Evolution features and corrosion behavior of (Yb0.2Y0.2Lu0.2Er0.2Sc0.2)2Si2O7 environmental barrier coatings under water vapor conditions at 1400 °C

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-04-01 DOI:10.1016/j.ceramint.2025.01.164

Tao Zhang , Zhiping Wang , Kunying Ding

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引用次数: 0

Abstract

Yb₂Si₂O₇ and (Yb_0.2Y_0.2Lu_0.2Er_0.2Sc_0.2)₂Si₂O₇ ((5RE_1/5)₂Si₂O₇) environmental barrier coatings were prepared via atmospheric plasma spraying. The corrosion behavior of these two coatings was investigated in a water vapor environment at 1400 °C for 200 h. The effects of high-entropy design and the selection of rare earth elements on improving the corrosion resistance were revealed. The results show that the (5RE_1/5)₂Si₂O₇ coating has better corrosion resistance than the Yb₂Si₂O₇ coating. The percentage of monosilicates in the (5RE_1/5)₂Si₂O₇ coating was even less (47.44 %) after 200 h of corrosion. Furthermore, the corrosion layer (8.19 μm) and thermally grown oxide (TGO) layer (5.85 μm) formed on the top coat of the (5RE_1/5)₂Si₂O₇ coating were thinner than those on the Yb₂Si₂O₇ coating (27.32 and 7.75 μm, respectively). The rational high-entropy design and the introduction of rare earth elements with high binding energy resulted in the enhanced corrosion resistance of the (5RE_1/5)₂Si₂O₇ coating and suppressed interfacial spalling caused by the rapid thickening of the TGO layer. This study provides an important reference for the design and application of environmental barrier coatings.

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（Yb0.2Y0.2Lu0.2Er0.2Sc0.2）2Si2O7环境屏障涂层在1400℃水蒸气条件下的演化特征及腐蚀行为

采用常压等离子喷涂法制备了Yb2Si2O7和（Yb0.2Y0.2Lu0.2Er0.2Sc0.2）2Si2O7 （(5RE1/5)2Si2O7）环境屏障涂层。研究了这两种涂层在1400℃水蒸气环境下200 h的腐蚀行为，揭示了高熵设计和稀土元素的选择对提高涂层耐腐蚀性的影响。结果表明，（5RE1/5）2Si2O7涂层比Yb2Si2O7涂层具有更好的耐蚀性。腐蚀200 h后，（5RE1/5）2Si2O7涂层中单硅酸盐的含量更低（47.44%）。此外，（5RE1/5）2Si2O7涂层上形成的腐蚀层（8.19 μm）和热生长氧化层（5.85 μm）比Yb2Si2O7涂层上形成的腐蚀层（27.32 μm）和热生长氧化层（7.75 μm）薄。合理的高熵设计和高结合能稀土元素的引入提高了（5RE1/5）2Si2O7涂层的耐蚀性，抑制了TGO层快速增厚引起的界面剥落。该研究为环境屏障涂料的设计和应用提供了重要参考。

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.