恒温氧化处理对YSZ∶Eu热障涂层发光性能及微观结构的影响

doi:10.13251/j.issn.0254-6051.2020.05.003

金属热处理 ›› 2020, Vol. 45 ›› Issue (5): 12-16.DOI: 10.13251/j.issn.0254-6051.2020.05.003

恒温氧化处理对YSZ∶Eu热障涂层发光性能及微观结构的影响

刘延宽, 杨丽萍, 王志平

中国民航大学天津市民用航空器适航与维修重点实验室, 天津 300300

收稿日期:2019-10-18 出版日期:2020-05-25 发布日期:2020-09-02
作者简介:延宽(1988—),男,博士,助理研究员,主要研究方向为涂层及无损检测技术、热塑性复合材料,E-mail: liuyankuan314@163.com
基金资助:
民航局科技项目(MHRD20130104);天津市自然科学基金(18JCQNJC05400);中央高校基本科研业务费项目中国民航大学专项(3122018D032)

Effect of isothermal oxidation on luminescent property and microstructure of YSZ∶Eu thermal barrier coating

Liu Yankuan, Yang Liping, Wang Zhiping

Tianjin Key Laboratory of Civil Aircraft Airworthiness and Maintenance, Civil Aviation University of China, Tianjin 300300, China

Received:2019-10-18 Online:2020-05-25 Published:2020-09-02

摘要/Abstract

摘要： 使用纯YSZ粉末与2mol%Eu³⁺掺杂的YSZ粉末制备3种不同结构的涂层。采用激光光谱仪分别对1100 ℃下热处理100、300、800 h的3种热障涂层试样进行发光性能测试,采用扫描电镜观察涂层的微观组织形貌,用能谱仪分析了涂层的元素分布。结果表明,YSZ:Eu涂层的荧光强度随热处理时间的延长逐渐下降,未经热处理的原始试样的荧光强度最大;YSZ∶Eu涂层的发射光谱图主要由502 nm与606 nm两个发射峰组成,其中606 nm的发射峰强度大于592 nm的发射峰;在相同热处理条件下,YSZ∶Eu涂层的荧光强度与涂层中Eu³⁺的含量成正比;3种涂层的孔隙率分别为8.41%、8.48%、8.37%;涂层的维氏硬度均处于430～440 HV0.3之间。2mol%Eu³⁺的掺杂对YSZ涂层的致密度与硬度未造成影响,1100 ℃下热处理800 h后Eu³⁺在涂层内部未发生扩散现象。

关键词: 热障涂层, Eu³⁺掺杂, 恒温氧化处理, 荧光强度, 微观形貌

Abstract: Three different types of coatings were deposited by pure YSZ powders and 2mol% Eu³⁺ doped powders. The luminescent properties of the coatings were tested by using a laser spectrometer after isothermal oxidation treatment at 1100 ℃ for 100, 300, 800 h respectively, the morphologies of the three different types of coatings were analyzed by scanning electron microscope (SEM), and the element analysis of the coatings was studied by energy dispersive spectrometer (EDS). The results show that the fluorescence intensities of the YSZ∶Eu coatings decrease with the increase of the isothermal oxidation treatment time, and the as-received specimen without heat treatment has the highest fluorescence intensity. The YSZ∶Eu emission spectrum mainly consists of two emission peaks at 502 nm and 606 nm, and the emission peak at 606 nm is stronger than that at 592 nm. Under the same heat treatment conditions, the fluorescence intensity of the YSZ∶Eu coating is proportional to the content of Eu³⁺. The porosity ratio of the three coatings is 8.41%, 8.48% and 8.37%, respectively. The Vickers hardness of the coatings is between 430 and 440 HV0.3, indicating that the doping of 2mol% of Eu³⁺ ions cannot cause any influence on the density and the hardness of the YSZ coatings. And the Eu³⁺ ions do not diffuse inside the coating even after isothermal oxidation treatment at 1100 ℃ for 800 h.

Key words: thermal barrier coating, Eu³⁺ doping, isothermal oxidation treatment, fluorescence intensity, micromorphology

中图分类号:

TG148

刘延宽, 杨丽萍, 王志平. 恒温氧化处理对YSZ∶Eu热障涂层发光性能及微观结构的影响[J]. 金属热处理, 2020, 45(5): 12-16.

Liu Yankuan, Yang Liping, Wang Zhiping. Effect of isothermal oxidation on luminescent property and microstructure of YSZ∶Eu thermal barrier coating[J]. Heat Treatment of Metals, 2020, 45(5): 12-16.

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恒温氧化处理对YSZ∶Eu热障涂层发光性能及微观结构的影响

Effect of isothermal oxidation on luminescent property and microstructure of YSZ∶Eu thermal barrier coating

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