours at room temperature in a planetary ball mill.The effect of heat treatment temperature on the formation of niobium carbide was analyzed. Characterization by X-raydiffraction was done on the milled powder and heat-treated powder in order to investigate NbC formation. Resultsindicate that NbC began to precipitate after mechanical alloying for about 54h with heat treatment temperature of 900°Cand lOOO°C.Keywords: X-ray diffraction, in situ composite, mechanical alloying, copper matrix composite. H. Zuhailawati R.Othmanl, D.L. Buil, M. Umemoto2I School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia,14300 Nibong Tebal, Penang, Malaysia2Department of Production Systems Engineering, Toyohashi University of Technology, Japan