J Mater Sci Technol ›› 2009, Vol. 25 ›› Issue (04): 492-498.

• Articles • Previous Articles     Next Articles

Microstructure of Cu-based Amorphous Composite Coatings on AZ91D Magnesium Alloy by Laser Cladding

Kaijin Huang1,2)†, Changsheng Xie2), T.M. Yue3)   

  1. 1) State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001, China
    2) State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China
    3) Department of Industrial and Systems Engineering, Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
  • Received:2008-05-13 Revised:2008-12-31 Online:2009-07-28 Published:2009-10-10
  • Contact: Kaijin Huang
  • Supported by:

    the Open Fund of the State Key Laboratory of Advanced Welding Production Technology in Harbin Institute of Technology, China
    the Open Fund of the State Key Laboratory of Materials Processing and Die & Mould Technology in Huazhong University of Science and Technology, China

Abstract:

To improve the sliding wear resistance of AZ91D magnesium alloy, Cu-based amorphous composite coatings made of Cu47Ti34Zr11Ni8 and Cu47Ti34Zr11Ni8+20 wt pct SiC powders were fabricated on AZ91D magnesium alloy by laser cladding, respectively. SEM (scanning electron microscopy), EDS (energy dispersive X-ray spectroscopy), XRD (X-ray diffraction) and TEM (transmission electron microscopy) techniques were employed to study the phases of the coatings. The results show that the coatings mainly consist of amorphous phase and different intermetallic compounds. The reason of formation of amorphous phase and the function of SiC particles were explained in details.

Key words: Laser cladding, Cu-based amorphous composite coating, SiC particle, AZ91D magnesium allo