Abstract
Thermochemical data are used to predict and examine possible production routes for WC powders by the reduction/carburisation of tungsten oxides. It is shown that the reduction route chosen may control the particle morphology of the carbide phase obtained. Further data are then used used to examine the conditions under which WC-Co composite powders may be obtained directly from CoWO4 by a similar reduction/carburisation process. The evolution of carbide phases during such processing is related to predictions of phase stabilities in the W-Co-O system at 1400 K. Experimentally, the extent of reduction/carburisation is shown to be dependent upon time, temperature and carbon activity in the gas phase.
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References
Morris, A.E., (1975), “Application of thermodynamics to metallurgical processes”, Proc. 104th AIME Anna. Meet., New York, Amer. Inst. Mech. Engrs., New York, p. 8.
Worrell, W.L., (1965), Trans. Metall. Soc. AIME, 233, 1173.
Basu, A.K. and Sale, F.R., (1977), Trans. Inst. Min. Metall., Sect. C, 86, 134 and 169.
Taskinen, P. and Tikkanen, K.H., (1977), Scand. J. Metall., 6, 228.
Basu, A.K. and Sale, F.R., (1976), in H.H. Hausner and P.V. Taubenblat (eds.), “Modern developments in powder metallurgy, Proc. Int. Powder Metall. Conf., Chicago, Volume 9, Metall. Powder Industry Federation and American Powder Metall. Inst., N.J., p. 171.
Wilken, T.R., Morcom, W.R., Wert, C.A. and Woodhouse, J.B., (1976), ibid, p. 161.
Basu, A.K. and Sale, F.R., (1978), Metall. Trans. B., 9, 603.
Newkirk, A.E. and Aliferis, (1957), J. Am. Chem. Soc., 79, 4629.
French, G.J. and Sale, F.R., (1985), Proc. 2nd Congress on cobalt, metallurgy and uses“, Venice, Cobalt Development Inst., London, p. 370.
Kim, J.W. and Chang, H.G., (1968), J. Korean Inst. Met., 6, 73.
Fornwalt, D.E., Felten, E.J. and Stonehart, P., (1975), Micron, 6, 147.
Miyake, M., Harm, A., Sho, T. and Kawakata, Y., (1978), Proc. 5th Ear. Powder Metall. Symp., Stockholm, Jernkontoret, Stockholm, p. 93.
Uhrenius, B. and Johansson, T., (1978), Met. Sci., 12, 83.
Akesson, L., (1978), Jernkontorets Forskn., D223, 1.
Rezukhina, T.N. and Kashina, T.A., (1976), J. Chem. Thermodyn., 8, 513.
Halliday, T.D., Hayes, F.H. and Sale, F.R., (1980), in T.I. Barry (ed.), “The industrial use of thermochemical data”, Sp. Publ. 34, Chemical Society, London, p. 291.
Bracconi, P. and Dufour, L.C., (1976), Metall. Trans. B., 7, 321 and 329.
French, G.J. and Sale, F.R., (1985), J. Mater. Sci., 20, 1291.
Takatsu, S., (1978), Powder Metall. Int., 10, 13.
Gortsema, F.P. and Kotval, P.S., (1976), Planseeber. Pulvermetall., 24, 254.
French, G.J., (1983), PhD Thesis, Victoria University of Manchester.
Sale, F.R., (1984), J. Less Common Metals, 100, 277.
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© 1990 Kluwer Academic Publishers
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Hayes, F.H., Sale, F.R. (1990). Thermochemical Predictions of Metal-Metal Carbide Stabilities in Relation to WC and WC-Co Production. In: Freer, R. (eds) The Physics and Chemistry of Carbides, Nitrides and Borides. NATO ASI Series, vol 185. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-2101-6_26
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DOI: https://doi.org/10.1007/978-94-009-2101-6_26
Publisher Name: Springer, Dordrecht
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