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金屬鉬表面Mo-C-N-Si涂層的制備及其高溫氧化特性
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國家自然科學基金 (51071133)；福建省自然科學基金 (2010J01313)；福建省教育廳B類科技項目 (JB10145)


Preparation of Mo-C-N-Si Coating on Mo Substrate and Its Oxidation Property at High Temperature
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    摘要:

    在金屬鉬表面制備了Mo-C-N-Si涂層，研究了涂層在1600 ℃大氣環(huán)境下的氧化特性，采用SEM和XRD分析了涂層的微觀結(jié)構和物相組成。結(jié)果表明：Mo-C-N-Si涂層以MoSi2為主相，SiC和Si3N4為次相，存在Mo2C+MoxN中間層；由于擴散和氧化反應，涂層在氧化初期形成SiO2氧化膜層、MoSi2主體層、Mo5Si3層和Mo2C+MoxN層等四層結(jié)構，氧化后期轉(zhuǎn)變?yōu)镸o2C+MoxN層和Mo3Si+Mo5Si3層的雙層結(jié)構，導致涂層失效。由于C、N的引入，涂層抗熱震性能良好

    Abstract:

    Mo-C-N-Si coating on Mo substrates was prepared. The oxidation property of the coating at 1600 oC in air was investigated. Microstructures and phase composition of the coatings were analyzed by means of SEM and XRD, respectively. Results show that Mo-C-N-Si coating consists of the MoSi2, SiC and Si3N4 phases. The middle layer of Mo2C+MoxN can be observed in the coating. Mo-C-N-Si coating becomes four layer structures, i.e. SiO2 oxidation layer, MoSi2 body layer, Mo5Si3 layer and Mo2C+MoxN layer at the initial stage of oxidation duet to the diffusion and oxidation. However, Mo-C-N-Si coating fails in the later stage, probably because it changes to double-layer structures of Mo2C+MoxN layer and Mo3Si+ Mo5Si3 layer. In addition, the thermal shock resistance of the coating is improved by the addition of the C and N elements.

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古思勇,張厚安,吳藝輝,謝能平.金屬鉬表面Mo-C-N-Si涂層的制備及其高溫氧化特性[J].稀有金屬材料與工程,2014,43(5):1219~1223.[Gu Siyong, Zhang Houan, Wu Yihui, Xie Nengping. Preparation of Mo-C-N-Si Coating on Mo Substrate and Its Oxidation Property at High Temperature[J]. Rare Metal Materials and Engineering,2014,43(5):1219~1223.]
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  • 收稿日期:2013-05-27
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  • 在線發(fā)布日期: 2014-10-13
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