无机材料学报2026，Vol.41Issue(8)：1095-1102,8.DOI:10.15541/jim20250406
氮气调控微弧氧化:锆合金涂层的致密化与耐蚀性
Nitrogen Modulation of Micro-arc Oxidation:Densification and Corrosion Resistance of Zirconium Alloy Coatings
摘要
Abstract
Zirconium alloys used in nuclear reactors undergo severe zirconium-water reaction during loss-of-coolant accidents.Conventional micro-arc oxidation(MAO)coatings,limited by their high porosity,offer insufficient protection.In this study,nitrogen was innovatively introduced into the MAO process to suppress arc concentration,thereby achieving simultaneous structural optimization and nitrogen doping of the coating.Experimental results demonstrate the successful fabrication of a dense zirconium oxide coating through this approach.The porosity is significantly reduced to 4.96%(representing a 62%reduction),surface roughness is decreased,and a tight,crack-free bond with the substrate is achieved.Simultaneously,nitrogen is incorporated into the crystal lattice,forming a characteristic Zr-O-N bonding structure.Benefiting from this synergistic optimization of the microstructure and chemical composition,the dense coating exhibits a corrosion current density as low as 1.61×10-8 A·cm-2 in a 0.1 mol/L LiOH solution,which is one order of magnitude lower than that of a conventional MAO coating.This work confirms that a nitrogen atmosphere can simultaneously facilitate structural regulation and chemical modification,providing a new pathway for developing high-performance accident-tolerant zirconium alloy cladding coatings.关键词
锆合金/微弧氧化/氮掺杂/耐腐蚀性能Key words
zirconium alloy/micro-arc oxidation/nitrogen doping/corrosion resistance分类
矿业与冶金引用本文复制引用
纪若男,魏大庆,王庆宇,李永昶,张田,杜青..氮气调控微弧氧化:锆合金涂层的致密化与耐蚀性[J].无机材料学报,2026,41(8):1095-1102,8.基金项目
基本科研业务费(2522050205A0015) Fundamental Research Funds for the Academy of Sciences(2522050205A0015) （2522050205A0015）
