退火对锆合金表面Cr涂层孔隙率的影响

doi:10.13251/j.issn.0254-6051.2024.01.042

金属热处理 ›› 2024, Vol. 49 ›› Issue (1): 262-267.DOI: 10.13251/j.issn.0254-6051.2024.01.042

退火对锆合金表面Cr涂层孔隙率的影响

李志康¹, 王全伟¹, 申晓凤¹, 黄娇¹, 樊立峰², 马文¹, 张鹏省³

1. 内蒙古工业大学材料科学与工程学院内蒙古自治区薄膜与涂层重点实验室, 内蒙古呼和浩特 010051;
2. 内蒙古工业大学稀土金属材料工程研究中心, 内蒙古呼和浩特 010051;
3. 西北有色金属研究院, 陕西西安 710016

收稿日期:2023-08-18 修回日期:2023-11-28 发布日期:2024-02-29
通讯作者: 黄娇,副教授,博士,E-mail:hellohuangjiao@163.com
作者简介:李志康 (1996—),男,硕士研究生,主要研究方向为核电用锆合金耐腐蚀性能,E-mail: 1009012230@qq.com。
基金资助:
内蒙古自治区自然科学基金(2020BS05011);内蒙古工业大学校级自然科学基金(BS201905)

Effect of annealing on porosity of Cr coating on zirconium alloy surface

Li Zhikang¹, Wang Quanwei¹, Shen Xiaofeng¹, Huang Jiao¹, Fan Lifeng², Ma Wen¹, Zhang Pengxing³

1. Inner Mongolia Key Laboratory of Thin Film and Coatings, School of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot Inner Mongolia 010051, China;
2. Engineering Research Center of Rare Earth Metals, Inner Mongolia University of Technology, Hohhot Inner Mongolia 010051, China;
3. Northwest Institute for Nonferrous Metal Research, Xi'an Shaanxi 710016, China

Received:2023-08-18 Revised:2023-11-28 Published:2024-02-29

摘要/Abstract

摘要： 采用超音速火焰喷涂技术(High velocity oxygen fuel, HVOF)在Zr-4合金表面制备Cr涂层,在700 ℃退火2 h,在水蒸汽环境中进行1000 ℃高温氧化试验,采用豪斯天平密度测定组件测量涂层致密度,研究退火对Cr涂层孔隙率的影响。结果表明,退火可以明显提高Cr涂层致密度,弥补采用超音速火焰喷涂在试验参数下制备的涂层孔隙率高的问题,但其对涂层与基体界面无明显改变。退火处理后的Cr涂层抗氧化性能优于未退火样品,说明涂层制备后采用适当的热处理工艺可以达到改善涂层微观结构、提高涂层致密度以提升Cr涂层抗高温氧化性能的效果。

关键词: 锆合金, 铬涂层, HVOF, 退火, 致密度

Abstract: Cr coating was prepared on Zr-4 alloy by supersonic flame spraying (high velocity oxygen fuel, HVOF), annealed at 700 ℃ for 2 h, and oxidized at 1000 ℃ in water vapor environment, and the densities of the coating were measured by a Haus balance density measurement kit to investigate the effect of annealing on the porosity of Cr coatings. The results show that annealing can significantly improve the Cr coating density and compensate for the high porosity of the coating by HVOF with the experimental process parameters. There is no significant change in the interface between the coating and the substrate. The oxidation resistance of the annealed Cr coating is better than that of the unannealed specimen. It indicates that appropriate annealing after coating preparation can enhance the oxidation resistance at high temperature by increasing the coating densities and improving the coating microstructure.

Key words: zircaloy, Cr coating, HVOF, annealing, density

中图分类号:

TG174.4

李志康, 王全伟, 申晓凤, 黄娇, 樊立峰, 马文, 张鹏省. 退火对锆合金表面Cr涂层孔隙率的影响[J]. 金属热处理, 2024, 49(1): 262-267.

Li Zhikang, Wang Quanwei, Shen Xiaofeng, Huang Jiao, Fan Lifeng, Ma Wen, Zhang Pengxing. Effect of annealing on porosity of Cr coating on zirconium alloy surface[J]. Heat Treatment of Metals, 2024, 49(1): 262-267.

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退火对锆合金表面Cr涂层孔隙率的影响

Effect of annealing on porosity of Cr coating on zirconium alloy surface

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