Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/29210
Title: Laser forming of Zr-based coatings on AZ91D magnesium alloy substrates for wear and corrosion resistance improvement
Authors: Yue, TM 
Huang, KJ
Issue Date: 2011
Source: Materials transactions, 2011, v. 52, no. 4, p. 810-813
Abstract: To improve the wear and corrosion resistance of AZ91D magnesium alloy. Zr-based coatings were fabricated on the alloy substrate using laser forming. They were prepared from (i) Zr+Mg powders (5 : 1 mass%), and (ii) an undercoating of Zr+Mg powders (5 : 1 mass%) with a top layer of Zr powder. The Zr+Mg powder coating was found to consist primarily of Zr particles with some Zr-based intermetallic compounds in a Mg-Al matrix; while that with an extra top coating of Zr powder had an outer layer composed of Zr oxides and Zr aluminides. With regard to wear and corrosion resistance, the highest improvement was obtained for the specimen that was clad with a top layer of Zr powder. Compared to the AZ91D specimen without a laser formed coating, a fivefold decrease in weight loss and around three orders of magnitude decrease in corrosion current density respectively were obtained.
Keywords: Laser processing
Magnesium
Biomaterial
Zirconium coating
Wear
Corrosion
Publisher: Japan Institute of Metals
Journal: Materials transactions 
ISSN: 1345-9678
EISSN: 1347-5320
DOI: 10.2320/matertrans.M2010274
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