Ultra-High-Temperature Ceramics Based on HfB2 – 30% SiC: Production and Basic Properties
Dense HfB2– 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·m1/2. Thermal expansion and resistance to oxidation were measured in a wide temperature range.
Keywordsultra-high-temperature ceramics (UHTCs) ceramics based on HfB2–SiC hot pressing (HP) hafnium diboride silicon carbide
The authors thank N. A. Golubeva, G. M. Bagreeva, P. Yu. Yakushkia, and A. P. Metleva for their help and assistance in carrying out the research work.
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