Structure, Mechanical Properties, and High-Temperature Stability of ZrB2- and HfB2-Based Materials
Journal of Superhard Materials(2023)
Abstract
The structure, mechanical characteristics, and high-temperature stability in vacuum and air of ZrB2 and HfB2-based materials sintered at a high quasi-hydrostatic pressure (4.1 GPa) under hot pressing (at a pressure of 30 MPa) with and without SiC and Si3N4 additives have been studied. It has been shown that short-term sintering (4 min) under high pressure conditions and at a comparatively low temperature (1800°C) essentially improves the mechanical properties of these materials as compared to the similar materials synthesized by the other method (hot pressing and spark-plasma sintering). In the case of sintering at a high pressure (4.1 GPa), the addition of 20 wt
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Key words
refractory borides,SiC,Si3N4,composites,ultrahigh-temperature materials,high-pressure high-temperature sintering,hot pressing,electron microscopy,mechanical properties,melting temperature in vacuum,high-temperature oxidation resistance
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