1. Non-destructive testing of ceramic materials using mid-infrared ultrashort-pulse laser
- Author
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X. Y. An, Ya-Tao Ren, Yao-Bin Qiao, Shuangcheng Sun, Liming M. Ruan, and Hong Qi
- Subjects
Materials science ,Physics and Astronomy (miscellaneous) ,General Physics and Astronomy ,Inverse ,02 engineering and technology ,Geometric shape ,01 natural sciences ,law.invention ,010309 optics ,chemistry.chemical_compound ,Optics ,law ,Nondestructive testing ,0103 physical sciences ,Silicon carbide ,Radiative transfer ,Ceramic ,Ultrashort pulse laser ,business.industry ,General Engineering ,021001 nanoscience & nanotechnology ,Laser ,chemistry ,visual_art ,visual_art.visual_art_medium ,0210 nano-technology ,business - Abstract
The non-destructive testing (NDT) of ceramic materials using mid-infrared ultrashort-pulse laser is investigated in this study. The discrete ordinate method is applied to solve the transient radiative transfer equation in 2D semitransparent medium and the emerging radiative intensity on boundary serves as input for the inverse analysis. The sequential quadratic programming algorithm is employed as the inverse technique to optimize objective function, in which the gradient of objective function with respect to reconstruction parameters is calculated using the adjoint model. Two reticulated porous ceramics including partially stabilized zirconia and oxide-bonded silicon carbide are tested. The retrieval results show that the main characteristics of defects such as optical properties, geometric shapes and positions can be accurately reconstructed by the present model. The proposed technique is effective and robust in NDT of ceramics even with measurement errors.
- Published
- 2018
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