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The reduction of WC into W by reaction with a Hf–Cu melt has been found to proceed by the formation of layers of W and HfC. The extent of such incongruent WC reduction has been examined after the immersion of dense, polycrystalline WC plates in a vertical orientation in Hf–Cu melts at 1150–1300°C for 1–24h. A W layer of uniform thickness formed adjacent to the WC, whereas an irregular, but generally...
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