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Abstract <p>The thermomechanical behavior of HfB<sub>2</sub>–SiC and (Hf<sub>0.8</sub>Ta<sub>0.2</sub>)B<sub>2</sub>–SiC ceramics hot-pressed from SHS-prepared powders was studied under compression tests at 1600 and 1800°C. The high-temperature strength for ceramics was found to reach 582–606 MPa. It was showed that ceramics based on (Hf,Ta)B<sub>2</sub> solid solution have higher plasticity as compared to samples based on HfB<sub>2</sub>, their deformation degree, ε = 0.027, is 2 times higher.</p>

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Effect of Tantalum on Deformation Behavior of HfB2–SiC Ceramics at Elevated Temperatures

  • 期刊论文

  • 发表日期：

    2025年6月23日

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  • Yu. S. Pogozhev,
  • A. Yu. Potanin,
  • E. I. Patsera,
  • E. A. Levashov,
  • K. V. Petrovskaya,
  • V. P. Vagin,
  • E. A. Bogachev,
  • A. N. Timofeev

摘要

Abstract

The thermomechanical behavior of HfB2–SiC and (Hf0.8Ta0.2)B2–SiC ceramics hot-pressed from SHS-prepared powders was studied under compression tests at 1600 and 1800°C. The high-temperature strength for ceramics was found to reach 582–606 MPa. It was showed that ceramics based on (Hf,Ta)B2 solid solution have higher plasticity as compared to samples based on HfB2, their deformation degree, ε = 0.027, is 2 times higher.