MA956 ODS合金微晶涂层对1Cr18Ni9Ti不锈钢氧化性能的改善
Improvement in the Oxidation Resistance of 1Cr18Ni9Ti by a Micro-crystalline MA956 ODS Alloy Coating
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摘要: 采用高频电脉冲沉积技术在1Cr18Ni9Ti不锈钢表面上沉积了厚度约为50μm的MA956 ODS合金纳米微晶涂层、涂层与基体之间呈现良好的冶金结合.在1000℃静态空气中对1Cr18Ni9Ti试样与表面施加涂层试样进行了总计100h的恒温氧化实验.用AFM,SEM,EDX和XRD分别对涂层和氧化后试样的形貌。成分和组成进行了观察和分析.结果显示:1Cr18Ni9Ti表面沉积MA956ODS。合金纳米微晶涂层促进了Cr的选择氧化,提高了1Cr18Ni9Ti表面氧化膜的粘附性,改善了1Cr18Ni9Ti抗高温氧化性能.Abstract: A micro-crystalline MA956 ODS alloy coating of about 50mm thick was developed on the 1Cr18Ni9Ti stainless steel by means of a high-frequency electro-spark deposition technique. The coating has a very fine grain size of about 100 nm and excellent metallurgical bonding with the substrate. Isothermal oxidation in air at 1000℃ for 100 h shows that the micro-crystalline MA956 ODS alloy coating on 1Cr18Ni9Ti promoted the selective oxidation of Cr and also improved the scale spallation resistance dramatically, thus increased the oxidation resistance of 1Cr18Ni9Ti greatly.
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