Electric-discharge compaction (EDC) of nanocrystalline and coarse WC-Co powders to produce graded WC-Co cemented carbides was conducted in this work. Coarse and ultrafine graded WC-Co cemented carbides which offer high hardness and excellent fracture toughness was produced simply by EDC; the microstructure and mechanical properties of graded materials are also investigated. As a consequence of the short holding time in EDC, cobalt migration which always occurred in graded WC-Co during liquid phase sintering process due to the difference in WC grain sizes was kinetically constrained in the present study. It may offer a novel simple processing route to fabricate graded materials. (C) 2007 Elsevier Ltd. All rights reserved.
部门归属
chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;guo, jd (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;jdguo@imr.ac.cn
X. Y. Wu,J. D. Guo. Electric-discharge compaction of graded WC-Co composites[J]. International Journal of Refractory Metals & Hard Materials,2008,26(1):28-32.
APA
X. Y. Wu,&J. D. Guo.(2008).Electric-discharge compaction of graded WC-Co composites.International Journal of Refractory Metals & Hard Materials,26(1),28-32.
MLA
X. Y. Wu,et al."Electric-discharge compaction of graded WC-Co composites".International Journal of Refractory Metals & Hard Materials 26.1(2008):28-32.
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