1300-1500 ℃条件下 Yb4Hf3O12 涂层对 CMAS 侵蚀的稳健耐腐蚀性能

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2024-11-23 DOI:10.1016/j.jeurceramsoc.2024.117104

Yiming Wu , Xin Zhong , Du Hong , Xiaowu Chen , Minhao Shi , Liping Huang , Yaran Niu , Yi Zeng , Xuebin Zheng

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引用次数: 0

摘要

随着使用温度的不断变化，熔融钙镁铝硅酸盐（CMAS）沉积物的腐蚀已被认为是热/环境屏障涂层（T/EBCs）应用的主要障碍。本研究调查了等离子喷涂 Yb₄Hf₃O₁₂涂层在 1300、1400 和 1500 °C 下的 CMAS 腐蚀行为和机理，Yb₄Hf₃O₁₂涂层是 T/EBC 的理想候选材料。结果表明，Yb4Hf3O12 涂层能产生消耗大量 CMAS 成分的结晶产物，从而有效抵御 CMAS 的腐蚀。温度对涂层的腐蚀行为有显著影响。在较低温度下，由于反应速度较慢，涂层表面附近的腐蚀受到限制。随着温度的升高，CMAS 熔体的渗入量急剧增加。然而，在高温下，晶场从磷灰石向尖晶石的转变有效地抑制了进一步的渗透。结果还表明，Yb4Hf3O12 中较小的 RE3+ 半径可能是其具有优异耐腐蚀性的原因。

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Robust corrosion resistance of Yb4Hf3O12 coating against CMAS attack at 1300–1500 ℃

With the continuous evolution of service temperature, corrosion of molten calcium-magnesium-aluminum-silicate (CMAS) deposits has been identified as a major obstacle to the application of thermal/environmental barrier coatings (T/EBCs). This study investigated the CMAS corrosion behaviors and mechanisms of plasma-sprayed Yb₄Hf₃O₁₂ coatings, a promising candidate for T/EBCs, at 1300, 1400 and 1500 °C. Results showed that Yb₄Hf₃O₁₂ coating can effectively withstand CMAS corrosion by producing crystalline products that consumed a significant amount of CMAS components. Temperatures exerted significant influence on the corrosion behaviors of the coating. At lower temperatures, corrosion was limited near the coating surface because of the slower reaction rate. The infiltration of CMAS melts increased sharply with rise temperature. However, the transformation of crystalline field from apatite to cuspidine at elevated temperatures effectively suppressed the further penetration. The result also indicated that the smaller RE³⁺ radius in Yb₄Hf₃O₁₂ may contribute to the superior corrosion resistance.

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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.