Tribological behavior of diamond-like-carbon (DLC) coatings against aluminum alloys at elevated temperatures

Wangyang Ni, Yang Tse Cheng, Anita M. Weiner, Thomas A. Perry

Research output: Contribution to journalArticlepeer-review

97 Scopus citations

Abstract

Diamond-like-carbon (DLC) coatings have a low friction coefficient and aluminum tends not to stick with it, which makes it a promising candidate tool coating for aluminum dry machining and hot forming applications. In this work, we compared the tribological properties of hydrogenated and non-hydrogenated DLC coatings made by unbalanced magnetron sputtering. Their friction, wear, and tendency of adherence at room and elevated temperatures were studied by sliding against 319 aluminum pins. In ambient air, aluminum did not stick to hydrogenated or non-hydrogenated DLC. At elevated temperature, aluminum adhered to the non-hydrogenated DLC. Hydrogenated DLC maintained its non-sticking nature at elevated temperature but its wear resistance deteriorated. The wear mechanism of hydrogenated-DLC at elevated temperature was investigated using thermo-gravimetric analysis (TGA), elastic recoil detection (ERD), nano-indentation, and Raman analysis. The accelerated wear of hydrogenated DLC at elevated temperature was attributed to the graphitization process.

Original languageEnglish
Pages (from-to)3229-3234
Number of pages6
JournalSurface and Coatings Technology
Volume201
Issue number6
DOIs
StatePublished - Dec 4 2006

Keywords

  • Detection
  • Diamond-like-carbon
  • Dry machining
  • Elastic recoil
  • Friction
  • Nano-indentation
  • Raman
  • Thermo-gravimetric analysis
  • Wear

ASJC Scopus subject areas

  • General Chemistry
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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