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金屬硅化物抗氧化涂層的研究進(jìn)展

2021-05-10 15:43:24 作者：安亮來源：中國腐蝕與防護(hù)學(xué)報(bào) 分享至：

摘要

針對化工領(lǐng)域，闡述了Si-Fe涂層的制備工藝現(xiàn)狀，并對其抗氧化機(jī)制及工業(yè)化應(yīng)用發(fā)展進(jìn)行了說明；對于高溫防護(hù)領(lǐng)域，重點(diǎn)綜述了Si-Mo、Si-Zr兩種高溫防護(hù)涂層的研究現(xiàn)狀，并介紹了不同元素對涂層抗氧化性能的合金化改善效果及其抗氧化機(jī)制。相對于單層涂層，雙層或多層復(fù)合硅化物涂層具有極佳的可設(shè)計(jì)性，并能夠兼顧耐熱性能與結(jié)合強(qiáng)度的要求，避免涂層與基體間熱膨脹失配、元素?cái)U(kuò)散等缺陷的產(chǎn)生，舉例說明了其設(shè)計(jì)理念及性能優(yōu)勢。展望了難熔金屬硅化物涂層的發(fā)展方向，為其工程應(yīng)用提供理論支持。

關(guān)鍵詞：硅化物 ; 抗氧化性能 ; 合金化 ; 復(fù)合涂層

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