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Ultrasonic characterization of modified Cr_2O_3 coatings by reflection coefficient spectroscopy |
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| Authors: | LI Ji-cheng LIN Li LI Xi-meng LI Guang LEI Ming-kai Nondestructive Testing Evaluation Laboratory School of Materials Science Engineering Dalian University of Technology Dalian China |
| Affiliation: | LI Ji-cheng1,LIN Li1,LI Xi-meng1,LI Guang2,LEI Ming-kai3 1.Nondestructive Testing , Evaluation Laboratory,School of Materials Science , Engineering,Dalian University of Technology,Dalian 116024,China,2.Department of Mechanical Engineering,Beijing Institute of Graphic Communication,Beijing 102600,3.Surface Engineering Laboratory,Dalian University of Techno logy |
| Abstract: | Pores,microcracks and density of plasma sprayed Cr2O3 coatings before and after high-intensity pulsed ion beam(HIPIB) irradiation were investigated using the ultrasonic reflection coefficient spectroscopy(URCS).The URCS was analyzed based on an acoustic transmission model for the multi-layered structure.The longitudinal velocity in the coatings was calculated from the experimental URCS,and the attenuation coefficient expression was deduced by comparing the experimental and numerical fitting amplitude spectr... |
| Keywords: | ultrasonic characterization Cr2O3 coating high-intensity pulsed ion beam ultrasonic reflection coefficient attenuation coefficient |
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