金属硅化物抗氧化涂层的研究进展

2021-05-10 15:43:24 作者：安亮来源：中国腐蚀与防护学报分享至：

摘要

针对化工领域，阐述了Si-Fe涂层的制备工艺现状，并对其抗氧化机制及工业化应用发展进行了说明；对于高温防护领域，重点综述了Si-Mo、Si-Zr两种高温防护涂层的研究现状，并介绍了不同元素对涂层抗氧化性能的合金化改善效果及其抗氧化机制。相对于单层涂层，双层或多层复合硅化物涂层具有极佳的可设计性，并能够兼顾耐热性能与结合强度的要求，避免涂层与基体间热膨胀失配、元素扩散等缺陷的产生，举例说明了其设计理念及性能优势。展望了难熔金属硅化物涂层的发展方向，为其工程应用提供理论支持。

关键词：硅化物 ; 抗氧化性能 ; 合金化 ; 复合涂层

Abstract

For chemical industry, the preparation technologies, the anti-oxidation mechanisms and the status of industrial applications of Si-Fe coatings are introduced. The research status of Si-Mo and Si-Zr coatings for the application of high temperature protection are overviewed particularly, simultaneously，the effect of various alloying elements on the anti-oxidation of silicide coatings and the relevant mechanisms are described. Compared to single-layer silicide coatings, bilayer or multi-layer composite coatings with excellent designability can meet simultaneously the requirements both of heat resistance of coatings and the adhesive strength between coatings and substrates, besides, which also can minimize defects such as the thermal expansion mismatch and elemental inter-diffusion between the coating and the substrate. Therefore, of which the performance advantages and structural design concept are illustrated. Lastly, the development trend of refractory metal silicide coatings is prospected so that to provide the proper reference for engineering application.

Keywords： metal silicide ; anti-oxidation property ; alloying ; composite coating