Morphology distribution and corrosion resistance of in-situ TiC/CoCrFeNi high-entropy alloy coating

IF 4.8 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization Pub Date : 2025-04-23 DOI:10.1016/j.matchar.2025.115078

Zhong-Tang Gao , Rui-Qi Wang , Ling-Chen Ke , Ya Liu , Zhi-Ming Gao , Chuan-Wei Zhang , Yuan Yu

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引用次数: 0

Abstract

CoCrFeNiTi_xC_x (x = 0.1,0.2,0.3) coatings were prepared on the surface of Q235 steel by laser cladding. The effects of in-situ synthesized TiC content on the microstructure and properties of the coating were studied by scanning electron microscopy, electron backscatter diffraction, transmission electron microscope and electrochemical corrosion. The results show that in-situ TiC mainly exists in the form of small particles in the matrix, and with the increase of Ti and C content, the distribution of in-situ TiC in the crystal becomes uniform and dispersed. The in-situ precipitated TiC in the coating has an obvious phase relationship with the matrix, TiC[

\bar{1}

00]∥matrix phase [

\bar{2} \bar{1}

0], TiC(00

\bar{2}

)∥matrix phase (1

\bar{2}

0). The electrochemical corrosion performance of CoCrFeNiTi_0.2C_0.2 in 3.5 wt% NaCl solution is good, and the corrosion form mainly exists in the form of grain boundary corrosion and pitting corrosion.

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原位TiC/CoCrFeNi高熵合金涂层的形貌分布及耐蚀性

通过激光熔覆法在 Q235 钢表面制备了 CoCrFeNiTixCx（x = 0.1、0.2、0.3）涂层。通过扫描电子显微镜、电子反向散射衍射、透射电子显微镜和电化学腐蚀等方法研究了原位合成 TiC 含量对涂层微观结构和性能的影响。结果表明，原位 TiC 主要以小颗粒的形式存在于基体中，随着 Ti 和 C 含量的增加，原位 TiC 在晶体中的分布变得均匀且分散。涂层中原位析出的TiC与基体有明显的相关系，TiC[1¯00]∥基体相[2¯1¯0]，TiC(002¯)∥基体相（12¯0）。CoCrFeNiTi0.2C0.2 在 3.5 wt% NaCl 溶液中的电化学腐蚀性能良好，腐蚀形式主要以晶界腐蚀和点腐蚀形式存在。

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来源期刊

Materials Characterization 工程技术-材料科学：表征与测试

CiteScore

7.60

自引率

8.50%

发文量

746

审稿时长

36 days

期刊介绍： Materials Characterization features original articles and state-of-the-art reviews on theoretical and practical aspects of the structure and behaviour of materials. The Journal focuses on all characterization techniques, including all forms of microscopy (light, electron, acoustic, etc.,) and analysis (especially microanalysis and surface analytical techniques). Developments in both this wide range of techniques and their application to the quantification of the microstructure of materials are essential facets of the Journal. The Journal provides the Materials Scientist/Engineer with up-to-date information on many types of materials with an underlying theme of explaining the behavior of materials using novel approaches. Materials covered by the journal include: Metals & Alloys Ceramics Nanomaterials Biomedical materials Optical materials Composites Natural Materials.