In situ formation of titanium carbide using titanium and carbon-nanotube powders by laser cladding

M. M. Savalani, C. C. Ng, Q. H. Li, Hau Chung Man

Research output: Journal article publicationJournal articleAcademic researchpeer-review

97 Citations (Scopus)

Abstract

Titanium metal matrix composite coatings are considered to be important candidates for high wear resistance applications. In this study, TiC reinforced Ti matrix composite layers were fabricated by laser cladding with 5, 10, 15 and 20 wt% carbon-nanotube. The effects of the carbon-nanotube content on phase composition, microstructure, micro-hardness and dry sliding wear resistance of the coating were studied. Microstructural observation using scanning electron microscopy showed that the coatings consisted of a matrix of alpha-titanium phases and the reinforcement phase of titanium carbide in the form of fine dendrites, indicating that titanium carbide was synthesized by the in situ reaction during laser irradiation. Additionally, measurements on the micro-hardness and dry sliding wear resistance of the coatings indicated that the mechanical properties were affected by the amount of carbon-nanotube in the starting precursor materials and were enhanced by increasing the carbon-nanotube content. Results indicated that the composite layers exhibit high hardness and excellent wear resistance.
Original languageEnglish
Pages (from-to)3173-3177
Number of pages5
JournalApplied Surface Science
Volume258
Issue number7
DOIs
Publication statusPublished - 15 Jan 2012

Keywords

  • Hardness
  • Laser cladding
  • Microstructure
  • Titanium
  • Wear resistance

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

Cite this