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<p>Aiming to enhance hardness and wear resistance, this study employed hydride–dehydride titanium powder and graphite powder to fabricate in-situ TiC particle-reinforced titanium matrix composites. It is found that the in-situ TiC particles significantly refine the <i>α</i>-Ti grains, from 52.0 μm in pure Ti to 6.0 μm in the Ti-4.0C composite. Overall, the Ti-1.0C material exhibits the best performance, with tensile strength of 853 MPa, yield strength of 746 MPa, and elongation of 18.0%. Compared with pure Ti, the tensile strength and yield strength respectively increase by 32.2 and 48.4%, without notable elongation decrease. The strength improvement is attributed to grain refinement, solid solution strengthening, and load transfer reinforcement from TiC. Besides, the addition of graphite has a positive effect on the improvement of the hardness and wear resistance. The Ti-4.0C sample exhibits the best wear resistance, with a friction coefficient that is reduced by 30.91% compared to pure Ti sample, while the hardness increases from 18.3 to 33.9 HRC. This study provides a new approach for enhancing the comprehensive properties of titanium matrix composites.</p>

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Microstructure, Mechanical Properties, and Wear Resistance of In-Situ TiC Particle-Reinforced Titanium Matrix Composites Prepared by Vacuum Sintering and Extrusion

  • 期刊论文

  • 发表日期：

    2026年7月28日

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  • Haoxiang Zhao,
  • Fuxing Zhu,
  • Jianping Wan,
  • Zuojun Ding,
  • Kaihua Li,
  • Yuchuan Ren,
  • Xinbo He,
  • Zhimeng Guo,
  • Wenjing Zhang,
  • Cunguang Chen,
  • Fang Yang

摘要

Aiming to enhance hardness and wear resistance, this study employed hydride–dehydride titanium powder and graphite powder to fabricate in-situ TiC particle-reinforced titanium matrix composites. It is found that the in-situ TiC particles significantly refine the α-Ti grains, from 52.0 μm in pure Ti to 6.0 μm in the Ti-4.0C composite. Overall, the Ti-1.0C material exhibits the best performance, with tensile strength of 853 MPa, yield strength of 746 MPa, and elongation of 18.0%. Compared with pure Ti, the tensile strength and yield strength respectively increase by 32.2 and 48.4%, without notable elongation decrease. The strength improvement is attributed to grain refinement, solid solution strengthening, and load transfer reinforcement from TiC. Besides, the addition of graphite has a positive effect on the improvement of the hardness and wear resistance. The Ti-4.0C sample exhibits the best wear resistance, with a friction coefficient that is reduced by 30.91% compared to pure Ti sample, while the hardness increases from 18.3 to 33.9 HRC. This study provides a new approach for enhancing the comprehensive properties of titanium matrix composites.