Microstructure and tribological properties of titanium matrix composites reinforced with in situ synthesized TiC particles

Yu Pan, Weibin Li, Xin Lu, Muhammad D. Hayat, Li Yin, Wenwen Song, Xuanhui Qu, Peng Cao

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

In this work, we prepared titanium matrix composites (TMCs) reinforced with in-situ polycarbosilane (PCS)-derived TiC particles. The effects of PCS addition on the microstructure, interface, hardness, and tribological properties were studied. The pyrolysis of PCS leads to the formation of in-situ TiC particles and Si solid-solution at a low PCS content (≤3 wt%). The TiC particles with a particle size of 4.8 μm are uniformly distributed in TMCs and have a well-bonded interface with the Ti matrix. The average grain size of α-Ti decreases from 100.5 μm in pure Ti to 16.1 μm in the Ti-3 wt% PCS composite. The presence of in situ synthesized TiC particles contributes to the excellent wear resistance of the Ti/PCS composites, which is ascribed to the increased hardness, superior load transfer capability, and oxidation wear resistance. The Ti-3 wt% PCS composite possesses the hardness of 4.72 GPa, elastic modulus of 169.23 GPa, and a low specific wear rate of 0.84 × 10−12 m3/(N·m) under constant conditions (3 N, 0.03 m/s). These values are all superior to those of Ti-6Al-4V alloy. This work sheds light on the design of high wear-resistant TMCs for industrial applications.

Original languageEnglish
Article number110633
JournalMaterials Characterization
Volume170
DOIs
Publication statusPublished - 2020 Dec

Keywords

  • Hardness
  • Microstructure
  • TiC
  • Titanium matrix composites
  • Tribological properties
  • Wear resistance

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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