Enhancing the oxidation resistance of Nb superalloys at 1900 °C via in-situ formation of MoSi2/NbSi2/Nb5Si3 coatings

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-09-02 DOI:10.1016/j.jeurceramsoc.2025.117791

Man Wang , Chao Li , Cheng-Bin Zheng , Hui Dong , Guan-Jun Yang , Lin Chen

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Abstract

The widespread application of niobium (Nb) superalloys in space engines is hindered by their inadequate oxidation resistance. This study facilitates the use of Nb superalloys at temperatures reaching 1900 °C through in-situ formation of MoSi₂/NbSi₂/Nb₅Si₃ coatings. The coating was prepared using a two-step method, first involving Mo deposition by cathodic arc evaporation, followed by Si infiltration under vacuum conditions. High-temperature oxidation tests were conducted at temperatures up to 1900 °C, along with thermal shock tests ranging from 1600 °C to 800 °C, to assess the performance of this coating. The trilayer coatings demonstrated exceptional oxidation and thermal shock resistance at temperatures up to 1900 °C, providing full protection for Nb superalloys. This study offers valuable insights for the design of ultrahigh-temperature antioxidation coatings for Nb superalloys utilized in space engines.

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通过原位形成MoSi2/NbSi2/Nb5Si3涂层来增强铌高温合金在1900℃下的抗氧化性

铌高温合金的抗氧化性不足，阻碍了其在航天发动机上的广泛应用。本研究通过原位形成MoSi2/NbSi2/Nb5Si3涂层，促进了铌高温合金在1900℃温度下的使用。该涂层采用两步法制备，首先通过阴极电弧蒸发沉积Mo，然后在真空条件下渗透Si。在高达1900°C的温度下进行了高温氧化试验，并在1600°C至800°C的温度范围内进行了热冲击试验，以评估该涂层的性能。三层涂层在高达1900°C的温度下表现出优异的抗氧化性和抗热震性，为Nb高温合金提供全面保护。该研究为空间发动机用铌高温合金超高温抗氧化涂层的设计提供了有价值的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.