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题名: Effect of YSZ-incorporated glass-based composite coating on oxidation behavior of K438G superalloy at 1000(circle)C
作者: Wang, Xin;  Zhu, Shenglong;  Gu, Ziwei;  Chen, Minghui;  Wang, Fuhui
发表日期: 2017-3-1
摘要: A glass-based composite coating incorporating YSZ particles was prepared by sintering on K438G superalloy substrates. The YSZ additions increased the cyclic oxidation resistance at 1000(circle)C, while the formation of zircon resulting from interfacial reactions between YSZ and the glass matrix worked reversely. Besides, the YSZ inclusions changed the crystallization behavior of the glass matrix, and only anorthite precipitated during cyclic oxidation. Due to the synergy of sand-blasting and sealing effect of the glass-based coating, the oxidation behavior of K438G was changed and a layer of alumina instead of chromia formed at the substrate/coating interface. Furthermore, a gahnite layer formed at the alumina/gahnite interface because of interfacial reactions between alumina and the glass matrix, leading to the formation of a bilayered thermally grown oxide. Thus, the alumina layer was protected from the attack of the active glass matrix. Accordingly, the coated K438G superalloy exhibited satisfactory oxidation resistance at 1000(circle)C. (C) 2016 Elsevier Ltd. All rights reserved.
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Recommended Citation:
Wang, Xin,Zhu, Shenglong,Gu, Ziwei,et al. Effect Of Ysz-incorporated Glass-based Composite Coating On Oxidation Behavior Of K438g Superalloy At 1000(circle)c[J]. Journal Of The European Ceramic Society,2017,37(3):1013-1022.

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