SrAl2O4∶Eu,Ho/树脂应力发光薄膜在焊缝缺陷检测中的应用  

Application of SrAl_2O_4:Eu,Ho/Resin Mechanoluminescence Thin Film in Visualization Detection of Weld Seam Defects

作　　者：郑升辉 刘亚楠 李月婵 付晓燕 张洪武[2] ZHENG Sheng-hui;LIU Ya-nan;LI Yue-chan;FU Xiao-yan;ZHANG Hong-wu(School of Materials Science and Engineering,Xiamen University of Technology,Key Laboratory of Functional Materials and Applications of Fujian Province,Xiamen 361024,China;Institute of Urban Environment,Chinese Academy of Sciences,Xiamen 361021,China)

机构地区：[1]厦门理工学院材料科学与工程学院,福建省功能材料及应用重点实验室,福建厦门361024 [2]中国科学院城市环境研究所,福建厦门361021

出　　处：《发光学报》2018年第9期1225-1232,共8页Chinese Journal of Luminescence

基　　金：福建省科技厅国际合作重点项目(2018I0018);2017年度福建省高校新世纪优秀人才项目;国家自然科学基金(51102201)资助项目

摘　　要：采用高温固相法合成SrAl_2O_4:Eu,Ho应力发光材料。XRD结果表明,所合成的样品较纯,掺杂离子并未改变基质材料的基体结构。将SrAl_2O_4:Eu,Ho(SAOEH)应力发光粉末与树脂混合制备复合应力发光薄膜。光谱结果表明,薄膜的发光随着厚度的增加而增强;薄膜的SEM结果表明,SAOEH粉体颗粒均匀分散在树脂中。将应力发光薄膜应用于钢板焊缝处背面,应力测试结果表明薄膜应力发光先增强后减弱。当薄膜厚度为0.9 mm时,应力发光最强,且在焊缝处可得到较高的响应值。此外,在循环测试的过程中,应力发光薄膜可对焊板断裂实现实时响应,结合CCD相机可实现钢板焊缝检测的可视化,并对缺陷定位。Mechanoluminescence(ML)materials SrAl 2O 4∶Eu,Ho(SAOEH)were prepared via solid state reaction.The XRD results show that the as-prepared sample is mostly monoclinic SrAl 2O 4 phase.The SAOEH powder was mixed with high elastic resin to prepare ML thin film.The photoluminescent intensity of the ML film increases following the increase of film thickness.The SEM results reveal that SAOEH ML particles disperse uniformly in the resin.In order to detect the weld seam defects,the SAOEH ML film was pasted in the backside of welding steel plate.It can be found that the ML intensity in the weld region is stronger than that in any other region.In addition,the ML intensity is enhanced following the increase of film thickness and reaches the strongest when the film thickness is 0.9 mm.Furthermore,the SAOEH film can be utilized to realize a real-time response to the fracture.Combining with CCD camera,the visual detection of steel weld and location of the defect region during the cyclic test can be realized.

关 键 词：SrAl2O4∶Eu Ho/树脂薄膜 应力发光 缺陷监测 荧光传感 

分 类 号：O482.31[理学—固体物理]