热障涂层喷涂质量微焦点CT检测

敖波; 王婵; 邓翠贞; 邬冠华

热障涂层喷涂质量微焦点CT检测

1.
南昌航空大学测试与光电工程学院无损检测技术教育部重点实验室, 南昌 330063
2.
西安航空动力股份有限公司, 西安 710021

基金项目: 国家自然科学基金(61261031); 江西省测试技术与控制工程研究中心资助项目(ZX200928001)

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出版历程
- 收稿日期: 2012-08-04
- 刊出日期: 2013-08-28

Spraying quality inspection of thermal barrier coating by micro-computed tomography

1.
Key Laboratory of Nondestructive Testing (Ministry of Education), School of Measuring and Optical Engineering, Nanchang Hangkong University, Nanchang 330063, China
2.
Xi'an Aero-Engine Public Limited Company, Xi'an 710021, China

摘要

摘要: 采用微焦点X射线源对热障涂层样品进行了高分辨率X射线成像研究,采用多尺度对比度增强算法提高了热障涂层与基体之间的对比度.X射线图像显示热障涂层各处厚度差异较大,热障涂层内部可能存在大量孔隙.通过微焦点计算机层析成像(CT)对样品进行了高分辨率CT扫描与重建,得到了样品的CT重建图像.从热障涂层CT图像观察到热障涂层内部存在大量孔隙,且不同层孔隙尺寸、数量不同.结合3个坐标方向的切片图像分析了热障涂层深度方向的热障涂层厚度,得到了热障涂层厚度的二维分布,测量得到热障涂层平均厚度约为40μm.对沿热障涂层深度方向850~1131层切片图像,利用可视化软件VGstudio MAX得到了热障涂层内部孔隙三维分布.研究结果表明:微焦点CT可用于热障涂层制备工艺质量检测.
- 热障涂层 /
- 微焦点计算机层析成像(CT) /
- 厚度 /
- 致密性 /
- 可视化
Abstract: Specimen of thermal barrier coating (TBC) was inspected by high resolution X-ray imaging with a microfocus X-ray source,while multiscale contrast enhancement for X-ray image was performed,and the contrast between the coating and substrate was improved.X-ray images show that thickness of TBC is different in different positions,and many voids may exist in the interior of TBC.The specimen of TBC was scanned and reconstructed by high resolution microfocus X-ray computed tomography(CT),and slice images in different cross sections were obtained.CT images show that voids exist in TBC,and the size and quantity of voids are different in different cross sections.Combined with slice image analysis from three coordinate directions,thickness of TBC along deepth direction was analyzed,and two-dimensional distribution of TBC thickness was achieved.Average thickness of TBC is approximately 40 μm.The slice images from slice 850 to slice 1131 along deepth direction were visualized by the software of VGstudio MAX,and 3-D distribution of voids was displayed.Research results show that micro-computed tomography can be used to inspect the quality of thermal barrier coating.
- thermal barrier coating /
- micro-computed tomography /
- thickness /
- compactness /
- visualization

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参考文献(15)

[1]	文生琼,何爱杰,王皓.热障涂层在航空发动机涡轮叶片上的应用[J].燃气涡轮试验与研究,2009,22(1):59-62. WEN Shengqiong,HE Aijie,WANG Hao.Development of TBCs on turbine blade of aero-engine[J].Gas Turbine Experiment and Research,2009,22(1):59-62.(in Chinese)
[2]	范瑞芬.高温部件热障涂层的质量检测[J].理化检验:物理分册,2006,42(11):561-564. FAN Ruifen.Quality inspection on thermal barrier coatings of high temperature parts[J].Physical Testing and Chemical Analysis:Part A Physical Testing,2006,42(11):561-564.(in Chinese)
[3]	赵扬.热障涂层的超声表征原理与实验研究 [D].大连:大连理工大学,2008. ZHAO Yang.Principle and experimental investigation of ultrasonic characterization for thermal barrier coating [D].Dalian:Dalian University of Technology,2008.(in Chinese)
[4]	赵扬.超声体波声压反射系数谱表征表面涂层研究 [D].大连:大连理工大学,2010. ZHAO Yang.Ultrasonic characterization for surface coatings using pressure reflection coefficient spectrum of bulk wave [D].Dalian:Dalian University of Technology,2010.(in Chinese)
[5]	Bescond C,Kruger S E,Lévesque D,et al.In-situ simultaneous measurement of thickness,elastic moduli and density of thermal sprayed WC-Co coatings by laser-ultrasonics[J].Journal of Thermal Spray Technology,2007,16(2):238-244.
[6]	Sun J G.Development of nondestructive evaluation method for thermal barrier coatings [EB/OL]. [2012-5-23].Http:// www.netl.doe.gov/publications/proceedings/08/fem/manuscripts/Sun.pdf.
[7]	周俊华,徐可北,葛子亮.热障涂层厚度涡流检测技术研究[J].航空材料学报,2006,26(3):353-354. ZHOU Junhua,XU Kebei,GE Ziliang.Study on thickness of thermal barrier coatings with eddy-current testing technology[J].Journal of Aeronautical Materials,2006,26(3):353-354.(in Chinese)
[8]	Spanne P,Jones K W,Herman H,et al.Structure determination of thermal-spray materials using synchrotron X-ray microtomography[EB/OL]. [2012-5-23].Http://www. osti.gov/bridge/servlets/purl/6825861-Bkq5e7/6825861.pdf.
[9]	Spanne P,Jones K W,Herman H.Measurement of imperfections in thermal spray coatings using synchrotron-computed microtomography[J].Journal of Thermal Spray Technology,1993,2(2):121-124.
[10]	Ramesh S,Anand A K.Methodologies for non-destructive quantification of thermal barrier coating temperatures on service run parts:United States,7298818 [P].2007-04-05.
[11]	Sun J G.Development of nondestructive evaluation methods for ceramic coatings and membranes [EB/OL]. [2012-5-23].http://www.netl.doe.gov/publications/ proceedings/09/fem/manuscripts/Sun_Manuscript.pdf.
[12]	Maurel V,Helfen L,N'Guyen F,et al.Three-dimensional investigation of thermal barrier coatings by synchrotron-radiation computed laminography[J].Scripta Materialia,2012,66(7):471-474.
[13]	冯炎建,冯祖德,李思维,等.C/SiC表面SiC涂层氧化的显微CT无损检测与分析[J].复合材料学报,2011,28(5):126-132. FENG Yanjian,FENG Zude,LI Siwei,et al.Nondestructive testing and analysis of SiC coating on surface of C/SiC composites after oxidation with micro CT[J].Acta Materiae Compositae Sinica,2011,28(5):126-132.(in Chinese)
[14]	Stuart R S.Microcomputed tomography methodology and applications[M].Boca Raton,US:CRC Press,2009.
[15]	Vuylsteke P P,Schoeters E P.Method and apparatus for contrast enhancement:United States,5805721 [P].1998-09-18.