Sputtered quaternary alloy coating of Fe4CoNiCu for solid oxide fuel cell steel interconnects application

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy Pub Date : 2024-11-17 DOI:10.1016/j.ijhydene.2024.11.199

Jiaxin Zhang, Shujiang Geng, Gang Chen, Fuhui Wang

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引用次数: 0

Abstract

A quaternary Fe₄CoNiCu alloy coating is applied on SUS 430 steel substrate for solid oxide fuel cell (SOFC) interconnects application via magnetron sputtering technology. The oxidation behavior of the coated steels is investigated in air at 800 °C. During initial oxidation, Fe and Co in the alloy coating is oxidized preferentially, forming Fe-rich oxide. Ni is oxidized to NiO by inward diffusion of oxygen. Slight Cu diffuses to or near the surface of the oxide scale to form CuO. Some Cu reacts with Fe₃O₄ to form CuFeO₂ inside the oxide scale. The alloy coating is thermally converted into a quaternary spinel coating of (Fe,Co,Ni,Cu)₃O₄ with a small quantity of CuO existing on the surface and a protective Cr₂O₃ layer is formed at the steel/coating interface. The (Fe,Co,Ni,Cu)₃O₄ spinel layer effectively inhibits the growth of Cr₂O₃ layer and the outward diffusion of Cr. The scale ASR is 13.08 mΩ cm² at 800 °C after 1680 h oxidation.

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用于固体氧化物燃料电池钢互连的 Fe4CoNiCu 溅射四元合金涂层

通过磁控溅射技术，在用于固体氧化物燃料电池（SOFC）互连器件的 SUS 430 钢基板上涂覆了四价 Fe4CoNiCu 合金涂层。研究了涂层钢在 800 °C 空气中的氧化行为。在初始氧化过程中，合金涂层中的铁和钴优先被氧化，形成富含铁的氧化物。镍通过氧气的内向扩散氧化成氧化镍。少量的 Cu 扩散到氧化鳞片表面或其附近，形成 CuO。部分铜与 Fe3O4 反应，在氧化鳞片内部形成 CuFeO2。合金涂层在热作用下转化为 (Fe,Co,Ni,Cu)3O4四元尖晶石涂层，表面存在少量的 CuO，并在钢/涂层界面形成保护性 Cr2O3 层。(Fe,Co,Ni,Cu)3O4尖晶石层有效地抑制了 Cr2O3 层的生长和铬的向外扩散。在 800 °C 下氧化 1680 小时后，鳞片 ASR 为 13.08 mΩ cm2。

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来源期刊

International Journal of Hydrogen Energy 工程技术-环境科学

CiteScore

13.50

自引率

25.00%

发文量

3502

审稿时长

60 days

期刊介绍： The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc. The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.