Plasma Electrolytic Oxidation Ceramic Coatings on Zirconium (Zr) and ZrAlloys: Part I—Growth Mechanisms, Microstructure, and Chemical Composition

N. Attarzadeh, C. Ramana
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引用次数: 13

Abstract

Recently, a significant number of research projects have been directed towards designing and developing ceramic coatings for zirconium-based substrates due to their outstanding surface properties and utilization in modern technologies. The plasma electrolytic oxidation (PEO) coating is an environmentally friendly wet coating method that can be performed in a wide range of electrolytes. The surface characteristics of PEO coatings can be tailored by changing electrochemical parameters, electrolyte composition, and substrate alloying elements to adopt a conformal and adhesive PEO ceramic coating for the final demanding applications in chemical, electronics, and energy technologies. This review focuses on deriving a deeper fundamental understanding of the PEO growth mechanisms and the effect of process parameters on transient discharge behavior at breakdown, initiation, and growth of the oxide layer and incorporating species from the electrolyte. It highlights the fundamental microstructural properties associated with structural defects, phase transformation, and the role of additives.
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锆(Zr)和zr合金的等离子体电解氧化陶瓷涂层:第一部分-生长机制,微观结构和化学成分
近年来,由于锆基陶瓷涂层具有优异的表面性能和在现代技术中的应用,许多研究项目都针对锆基陶瓷涂层的设计和开发。等离子体电解氧化(PEO)涂层是一种环保的湿式涂层方法,可以在各种电解质中进行。PEO涂层的表面特性可以通过改变电化学参数、电解质成分和衬底合金元素来定制,以采用保形和粘合的PEO陶瓷涂层,以满足化学、电子和能源技术的最终要求。这篇综述的重点是对PEO生长机制和工艺参数对击穿、起始、氧化层生长和从电解质中吸收物质的瞬态放电行为的影响有更深入的基本理解。它强调了与结构缺陷,相变和添加剂的作用相关的基本显微组织特性。
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