Le , Minh Hai
(2010)
Preparation Of In-Situ Carbides Reinforced
Hybrid Copper-Based Composite By Mechanical
Alloying And Its Characterization.
Masters thesis, Universiti Sains Malaysia.
Abstract
The goal of this research work is to investigate the feasibility of the synthesis
of two distinct in-situ carbides (NbC and TiC) simultaneously in a copper matrix via
mechanical alloying and powder metallurgy from elemental powders of Cu, Nb, Ti
and graphite. Three mixtures of starting powders with compositions corresponding to
Cu-10vol.%NbC-10vol.%TiC, Cu-15vol.%NbC-15vol.%TiC and Cu-20vol.%NbC-
20vol.%TiC were mechanical alloyed using a planetary ball mill for 5, 10, 20 and 30
hours. The as-milled powders then were cold pressed at compaction pressure in range
of 500-1000 MPa and sintered in a vacuum sintering furnace for 1 hour at different
temperatures from 700 to 1000oC
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