Mechanical and tribological properties of boron, nitrogen-coincorporated diamond-like carbon films prepared by reactive radio-frequency magnetron sputtering

H. Nakazawa, A. Sudoh, M. Suemitsu, K. Yasui, T. Itoh, T. Endoh, Y. Narita, M. Mashita

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We have deposited boron- and/or nitrogen-incorporated DLC films by radio-frequency magnetron sputtering, and systematically investigated the structure and the mechanical and tribological properties. The N content in DLC films increased with increasing N2 flow ratio [N2/(Ar + N2)], and it tended to be saturated at higher N2 flow ratios. The N content further increased with an increase in the B content of the targets. The B/C ratios of the films were almost the same as those of the B-containing targets regardless of the N content. Scratch tests revealed that the adhesion strength of N-incorporated DLC films decreased with increasing N2 flow ratio and the critical loads of B-incorporated films were lower than that of an unincorporated film. It was found that for B, N-coincorporated films there was an optimum N2 flow ratio at which the critical load became a maximum value, which was higher than that of the unincorporated film. The optimum N2 flow ratio increased with an increase in the B composition of the targets. The N-incorporated films peeled off during ball-on-plate friction tests. On the other hand, the B, N-coincorporated films showed good wear-resistant properties that the specific wear rates were lower than those of the unincorporated and B-incorporated films.

Original languageEnglish
Pages (from-to)503-506
Number of pages4
JournalDiamond and Related Materials
Volume19
Issue number5-6
DOIs
Publication statusPublished - 2010 May 1

Keywords

  • Boron
  • Diamond-like carbon
  • Magnetron sputtering
  • Nitrogen

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Chemistry(all)
  • Mechanical Engineering
  • Materials Chemistry
  • Electrical and Electronic Engineering

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