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Abstract <p>This study examines selected aspects of the formation of nonporous ceramic-matrix composites of the BL group in the cBN–HfC system, where hafnium micropowder serves as a sintering activator. The results demonstrate that, during HPHT experiments at 2300°C, the system undergoes reactive sintering characterized by the disappearance of the metallic phase and the formation of fine-grained HfB<sub>2</sub> through two mechanisms, with a volume fraction of up to 8%.</p>

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Use of Hafnium as a Sintering Activator of BL Group Composites in the cBN–HfC System

  • 期刊论文

  • 发表日期：

    2025年10月20日

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  • D. A. Stratiichuk,
  • Ya. M. Romanenko,
  • S. P. Starik,
  • V. Z. Turkevich

摘要

Abstract

This study examines selected aspects of the formation of nonporous ceramic-matrix composites of the BL group in the cBN–HfC system, where hafnium micropowder serves as a sintering activator. The results demonstrate that, during HPHT experiments at 2300°C, the system undergoes reactive sintering characterized by the disappearance of the metallic phase and the formation of fine-grained HfB2 through two mechanisms, with a volume fraction of up to 8%.