Nondestructive testing using terahertz waves

被引：0

作者：

Fukuchi, Tetsuo ^{[1
]}

Fuse, Norikazu ^{[1
]}

Mizuno, Maya ^{[2
]}

Fukunaga, Kaori ^{[2
]}

机构：

[1] Central Research Institute of Electric Power Industry, 2-6-1, Nagasaka, Yokosuka

[2] National Institute of Information and Communications Technology, 4-2-1, Nukui-Kitamachi, Koganei

来源：

IEEJ Transactions on Power and Energy | 2015年 / 135卷 / 11期

关键词：

Corrosion detection; Spatial resolution; Terahertz waves; Thermal barrier coating; Thickness measurement;

D O I：

10.1541/ieejpes.135.647

中图分类号：

学科分类号：

摘要：

Terahertz (THz) waves are electromagnetic waves in the frequency region 100 GHz-10 THz, and are useful fo nondestructive testing of dielectric materials, such as polymers, plastics, and ceramics. In this report, application o THz waves to inspection of thermal barrier coating (TBC), corrosion evaluation and detection of rust under paint, an improvement of spatial resolution in THz imaging is presented. TBC is applied to high temperature components i gas turbines, and consists of a ceramic topcoat and a metallic bondcoat. THz waves were shown to be effective fo measuring the topcoat thickness, which is an important factor which determines the thermal resistivity. Early stage of corrosion of metal substrates covered with paint are difficult to detect by visual inspection, but could be visualize using THz waves. In imaging using THz waves, the spatial resolution is mainly limited by the effective spot size Frequency filtering of THz waves and combination with image processing techniques were found to be effective fo improving the spatial resolution. This was demonstrated in THz imaging of an IC card. © 2015 The Institute of Electrical Engineers of Japan.

引用

页码：647 / 650

页数：3

共 11 条

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[4]

Fukuchi T., Fuse N., Fujii T., Okada M., Mizuno M., Fukunaga K., Measurement of topcoat thickness of thermal barrier coating for gas turbines using terahertz waves, Electr. Eng. Jpn, 183, 4, pp. 1-9, (2013)

[5]

Fukuchi T., Fuse N., Okada M., Fujii T., Mizuno M., Fukunaga K., Measurement of refractive index and thickness of toptocat of thermal barrier coating by reflection measurement of terahertz waves, Electr. & Commun. Jpn, 96, 12, pp. 37-45, (2013)

[6]

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[7]

Fukuchi T., Fuse N., Okada M., Ozeki T., Fujii T., Mizuno M., Fukunaga K., Topcoat thickness measurement of thermal barrier coating of gas turbine blade using terahertz wave, Electr. Eng. Jpn, 189, 1, pp. 1-8, (2014)

[8]

Fuse N., Fukuchi T., Takahashi T., Mizuno M., Fukunaga K., Evaluation of applicability of noncontact analysis methods to detect rust regions in coated steel plates, IEEE T. THz. Sci. Tech., 2, 2, pp. 242-249, (2012)

[9]

Fuse N., Fukuchi T., Mizuno M., Fukunaga K., High-speed underfilm corrosion imaging using a terahertz camera, IEEJ Trans, 135, 4, pp. 241-246, (2015)

[10]

Fukuchi T., Fuse N., Mizuno M., Fukunaga K., Improvement of inplane spatial resolution in terahertz wave cross-section imaging, IEEJ Trans, 134, 8, pp. 1039-1048, (2014)

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