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Abstract <p>Molten-salt titanation of core–shell C/SiC composite fibers was carried out. A KCl, LiCl, and K<sub>2</sub>TiF<sub>6</sub> mixture was used as the reaction medium; the titanating agent was metallic titanium powder. The titanation conditions were 800°C and a stationary argon atmosphere. Ceramics were manufactured from the titanated fibers by hot pressing. The microstructure and phase composition of the fibers and hot-pressed samples were investigated. Ti<sub>5</sub>Si<sub>3</sub> and TiC phases were found to be formed upon titanation, and the Ti<sub>5</sub>Si<sub>3</sub> phase reacted with the carbon core of C/SiC composite fibers during hot pressing to yield titanium carbide TiC as a titanium-containing product. The increasing degree of titanation was found to decrease the porosity and insignificantly increase the strength of the hot-pressed ceramics.</p>

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Titanation of С/SiC Composite Fiber in KCl–LiCl–K2TiF6 Salt Melts and the Production of Ceramics

  • 期刊论文

  • 发表日期：

    2025年5月1日

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  • E. I. Istomina,
  • P. V. Istomin,
  • A. V. Nadutkin,
  • V. E. Grass,
  • I. M. Belyaev,
  • O. G. Baeva,
  • V. O. Tarasov,
  • E. M. Tropnicov

摘要

Abstract

Molten-salt titanation of core–shell C/SiC composite fibers was carried out. A KCl, LiCl, and K2TiF6 mixture was used as the reaction medium; the titanating agent was metallic titanium powder. The titanation conditions were 800°C and a stationary argon atmosphere. Ceramics were manufactured from the titanated fibers by hot pressing. The microstructure and phase composition of the fibers and hot-pressed samples were investigated. Ti5Si3 and TiC phases were found to be formed upon titanation, and the Ti5Si3 phase reacted with the carbon core of C/SiC composite fibers during hot pressing to yield titanium carbide TiC as a titanium-containing product. The increasing degree of titanation was found to decrease the porosity and insignificantly increase the strength of the hot-pressed ceramics.