Progress in terahertz nondestructive testing: A review
作者机构：Laboratory of Optics Terahertz and Non-Destructive Testing School of Mechanical Engineering and Automation Fuzhou University Fuzhou 350116 China School of Mechatronic Engineering and Automation Shanghai University Shanghai 200072 China
出 版 物：《Frontiers of Mechanical Engineering》 (机械工程前沿（英文版）)
年 卷 期：2019年第14卷第3期
页 面：273-281页
核心收录：
基 金：National Natural Science Foundation of China (Grant No. 51675103) Fujian Provincial Excellent Young Scientist Fund (Grant No. 2014J07007) Shanghai Natural Science Fund (Grant No. 18ZR1414200) Research Project of State Key Laboratory of Mechanical System and Vibration (Grant No. MSV201807)
主 题：terahertz pulsed imaging (TPI) nondestructive testing (NDT) composite material thermal barrier coating
摘 要：Terahertz (THz) waves, whose frequencies range between microwave and infrared, are part of the electromagnetic spectrum. A gap exists in THz literature because investigating THz waves is difficult due to the weak characteristics of the waves and the lack of suitable THz sources and detectors. Recently, THz nondestructive testing (NDT) technology has become an interesting topic. This review outlines several typical THz devices and systems and engineering applications of THz NDT techniques in composite materials, thermal barrier coatings, car paint films, marine protective coatings, and pharmaceutical tablet coatings. THz imaging has higher resolution but lower penetration than ultrasound imaging. This review presents the significance and advantages provided by the emerging THz NDT technique.
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