Microstructure, mechanical and tribological properties of CrSiC coatings sliding against SiC and Al 2 O 3 balls in water

Zhiwei Wu, Fei Zhou, Kangmin Chen, Qianzhi Wang, Zhifeng Zhou, Jiwang Yan, Lawrence Kwok Yan Li

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

CrSiC coatings with different silicon contents were prepared using unbalanced magnetron sputtering via adjusting trimethylsilane (Si(CH 3 ) 3 H) flows. Their phase structure, bonding structure, microstructure and hardness were characterized by X-ray diffraction (XRD), X-ray photoelectrons spectroscopy (XPS), a field emission scanning electron microscope (FESEM) and nano-indenter, respectively. The tribological properties of CrSiC coatings sliding against SiC and Al 2 O 3 balls were investigated in water. The results showed that the CrSiC coatings were speculated to be X-ray amorphous. Although the hardness of coatings fluctuated slightly (13.2-13.8 GPa), the coatings showed poor wear resistance due to the decline of the crack resistance and toughness. Moreover, the friction coefficient (0.24-0.31) and the wear rate (2.97-7.66 × 10 -6 mm 3 /Nm) of CrSiC/SiC trobopairs were lower than those of CrSiC/Al 2 O 3 tribopairs.

Original languageEnglish
Pages (from-to)129-139
Number of pages11
JournalApplied Surface Science
Volume368
DOIs
Publication statusPublished - 2016 Apr 15

Keywords

  • CrSiC coatings
  • Hardness
  • Sliding friction
  • Surface analysis
  • Water lubrication
  • Wear

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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