2;涂層"/> 2涂層是鋁電解槽理想的陰極材料。本文以石墨為基體,在KF-KCl-K2TiF6-KBF4熔鹽中以0.4-0.7A.cm-2電流密度、700-800℃溫度電沉積TiB2涂層,通過XRD衍射儀、SEM-EDS、表面粗糙度測量儀及附著力測試儀對不同電流密度和溫度下制備的涂層進行表征。結(jié)果表明：在石墨基體上可以得到均勻連貫的TiB2涂層；增大電流密度、降低電解溫度可以細(xì)化涂層晶粒,提高涂層致密性；在0.6 A.cm-2、750℃最優(yōu)電沉積條件下制得的TiB2涂層的厚度為229 μm,擇優(yōu)取向為<110>,表面粗糙度為14.85 μm,涂層與石墨基體的結(jié)合力為6.39 MPa。"/>

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TiB2涂層熔鹽電沉積制備與表征
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1.東北大學(xué)多金屬共生礦生態(tài)化冶金教育部重點實驗室;2.六盤水師范學(xué)院化學(xué)與材料工程學(xué)院;3.東北大學(xué)軋制技術(shù)及連軋自動化國家重點實驗室

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國家自然科學(xué)基金資助(項目號52074084)


Preparation and characterization of TiB2 coating by molten salt electrodeposition
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    摘要:

    炭陰極在鋁電解槽中受熔鹽和鋁液腐蝕而影響壽命,而TiB2涂層是鋁電解槽理想的陰極材料。本文以石墨為基體,在KF-KCl-K2TiF6-KBF4熔鹽中以0.4-0.7A.cm-2電流密度、700-800℃溫度電沉積TiB2涂層,通過XRD衍射儀、SEM-EDS、表面粗糙度測量儀及附著力測試儀對不同電流密度和溫度下制備的涂層進行表征。結(jié)果表明：在石墨基體上可以得到均勻連貫的TiB2涂層；增大電流密度、降低電解溫度可以細(xì)化涂層晶粒,提高涂層致密性；在0.6 A.cm-2、750℃最優(yōu)電沉積條件下制得的TiB2涂層的厚度為229 μm,擇優(yōu)取向為<110>,表面粗糙度為14.85 μm,涂層與石墨基體的結(jié)合力為6.39 MPa。

    Abstract:

    The lifespan of carbon cathode is affected by the corrosion of molten salt and molten aluminum in aluminum reduction cell, and TiB2 coating is an ideal cathode material for aluminum reduction cells.SIn this paper, TiB2 coatings were electrodeposited on graphite in KF-KCl-K2TiF6-KBF4molten salt at 700-800 oC with the current density of 0.4-0.7A.cm-2. The coatings prepared at different current densities and temperatures were analyzed by XRD, SEM-EDS, surface roughness tester and adhesion tester.SThe results show that the obtained TiB2 coating is uniform and coherent well to the graphite substrate. Increasing the current density and the electrolysis temperature can refine the grain size of the coating and improve the compactness of the coating. A TiB2 coating thickness of 229 μm, the preferred orientation of <110>, the surface roughness of 14.85 μm, and the adhesion between the coating and graphite substrate of 6.39 MPa is prepared by electrodeposition under the optimum condition of 0.6 A.cm-2 and 750 ℃.

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郭不拘,薛正鐸,張元坤,牛子儒,劉愛民,李松,雷以柱,石忠寧. TiB2涂層熔鹽電沉積制備與表征[J].稀有金屬材料與工程,2024,53(2):449~456.[Guo Buju, Xue Zhengduo, Zhang Yuankun, Niu Ziru, Liu Aimin, Li Song, Lei Yizhu, Shi Zhongning. Preparation and characterization of TiB2 coating by molten salt electrodeposition[J]. Rare Metal Materials and Engineering,2024,53(2):449~456.]
DOI：10.12442/j. issn.1002-185X.20230029

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  • 收稿日期:2023-01-16
  • 最后修改日期:2023-03-28
  • 錄用日期:2023-04-07
  • 在線發(fā)布日期: 2024-02-28
  • 出版日期: 2024-02-23