Abstract
1. An investigation was carried out into the sintering of hard alloys containing the complex carbides ZrC-WC and HfCx≤1-WC in various atmospheres. It was established that, irrespective of the type of packing material employed, alloy specimens rupture during sintering at temperatures of 400–1520‡C in hydrogen and argon atmospheres of commercial purity. 2. It is shown that the rupture of specimens is mainly due to the presence of water vapor and oxygen in the heating chamber of the furnace, which oxidize the zirconium and hafnium carbides in the solid solutions, bringing about a change in the volume of the constituents. 3. Sintering in a hydrogen atmosphere of spectral purity and in a vacuum does not lead to specimen rupture and makes it possible to produce dense alloys with a satisfactory structure.
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