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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container_issue 3
container_start_page 304
container_title Refractories and industrial ceramics
container_volume 58
creator Sokolov, P. S
Arakcheev, A. V
Mikhal'chik, I. L
Plyasunkova, L. A
Georgiu, I. F
Frolova, T. S
Mironov, R. A
description 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.
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