Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/18800
Title: In situ formation of titanium carbide using titanium and carbon-nanotube powders by laser cladding
Authors: Savalani, MM 
Ng, CC
Li, QH
Man, HC 
Keywords: Hardness
Laser cladding
Microstructure
Titanium
Wear resistance
Issue Date: 2012
Publisher: North-Holland
Source: Applied surface science, 2012, v. 258, no. 7, p. 3173-3177 How to cite?
Journal: Applied surface science 
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.
URI: http://hdl.handle.net/10397/18800
ISSN: 0169-4332
EISSN: 1873-5584
DOI: 10.1016/j.apsusc.2011.11.058
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