Tungsten carbides and W-C phase diagram
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- 1 February 2006
- journal article
- Published by Pleiades Publishing Ltd in Inorganic Materials
- Vol. 42 (2), 121-127
- https://doi.org/10.1134/s0020168506020051
Abstract
The crystal structures of the tungsten monocarbide δ-WC and the disordered lower carbide β-W2C are studied. Using magnetic susceptibility measurements, the hexagonal carbide δ-WC is shown to be stable from 300 to 1200 K. The sequence of phase transformations associated with β-W2C ordering is analyzed. The temperature and composition stability limits of the cubic carbide γ-WC1−x are evaluated, and the first data are presented on the variation of its lattice parameter with composition. An optimized W-C phase diagram is proposed which takes into account detailed structural and phase-equilibrium data for tungsten carbides.Keywords
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