Laser surface alloying of copper with titanium: Part I. Electrical wear resistance in dry condition. Part II. Electrical wear resistance in wet and corrosive condition

C. T. Kwok, P. K. Wong, Hau Chung Man

Research output: Journal article publicationJournal articleAcademic researchpeer-review

9 Citations (Scopus)

Abstract

A high-power diode laser was used for alloying titanium on commercially pure copper (cp Cu) for enhancing electrical sliding wear in air. Microstructure and phases present were analyzed using scanningelectron microscopy and X-ray diffraction, respectively. Electrical sliding wear tests in air were conducted with a pin-on-disc tribometer with andwithout electric current. The electrical slidingwear resistances of all laser-alloyed samples are significantly enhanced by 3 orders of magnitude as compared with cp Cu. Among the laser-alloyed samples, the one with 70 wt.% Ti and average hardness of 661 HV0.2 possesses the highest electrical sliding wear resistance. The enhancement in electrical wear resistance in air is attributed to the presence of Cu-Ti intermetallic phases (IMPs) and solid solution hardening.
Original languageEnglish
Pages (from-to)58-73
Number of pages16
JournalSurface and Coatings Technology
Volume297
DOIs
Publication statusPublished - 15 Jul 2016

Keywords

  • Electrical sliding wear
  • Hardness
  • Intermetallic phases
  • Laser surface alloying

ASJC Scopus subject areas

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

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