Preparation and oxidation behaviour of MoSi2-SiC-Si-ZrB2 composite coatings on carbon surface via laser cladding

IF 1.3 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS

Advances in Applied Ceramics Pub Date : 2022-11-17 DOI:10.1080/17436753.2022.2155372

Xuemei Liu, Weixin Chen, X. Tao, Heliang Fan, Zhangsheng Liu, Y. Ling, Litong Guo

引用次数: 0

Abstract

ABSTRACT Anti-oxidation coatings of MoSi2-SiC-Si-ZrB2 were prepared on the graphite surface by laser cladding. The XRD, scratching bonding force, SEM and isothermal oxidation tests were used to investigate the microstructure and properties of the coatings. The coating with 40 wt% ZrB2 added (MoSi2:SiC:Si:ZrB2 = 16:4:5:16.6) has the lowest degree of oxidation, the best oxidation resistance and the highest bonding strength between coating and matrix. The scratching bonding force still maintained at about 9.9 N after laser ablation, and there were no obvious destructive defects but some pores and cracks on the coating. After a Si-enriched amorphous layer was formed, the relative oxygen permeability was significantly decreased and the oxidation of the coating was passivated, which prevented the matrix from further oxidation.

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碳表面激光熔覆MoSi2-SiC-Si-ZrB2复合涂层的制备及其氧化行为

采用激光熔覆的方法在石墨表面制备了MoSi2-SiC-Si-ZrB2抗氧化涂层。采用XRD、划痕结合力、SEM和等温氧化等测试手段对涂层的微观结构和性能进行了表征。ZrB2添加量为40 wt% (MoSi2:SiC:Si:ZrB2 = 16:4:5:16.6)的涂层氧化程度最低，抗氧化性能最好，涂层与基体的结合强度最高。激光烧蚀后涂层的划痕结合力仍保持在9.9 N左右，涂层表面没有明显的破坏性缺陷，但存在气孔和裂纹。富si非晶层形成后，相对氧渗透率显著降低，涂层氧化钝化，阻止基体进一步氧化。

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

Advances in Applied Ceramics 工程技术-材料科学：硅酸盐

CiteScore

4.40

自引率

4.50%

发文量

审稿时长

5.2 months

期刊介绍： Advances in Applied Ceramics: Structural, Functional and Bioceramics provides international coverage of high-quality research on functional ceramics, engineering ceramics and bioceramics.