微弧氧化时间对锆合金表面<strong>MAO/Cr</strong>复合涂层结构与性能的影响

doi:10.11900/0412.1961.2022.00510

金属学报

2024, Vol. 60

Issue (5): 691-698 DOI: 10.11900/0412.1961.2022.00510

研究论文

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微弧氧化时间对锆合金表面MAO/Cr复合涂层结构与性能的影响

王郑¹, 王振玉¹, 汪爱英¹^,², 杨巍³, 柯培玲¹^,²(

)

1 中国科学院宁波材料技术与工程研究所中国科学院海洋新材料与应用技术重点实验室宁波 315201
2 中国科学院大学材料与光电研究中心北京 100049
3 西安工业大学材料与化工学院西安 710021

Influence of Micro-Arc Oxidation Time on Structure and Properties of MAO/Cr Composite Coatings

WANG Zheng¹, WANG Zhenyu¹, WANG Aiying¹^,², YANG Wei³, KE Peiling¹^,²(

)

1 Key Laboratory of Marine Materials and Related Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
2 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
3 School of Materials Science and Chemical Engineering, Xi'an Technological University, Xi'an 710021, China

引用本文:

王郑, 王振玉, 汪爱英, 杨巍, 柯培玲. 微弧氧化时间对锆合金表面MAO/Cr复合涂层结构与性能的影响[J]. 金属学报, 2024, 60(5): 691-698.
Zheng WANG, Zhenyu WANG, Aiying WANG, Wei YANG, Peiling KE. Influence of Micro-Arc Oxidation Time on Structure and Properties of MAO/Cr Composite Coatings[J]. Acta Metall Sin, 2024, 60(5): 691-698.

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摘要:

自福岛核事故发生以来，事故容错燃料包壳涂层受到了广泛关注。本工作通过微弧氧化(MAO)和高功率脉冲磁控溅射(HiPIMS) 2种技术在Zirlo锆合金基体上制备了MAO/Cr复合涂层，研究了微弧氧化时间对MAO/Cr复合涂层微观结构、力学性能以及抗高温水蒸气氧化性能的影响。结果表明：当微弧氧化时间由3 min增加到9 min时，复合涂层表面(200)织构系数由83%增加到100%；随着微弧氧化时间的增加，复合涂层的断裂韧性呈先增大后减小的趋势，在6 min时达到峰值4.64 MPa·m^1/2；经900℃水蒸气氧化1 h后，复合涂层体系均产生明显分层，其中MAO3min/Cr与MAO6min/Cr复合涂层增重幅度较小，而MAO9min/Cr复合涂层增重幅度较大，并在表截面形成大量微裂纹。当微弧氧化时间为6 min时，制备的复合涂层具有出色的力学性能和优异的抗高温水蒸气氧化性能。

关键词 ：微弧氧化, 高功率脉冲磁控溅射, 微观结构, 力学性能, 抗高温水蒸气氧化

Abstract：

Since the 2011 Fukushima nuclear accident, much attention has been given to accident-tolerant fuel cladding coating. In this study, micro-arc oxidation (MAO) and high-power pulsed magnetron sputtering were employed to deposit MAO/Cr composite coatings on the surface of Zirlo alloy. The effects of micro-arc oxidation time on the microstructure, mechanical properties, and high-temperature steam oxidation resistance of MAO/Cr composite coatings were investigated. Results showed that when the micro-arc oxidation time was enhanced from 3 min to 9 min, the (200)-plan texture coefficient increased from 83% to 100%. Moreover, with the increase in micro-arc oxidation time, the composite coating fracture toughness first increased, and then decreased after reaching a peak of 4.64 MPa⋅m^1/2 in 6 min. After steam oxidation at 900°C for 1 h, the composite coating systems showed delamination. Among them, MAO3min/Cr and MAO6min/Cr coatings gained less weight, whereas MAO9min/Cr coating gained more weight and formed a large number of microcracks on its surface cross-section. It can be observed that the obtained composite coating with a 6-min micro-arc oxidation has both excellent mechanical properties and outstanding resistance to high-temperature steam oxidation.

Key words： micro-arc oxidation high-power pulsed magnetron sputtering microstructure mechanical property high-temperature steam oxidation resistance

收稿日期: 2022-10-12

ZTFLH:

TG174.4

基金资助:中科院创新团队项目(292020000008)

通讯作者: 柯培玲，kepl@nimte.ac.cn，主要从事气相沉积技术的研究

Corresponding author: KE Peiling, professor, Tel: (0574)86694790, E-mail: kepl@nimte.ac.cn

作者简介: 王郑，男，1996年生，硕士生

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https://www.ams.org.cn/CN/10.11900/0412.1961.2022.00510 或 https://www.ams.org.cn/CN/Y2024/V60/I5/691

图1 微弧氧化沉积系统及高功率脉冲磁控溅射沉积系统示意图

表1 Cr涂层沉积参数

图2 3种复合涂层的XRD谱及织构系数图

图3 3种复合涂层的表/截面形貌的SEM像

图4 纯Cr涂层和复合涂层的硬度曲线和相应的压痕形貌

表2 3种复合涂层的断裂韧性 (MPa·m1/2)

图5 高温水蒸气腐蚀后3种复合涂层的氧化增重和物相组成及织构系数

图6 高温水蒸气腐蚀后3种复合涂层的表面形貌SEM像

表3 图6中各点成分EDS结果 (atomic fraction / %)

图7 高温水蒸气腐蚀后3种复合涂层的截面形貌SEM像及EDS线扫描分析

图8 HF酸溶液刻蚀后3种腐蚀态复合涂层的截面形貌

图9 MAO9min/Cr复合涂层在900℃水蒸气环境中的氧化过程示意图

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