用气体雾化法制备了Ni53Nb20Ti10Zr8Co6Cu3非晶合金粉末, 将粒度小于25 μm的非晶粉末用动力金属喷涂工艺制备了非晶涂层.研究表明, 非晶涂层厚度约500 μm, 涂层的空隙率随喷涂温度和沉积率的增加而减少. 涂层腐蚀性能的评价选用1 kmol/m3 HCl水溶液, 动电位极化曲线测量表明, 随着空隙率的减少,涂层呈现出与非晶合金相当的优良耐蚀性能.
Gas-atomized Ni53Nb20Ti10Zr8Co6Cu3 (at.%) amorphous powders with particles sizes of below 25 μm were used for kinetic metallization (KM) to deposit coatings with thickness of ~500 μm. It was indicated that fully amorphous metallic coatings were successfully obtained. The porosities of the deposited coatings decreased with increasing spray temperature and deposition efficiency. The corrosion property of the coatings was evaluated by potentiodynamic polarization in 1 kmol/m3 HCl aqueous solution. The coating keeps the same good corrosion resistance as its amorphous alloy at a lower porosity.
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