研究目的
To fabricate a fully amorphous coating by laser cladding for effectively optimizing the surface properties of the substrate materials as well as studying the dependence of microhardness and corrosion resistance on microstructural evolution.
研究成果
(Zr0.53Al0.1Ni0.05Cu0.3Ti0.02)99Y1 coating with amorphous layer of about 180 lm thick on a steel substrate was successfully fabricated by laser cladding method. The amorphous coating exhibits high microhardness and good corrosion resistance, which are comparable to those of the as-cast Zr-based BMG.
研究不足
The study focuses on the fabrication and properties of a Zr-based amorphous coating by laser cladding, but does not explore the long-term durability or performance under varying environmental conditions.
1：Experimental Design and Method Selection:
Laser cladding method was used to prepare the amorphous coating.
2：Sample Selection and Data Sources:
Alloy ingots with a nominal composition of (Zr
3：53Al1Ni05Cu3Ti02)99Y1 were prepared by arc-melting the mixture of the pure elements. List of Experimental Equipment and Materials:
A 180-W neodymium-doped yttrium aluminum garnet (Nd:YAG) laser was used for cladding the coatings.
4：Experimental Procedures and Operational Workflow:
The coating was prepared by laser cladding and remelting, and the surface oxide film with about 20 lm in thickness was wear off.
5：Data Analysis Methods:
Microstructure at different depths of the coating was characterized by XRD and EPMA. Vickers microhardness along the depth direction of the coating was measured using a Vickers microhardness tester.
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