Separation of Phases in Some Carbide Systems
The solubility of WC in ZrC and TiC was redetermined. Tungsten carbide precipitated from (W, Zr)C and (W, Ti)C solid solutions as well alligned ribbon-shaped particles. The crystallographic orientation of the hexagonal precipitate and cubic matrix established by electron diffraction techniques is h | | and h | | c. The interfacial planes were (001) for WC and (111) for the cubic matrix. The rate of precipitation of WC from solid solutions follows a square root time-dependence. An apparent orthorhombic symmetry for the precipitated WC from (W, Ti)C solid solutions was observed. An increase in the microhardness to ~23% was observed in the phase separated materials.
KeywordsSolid Solution Tungsten Carbide Interfacial Plane Electron Diffraction Technique Knoop Microhardness
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- 1.J. W. Christian, Theory of Transformations in Metals and Alloys Pergamon Press, Oxford, 1965.Google Scholar
- 2.M. E. Fine, in Advances in Materials Research, Vol. 4 edited by H. Herman, Interscience Publishers Inc., New York, 1974.Google Scholar
- 4.P. Schwarzkopf and R. Kieffer, Refractory Hard Metals The MacMillan Co., New York, 1953.Google Scholar
- F. Trombrel, in Plansee Proc., Pap. Plansee Senia. De Re Natal. 2nd, 1955, 1956, 205.Google Scholar
- 7.A. G. Metcalfe, J. Inst. Met. 73 (1947) 591.Google Scholar
- 8.T. Shulishova and I. A. Shcherbak, Poroshk. Metall. 6 (1967) 16.Google Scholar