Summary
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1.
A study was made of the atmospheric oxidation of WC-NbC-Co alloys with varying niobium carbide contents at a constant cobalt content (25 vol.%) over the temperature range 500–800°C.
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2.
It was demonstrated that the oxidation of WC-NbC-Co alloys obeys an approximately linear law, which is due to the high ratio of the volumes of the resulting oxides to the volume of the basis metal.
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3.
It was established that an addition of niobium carbide to WC-Co alloys does not increase their oxidation resistance in air at 500–800°C.
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4.
The phase composition of the oxide films forming on WC-NbC-Co alloys was determined and shown to remain practically unchanged when exposure time is increased and oxidation temperature is raised from 500–800°C.
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Literature cited
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Translated from Poroshkovaya Metallurgiya, No. 8(56), pp. 60–64, August, 1967.
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Meerson, G.A., Panov, V.S. Atmospheric oxidation resistance of WC-NbC-Co alloys. Powder Metall Met Ceram 6, 645–648 (1967). https://doi.org/10.1007/BF00774552
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DOI: https://doi.org/10.1007/BF00774552