首页|Formation and properties of a Zr-based amorphous coating by laser cladding
Formation and properties of a Zr-based amorphous coating by laser cladding
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(Zr0.53Al0.1Ni0.05Cu0.3Ti0.02)99Y1(at％)coating with amorphous layer of about 180 μm thick was prepared on a steel substrate by using laser cladding method.The coating is compact and shows good metallurgical bonding with substrate.The microstructure,microhardness and corrosion behavior along the depth from the coating sur-face to the substrate were investigated.It is found that a gradient structure consisted of amorphous surface layer,amorphous-crystalline transitional layer and substrate is formed after the laser cladding.The microhardness and corrosion behavior exhibit variation with the microstruc-tural evolution at different depths from the coating surface.The microhardness and corrosion resistance in 3.5 wt％NaCl solution of the amorphous surface layer are compa-rable to those of the as-cast Zr-based BMG with the same composition,and higher than those of the steel substrate.
Key Laboratory of Aerospace Materials and Performance(Ministry of Education),School of Materials Science and Engineering,Beihang University,Beijing 100191,China
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