Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1604607 | International Journal of Refractory Metals and Hard Materials | 2008 | 5 Pages |
Abstract
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.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Xiyong Wu, Jingdong Guo,