Abstract
The reduction of two different samples of copper tungstate at 500, 600 and 700° C has been studied using thermogravimetry, X-ray diffraction analysis and electron optical techniques. The morphologies of the resultant Cu-W powders have been related to the morphologies of the original tungstate samples and to the time and temperatures of reduction. The reduction mechanism of the tungstate has been shown to be equivalent to the reduction of pure tungsten oxides once the initial metallic copper phase has been produced. The end products of reduction are mixtures of β-W and Cu at 500° C and α-W and Cu at 600 and 700° C.
Similar content being viewed by others
References
A. K. Basu andF. R. Sale,Trans. Inst. Min. Metall. 86 (1977) C134.
Idem, ibid. 86 (1977) C169.
J. Guerassimov, Proceedings of the 16th IUPAC International Congress of Pure and Applied Chemistry Paris (Butterworth, London, 1957) p. 227.
P. Bracconi andL. C. Dufour,Met. Trans. 7B (1976) 321.
Idem, ibid. 7B (1976) 329.
A. K. Basu andF. R. Sale,J. Mater. Sci. 12 (1977) 1115.
G. R. St. Pierre, W. T. Ebihara, M. J. Pool andR. Speiser,Trans. AIME 224 (1962) 259.
G. Mannella andJ. O. Hougen,J. Phys. Chem. 60 (1956) 1148.
W. R. Morcom, W. L. Worrell, H. G. Sell andH. I. Kaplan,Met. Trans. 5 (1974) 155.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Basu, A.K., Sale, F.R. Copper-tungsten composite powders by the hydrogen reduction of copper tungstate. J Mater Sci 13, 2703–2711 (1978). https://doi.org/10.1007/BF02402759
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02402759