Enhancement of tribological properties of DLC by incorporation of amorphous titanium using magnetron sputtering process

Vishnu Shankar Dhandapani, Kyoung Mo Kang, Kuk Jin Seo, Chang Lae Kim, Dae Eun Kim

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Titanium-diamond-like carbon (Ti-DLC) composite coatings were deposited on 304 SUS substrates by periodic sputtering of Ti in between DLC deposition with different Ti target powers using a magnetron sputtering system. Microstructure as well as the mechanical and tribological properties of the Ti-DLC composite coatings were highly dependent on the Ti target power which was varied from 75 to 150 W. Transmission electron microscopy (TEM) confirmed that the Ti atoms in DLC coatings were in an amorphous state which was beneficial for deterring crack nucleation within the coating. Furthermore, premature delamination of a pure DLC coating with a thickness of ∼330 nm could be prevented by inclusion of Ti in DLC. All the Ti-DLC composite coatings were capable of drastically enhancing the friction and wear properties of bare 304 SUS. The coating deposited with a target power of 85 W showed the highest wear resistance with a wear rate of ∼3.13 × 10 −11 mm 3 /N mm, which was extremely low for a dry sliding condition. This outcome was attributed to ultra-fine distribution of amorphous Ti in DLC which led to low internal stress and high I D /I G ratio of the coating.

Original languageEnglish
Pages (from-to)11971-11981
Number of pages11
JournalCeramics International
Volume45
Issue number9
DOIs
Publication statusPublished - 2019 Jun 15

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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