Article ID Journal Published Year Pages File Type
1604734 International Journal of Refractory Metals and Hard Materials 2007 10 Pages PDF
Abstract

The effect of composition, sintering temperature and time on the properties of (Hf, Ti) C hardmetals are investigated. Sintered samples were hot pressed from HfC0.7 and TiC0.9 carbide powder using powder metallurgical techniques. Ni was used as a binder in selected samples and C black was added to compensate for sub-stoichiometry and to aid in the reduction of oxides formed during milling. Hardness, fracture toughness and density decrease with increasing amounts of C in the starting powder. No change in hardness or fracture toughness (within experimental error) is observed with increasing Ni concentration from 0 to 8 wt%. The best combination of hardness and toughness attained in this investigated is 23 GPa and 10 MPam1/2, respectively, in a sample consisting of 82.7 wt% HfC + 17.3 wt% TiC + 4 wt% Ni.

Related Topics
Physical Sciences and Engineering Materials Science Metals and Alloys
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