Ultra-High-Temperature Ceramics Based on HfB.sub.2 - 30% SiC: Production and Basic Properties

Ultra-High-Temperature Ceramics Based on HfB.sub.2 - 30% SiC: Production and Basic Properties

Dense HfB.sub.2- 30 vol.% SiC ceramics were obtained from commercially available powders by the hot-pressing method. Their basic physicomechanical properties were measured: the flexural strength at room temperature was 300 - 700 MPa, the Vickers microhardness reached 20 GPa, the critical stress inte...

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Veröffentlicht in:Refractories and industrial ceramics 2017-09, Vol.58 (3), p.304
Hauptverfasser: Sokolov, P. S, Arakcheev, A. V, Mikhal'chik, I. L, Plyasunkova, L. A, Georgiu, I. F, Frolova, T. S, Mironov, R. A
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Sprache:eng
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Zusammenfassung:Dense HfB.sub.2- 30 vol.% SiC ceramics were obtained from commercially available powders by the hot-pressing method. Their basic physicomechanical properties were measured: the flexural strength at room temperature was 300 - 700 MPa, the Vickers microhardness reached 20 GPa, the critical stress intensity factor was up to 5.9 MPa·m.sup.1/2. Thermal expansion and resistance to oxidation were measured in a wide temperature range.
ISSN:1083-4877
DOI:10.1007/s11148-017-0101-4