A method for preparing a Cu1.2(Mn,Ti,Nb)1.8O4 high temperature oxide conductive coating

CN118109814BActive Publication Date: 2026-08-28JIANGSU UNIV OF SCI & TECH +1
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Patent Information

Application Number
CN202410127955.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-01-30
Publication Date
2026-08-28
Estimated Expiration
2044-01-30

AI Technical Summary

Technical Problem

最初MnCr尖晶石也曾被考虑作为涂层材料，但是由于Cr的挥发会导致电池性能大减，因此把含有较多Cr元素的尖晶石从金属连接体涂层中排除

Benefits of technology

[0021]有益效果：相比于现有技术，本发明具有如下显著的优点：(1)实现了合金涂层中五种元素Mn、Cu、Co、Ti、Nb浓度的精确控制，控制Cu和Co元素浓度互为增减，Ti和Nb元素取代基体Mn的浓度，各元素浓度的设计控制促进了Cu1.2(Mn,Ti,Nb)1.8O4尖晶石涂层的生长，利于提高金属连接体的高温抗氧化性和高温电导率。(2)利用高能微弧沉积MnCuCoTiNb获得Cu1.2(Mn,Ti,Nb)1.8O4涂层，该方法制备的尖晶石复合涂层与不锈钢基体属于冶金结合+原位生长，解决此类复合涂层易剥落的问题。(3)制备的合金涂层为超细晶结构利于氧内扩散，Mn快速择优氧化，从而快速抑制铁素体不锈钢基体中Fe、Cr元素外扩散，进而提高燃料电池金属连接体的高温性能。(4)五种元素浓度的精确控制和超细晶结构能够促进Cu和Co快速氧化，进而缩短Cu、Co与Mn氧化物的充分接触，高温复合后生长出Ti和Nb掺杂的Cu1.2(Mn,Ti,Nb)1.8O4尖晶石氧化物涂层。

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Abstract

This invention discloses a Cu 1.2 (Mn,Ti,Nb) 1.8 The preparation method of O4 high-temperature oxide conductive coating is as follows: A MnCuCoTiNb quinary alloy is melted by vacuum arc melting, resulting in uniform distribution of alloying elements. An MnCuCoTiNb alloy electrode is then fabricated. A quinary alloy coating is deposited on a ferritic stainless steel substrate using high-energy micro-arc deposition. Finally, an oxide conductive coating connector is prepared in a high-temperature oxidizing environment. The coating is based on Cu... 1.2 (Mn,Ti,Nb) 1.8 O4-based spinel oxides. The spinel composite coating prepared by this method is a metallurgical bond and in-situ growth with the stainless steel substrate, which solves the problem of easy peeling of the composite coating; rapid and preferential oxidation of Mn, thereby quickly inhibiting the outward diffusion of Fe and Cr elements in the ferritic stainless steel substrate, thus improving the high-temperature performance of the fuel cell metal connector.
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