Title :
Nondestructive evaluation of materials with the scanning laser acoustic microscope
Abstract :
Nondestructive evaluation (NDE) of materials using scanning laser acoustic microscope (SLAM) is described. The operating principles of SLAM are explained. The applications of SLAM presented include industrial examples of nondestructive evaluation of structural ceramics, fiber-reinforced composite materials, electronic and electrical components and materials, and examples from biological research. It is concluded that SLAM provides a highly efficient method for materials inspection, but its utility is limited by absorption and/or scattering of the ultrasonic waves. The importance of selecting frequency and specimen thicknesses that minimize these effects is stressed.<>
Keywords :
acoustic microscopy; inspection; materials testing; measurement by laser beam; nondestructive testing; electrical components; fiber-reinforced composite materials; frequency selection; materials inspection; nondestructive evaluation; scanning laser acoustic microscope; specimen thicknesses; structural ceramics; Acoustic materials; Biological materials; Ceramics industry; Composite materials; Electronics industry; Fiber lasers; Industrial electronics; Microscopy; Optical materials; Simultaneous localization and mapping;
Journal_Title :
Electrical Insulation Magazine, IEEE
