Journal
INTERMETALLICS
Volume 18, Issue 5, Pages 871-876Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.intermet.2009.12.020
Keywords
Nickel aluminides; based on Ni3Al; Tribological properties; Laser processing; Coatings intermetallic and orhterwise
Categories
Funding
- Program of 863 [2006AA03A219]
- The program of the light in China's western region
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Single Ni3Al intermetallic compound phase coating was successfully in-situ synthesized by laser cladding with preplaced Ni and Al mixed powders. The phase composition and microstructure of the Ni3Al coating were studied by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The effects of laser cladding parameters on the microstructure and tribological properties of the Ni3Al coating were investigated. It was found that the laser power density and energy density had a crucial influence on the microstructure and tribological properties of the Ni3Al coatings. The Ni3Al coating synthesized under the lower power density and energy density had a dense and fine microstructure as well as some excellent properties such as higher and homogeneous distribution microhardness, lower friction coefficient and wear rate. (C) 2009 Elsevier Ltd. All rights reserved.
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