A nonlinear resonant ultrasonic method using water immersion has been developed to detect micro defects in solids. This method allows us to reduce the strong nonlinearity of water and amplify the weak second harmonics generated at internal micro defects. In this method, both the fundamental and second harmonic frequencies are selected to match the resonant frequencies based on the resonant spectra of a sample. The detection of the micro defects in SiC f/Ti composite has been demonstrated. nonlinear acoustics, higher harmonics, resonance, water immersion, contact acoustic nonlinearity, micro defect, composite.
|Number of pages||2|
|Journal||Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers|
|Issue number||5 B|
|Publication status||Published - 2004 May|
ASJC Scopus subject areas
- Physics and Astronomy(all)