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Indexed by:期刊论文

Date of Publication:2011-01-15

Journal:APPLIED SURFACE SCIENCE

Included Journals:SCIE、EI

Volume:257

Issue:7

Page Number:3097-3102

ISSN No.:0169-4332

Key Words:Intermetallics compounds coating; Arc spray processing; Post-heat treatment; Diffusion

Abstract:A Mg-Al intermetallic compounds coating was prepared on the surface of Mg-steel lap joint by arc-sprayed Al-Mg composite coating (Mg-cathode and Al-anode) and its post-heat treatment (PHT). The effect of PHT temperature on the phase transition, microstructure and mechanical properties of the coating was investigated by X-ray diffraction, scanning electron microscope, energy dispersive X-ray spectroscopy, optical microscope and microhardness test. The result shows that the intermetallic compounds layer that is mainly composed of Al(3)Mg(2) and Mg(17)Al(12) is formed by the self-diffusion reaction of Mg and Al splats in the coating after PHT for 4 h at 430 degrees C. (C) 2010 Elsevier B.V. All rights reserved.