Solidification evolution and corrosion performance of CoCrFeNiBx eutectic high entropy alloy coatings
文献类型：期刊论文
| 作者 | Zhang, Qi1; Si, Yueqi2,3; Han, Bin1; Li, Meiyan1; Wang, Qin1; Bian, Wenqi1; Xue, Xixin1 |
| 刊名 | SURFACE & COATINGS TECHNOLOGY
 |
| 出版日期 | 2024-05-15 |
| 卷号 | 483页码:17 |
| 关键词 | CoCrFeNiB x eutectic high entropy alloy coatings Solidification evolution Enthalpy change Microhardness Corrosion resistance |
| ISSN号 | 0257-8972 |
| DOI | 10.1016/j.surfcoat.2024.130760 |
| 通讯作者 | Han, Bin(hbzhjh@upc.edu.cn) |
| 英文摘要 | CoCrFeNiBx (x = 0.15, 0.30, 0.45, 0.60, 0.75) eutectic high entropy alloy (EHEA) coatings, abbreviated as B0.15-B0.75, were prepared by laser cladding. The inevitability of solid-state phase transition in B0.75 coating has been verified from the perspective of enthalpy. The solidification and crystallization process and laws of the CoCrFeNiBx coatings were obtained by observing the phase and microstructure, combining the DSC testing and analysis. When the mole ratio of B atoms x <= 0.45, the FCC1 phase solidifies into dendrites, and the eutectic structure composed of the coupling of FCC1 and FCC2 lamellae forms between dendrites. As the content of B increases, the proportion of eutectic structure rises steadily while the dendrites refine and decrease. When x = 0.60, the B content reaches the eutectic point, forming the eutectic structure with a feathery appearance. When x = 0.75, a strip-shaped boride structure will also precipitate after the formation of the metastable eutectic structure. The B element can promote the formation of eutectic structures, thereby improving the microhardness of the CoCrFeNiBx coatings from 267.0 HV0.2 to 555.4 HV0.2. However, as the B content rises, the corrosion current density of the CoCrFeNiBx coating in 3.5 % NaCl solution decreases from 1.08E-07 A/cm2 to 8.92E-06 A/cm2. The corrosion mechanism changes from pitting corrosion to intergranular corrosion. The high-phase interfacial energy of the eutectic structure exacerbates the galvanic corrosion of the coatings. |
| 资助项目 | National Natural Science Foundation of China[51801234] ; National Natural Science Foundation of China[51771228] ; Natural Science Foundation of Shandong Province, China[ZR2023ME176] ; Major Science and Technology Projects of Petro-China[ZD2019-184-004] ; Marine Science and Technology Collaborative Innovation Center Project[22-05-CXZX-04-04-29] |
| WOS研究方向 | Materials Science ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001298796400001 |
| 出版者 | ELSEVIER SCIENCE SA |
| 资助机构 | National Natural Science Foundation of China ; Natural Science Foundation of Shandong Province, China ; Major Science and Technology Projects of Petro-China ; Marine Science and Technology Collaborative Innovation Center Project |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Han, Bin |
| 作者单位 | 1.China Univ Petr East China, Sch Mat Sci & Engn, 66 Chang Jiang West Rd, Qingdao 266580, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Qi,Si, Yueqi,Han, Bin,et al. Solidification evolution and corrosion performance of CoCrFeNiBx eutectic high entropy alloy coatings[J]. SURFACE & COATINGS TECHNOLOGY,2024,483:17. |
| APA | Zhang, Qi.,Si, Yueqi.,Han, Bin.,Li, Meiyan.,Wang, Qin.,...&Xue, Xixin.(2024).Solidification evolution and corrosion performance of CoCrFeNiBx eutectic high entropy alloy coatings.SURFACE & COATINGS TECHNOLOGY,483,17. |
| MLA | Zhang, Qi,et al."Solidification evolution and corrosion performance of CoCrFeNiBx eutectic high entropy alloy coatings".SURFACE & COATINGS TECHNOLOGY 483(2024):17. |
入库方式： OAI收割
来源：金属研究所
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