非静态预氧化处理对 SiC-ZrC/SiC 多层涂层石墨循环烧蚀行为的影响

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

Ceramics International Pub Date : 2024-10-05 DOI:10.1016/j.ceramint.2024.10.037

Cheng Yang , Chen Zeng , Ping Xu , Weijie Song , Jinping Liu , Yu Zhang , Jie Xiong , Qichang Li , Zhean Su , Qizhong Huang

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引用次数: 0

摘要

作为石墨材料的涂层，SiC-ZrC 基陶瓷备受关注。然而，涂层与基体之间的热膨胀系数（CTE）不匹配严重限制了它们在恶劣环境中的应用。在此，我们提出了在 0.05 兆帕气压下进行非静态预氧化处理，将石墨基体的表面粗糙度提高到 18.054 μm，然后在预氧化石墨上制备 SiC-ZrC/SiC 多层涂层。结果表明，SiC-ZrC/SiC 多层涂层与石墨基体之间形成了牢固的互锁结构，有效提高了涂层的结合强度和抗循环烧蚀性能。负压预氧化石墨上的 SiC-ZrC/SiC 多层涂层的结合强度为 5.70 ± 0.42 MPa，比常压预氧化石墨上的结合强度（3.68 ± 0.08 MPa）高 54.89%。等离子体烧蚀 360 秒（60 秒×6）后，在负压下预氧化的 SiC-ZrC/SiC 多层涂层石墨的线性烧蚀率和质量烧蚀率分别为 -0.083 μm/s 和 0.101 mg/s。

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Effect of non-static pre-oxidation treatment on the cyclic ablation behavior of SiC-ZrC/SiC multilayer coated graphite

SiC-ZrC based ceramics have caught much attention as coatings for graphite materials. However, the coefficient of thermal expansion (CTE) mismatch between coatings and matrix severely limits their application in harsh environments. Herein, we proposed a non-static pre-oxidation treatment under an air pressure of 0.05 MPa to increase the surface roughness of graphite matrix to 18.054 μm and then prepared the SiC-ZrC/SiC multilayer coating on the pre-oxidized graphite. The results demonstrate that a firm interlocking structure was formed between SiC-ZrC/SiC multilayer coating and graphite matrix, which effectively improved the bonding strength and enhanced the cyclic ablation resistance of coatings. The bonding strength of SiC-ZrC/SiC multilayer coated on graphite pre-oxidized under negative pressure was 5.70 ± 0.42 MPa, which was 54.89 % higher than that on graphite pre-oxidized under atmospheric pressure (3.68 ± 0.08 MPa). After the plasma ablation for 360 s (60 s × 6), the linear and mass ablation rates of SiC-ZrC/SiC multilayer coated graphite which was pre-oxidized under negative pressure were −0.083 μm/s and 0.101 mg/s, respectively.

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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.