Morphology and structure of high temperature MoSi2 coating on niobium

Morphology and structure of high temperature MoSi2 coating on niobium
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发表时间：
2005
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通讯作者：
肖来荣;易丹青;殷磊;蔡志刚
肖来荣;易丹青;殷磊;蔡志刚
中科院分区：
其他
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作者：
肖来荣;易丹青;殷磊;蔡志刚

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采用浆料烧成法在Nb基体上制备了高温抗氧化MoSi2涂层，通过SEM、EDS和XRD研究了涂层的结构、成分和物相分布及其与涂层抗氧化性能的关系。结果表明，涂​​层与基体界面存在冶金结合，并通过扩散形成了过渡层。 多层结构提高了涂层的抗氧化能力。浆料烧成方法在Nb上制备高温MoSi2涂层是可行的。MoSi2自氧化在涂层表面形成SiO2氧化皮，阻止了氧的进一步扩散。
The high-temperature oxidation-resistant MoSi2 coating on the Nb substrate was prepared by slurry firing.The structure,compositions and phase distribution of the coating and the relationship between these features and the oxidation resistance of the coating were investigated by SEM,EDS and XRD.The results indicate that the interface between the coating and the substrate has metallurgic combination,and a transitional layer is formed by diffusion.The multi-layer structure improves the oxidation resistance of the coating.The method of slurry firing to prepare the high-temperature MoSi2 coating on Nb is feasible.The SiO2 scale,which is formed on the surface of the coating by the self-oxidation of MoSi2,prevents the further diffusion of oxygen.