Formation and Properties of Ni-Based Amorphous Metallic Coating Produced by HVAF Thermal Spraying
Formation and Properties of Ni-Based Amorphous Metallic Coating Produced by HVAF Thermal Spraying
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DOI：
10.2320/matertrans.46.1010
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发表时间：
2005-05
影响因子：
1.2
通讯作者：
Aiqin Wang;Zhang Tao;Jian Wang
中科院分区：
文献类型：
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作者：
Aiqin Wang;Zhang Tao;Jian Wang
采用高速空气燃料热喷涂技术制备了厚度约500µm的Ni59Zr20Ti16Si2Sn3部分非晶态金属涂层。将气体雾化法制备的非晶态合金粉末用于超音速火焰喷涂，制备了非晶态金属涂层。显微组织研究表明，在热喷涂过程中发生了结晶和氧化。用差示扫描量热法测定涂层中非晶相的体积分数为44%。还研究了所得涂层的磨损和腐蚀性能。涂层的腐蚀特性对所选的水溶液很敏感。在0.05kmol/m(3)H_2SO_4+0.05kmol/m(3)Na_2SO_4水溶液中，由于钝化电流密度低，钝化区宽，表现出良好的耐蚀性。
A highly dense Ni59Zr20Ti16Si2Sn3 partial amorphous metallic coating, about 500 mu m thick, was fabricated by means of HVAF (High Velocity Air Fuel) thermal spraying. Amorphous alloy powders produced by using gas atomization were used for HVAF thermal spraying to produce an amorphous metallic coating. Microstructural investigation showed that crystallization and oxidation occurred during thermal spraying. The volume fraction of amorphous phase in the coating is 44% as determined by using differential scanning calorimetry. Studies of the wear and corrosion properties of the resulting coating were also performed. The corrosion characteristics of the coating are sensitive to aqueous solutions selected. It exhibits good corrosion resistance in 0.05 kmol/m(3) H2SO4 + 0.05 kmol/m(3) Na2SO4 aqueous solution due to low passive current density and wide passive region.