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介绍了两种目前常用的材料薄层超声表征方法——纵波脉冲回波法和兰姆波法。阐述了这两种方法的基本原理,并结合具体实例分析了这两种方法的应用情况、优缺点和适用条件等。
Two commonly used methods of ultrasonic characterization of thin layers of materials are introduced - longitudinal wave pulse echo method and Lamb wave method. The basic principles of these two methods are expounded, and the application, advantages, disadvantages and applicable conditions of these two methods are analyzed with concrete examples.