期刊
MATERIALS
卷 15, 期 7, 页码 -出版社
MDPI
DOI: 10.3390/ma15072340
关键词
tungsten carbide; in situ formation; copper matrix composite; mechanical alloying
类别
资金
- Research University Postgraduate Research Student Grant Scheme of Universiti Sains Malaysia [1001/PBAHAN/8041003]
- National Science Fund
- Ministry of Science, Technology and Innovation (MOSTI) Malaysia
An in situ nanostructured copper tungsten carbide composite was synthesized by mechanical alloying and powder metallurgy. Tungsten carbide phases (WC and W2C) were only present after mechanical alloying and sintering. The formation of WC was influenced by the energy associated with longer milling time. The formation of W2C and WC resulted from internal refinement due to heavy plastic deformation in the composite.
In this study, an in situ nanostructured copper tungsten carbide composite was synthesized by mechanical alloying (MA) and the powder metallurgy route. The microstructure and phase changes of the composite were characterized by X-ray diffraction, scanning electron microscopy and X-ray photoelectron spectroscopy. Tungsten carbide phases (WC and W2C) were only present after MA and combination of sintering. Higher energy associated with a longer milling time was beneficial for the formation of WC. Formation of W2C and WC resulted from internal refinement due to heavy plastic deformation in the composite. The solubility of the phases in the as-milled and sintered composite was described by the changes of the lattice parameter of Cu. Chemical analysis of the surface of a composite of W 4f and C 1s revealed that the increased defects introduced by MA affect the atomic binding of the W-C interaction.
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