The applications of the ultrasonic phased array technique, the air-coupled ultrasonic technique and the laser ultrasonic technique for the non-destructive testing for advanced composite materials are reviewed. For the problems of the non-destructive testing for composite parts of aeronautical and astronautical sophisticated equipment in manufacture and service stages, such as the testing of the complex profile parts, the noncontact testing, the fast testing, the on-site testing, a series of self-developed novel ultrasonic testing systems are developed. The effective detection of the porosity and the delamination located at the corner of the Lshaped carbon fibre reinforced plastic (CFRP) composite parts is realized by using the ultrasonic phased array technique. The detection of the interface debonding in honeycomb sandwich composite parts is realized based on the air-coupled ultrasonic technique. The detection of the porosity, the impact-damage and the drilling-induced delamination in CFRP composite parts and the detection of the delamination in refractory composite parts are realized by using the laser ultrasonic technique. The key technical problems, the application scopes and the future development of these novel ultrasonic testing techniques are analysed. It is shown that the new ultrasonic testing techniques can be used for the complex profile detection, the noncontact detection, the fast detection and the on-site detection for composite parts.
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