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Formation and properties of a Zr-based amorphous coating by laser cladding
摘要： (Zr0.53Al0.1Ni0.05Cu0.3Ti0.02)99Y1 (at%) coating with amorphous layer of about 180 lm 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 surface 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 microstructural 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 comparable to those of the as-cast Zr-based BMG with the same composition, and higher than those of the steel substrate.
关键词： Laser cladding,Hardness,Corrosion resistance,Amorphous coating,Microstructure
更新于2025-09-10 09:29:36
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Preparation of Amorphous Coatings of AlFeCoNiCuZrV Alloy by Direct Current Magnetron Sputtering Method
摘要： The amorphous coatings of AlFeCoNiCuZrV high entropy alloy were deposited by direct current magnetron sputtering (DCMS) in the mixed atmosphere of Ar and O2. A smooth amorphous coating was obtained. The microstructure and properties of the coatings were investigated. The results showed that the chemical composition, microstructure and mechanical properties of the amorphous coatings intimately relied on the concentration of O2 in the mixture atmosphere. When O2 flow ratio increased, the thickness and roughness of the coatings decreased. The maximum values of the hardness and the elastic modulus of the coating are 12 and 168 Gpa, respectively.
关键词： Properties,Amorphous coating,Magnetron sputtering,High entropy alloy
更新于2025-09-09 09:28:46