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Fe基非晶合金涂层的微结构与性能研究

Transactions of Beijing Institute of Technology(2008)

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Abstract
利用超音速火焰喷涂(HVOF)技术,在Cr18 Ni9 Ti不锈钢基体上成功制备了Fe基非晶合金涂层.并对涂层的微观组织结构、热稳定性和耐腐蚀性能等进行了研究.结果表明,涂层具有较高的非晶相含量,呈典型的层状分布,组织均匀致密;在非晶基体相中弥散分布有少量团簇状和枝晶状的α-Fe固溶体析出相,其晶粒尺寸约为50~500 nm;涂层具有较高的热稳定性,在879 K以下使用不会发生晶化过程;涂层在质量分数为3.5%NaCl水溶液中存在明显的钝化现象,有较宽的钝化区间和较高的过钝化电位,呈现出优异的抗氯离子点蚀能力.
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Key words
high velocity oxy-fuel,thermal stability,microstructure,Fe-based amorphous alloy,corrosion resistance
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