High-temperature Hardness of Submicron WC-Co Hardmetals Containing Various Additional Carbides.

Fine Grained and Functionally Graded Cemented Carbides

“…It was observed that the ball milled carbide powders showed a narrow particle distribution, nearly the same as that of commercial powders for preparing submicron hardmetals. Asada et al [18] studied the role of a 1% carbide (ZrC, VC, Mo2C, Cr3C 2 and TaC) addition on the properties of WC-8 Co hardmetals. Each carbide addition affected grain refinement which also increased the hardness.…”

Doping Method of Grain Growth Inhibitors for Strengthening Nanophase WC/Co

“…Generally, grain growth inhibitors, which alter the interfacial energy and effect the degree of interfacial dissolusion and reprecipitation, have been used to reduce the growth rate of WC particles. [3][4][5] Transition metal carbide such is VC, TaC, or mixed carbides are known as inhibitors. Compared with the submicron WC/Co to restrict the grain growth of the WC, the nanophase WC/Co requires a relatively large amount of inhibitors due to the large interfacial area.…”