1. Laser-induced layers peeling of sputtering coatings at 1064 nm wavelength.
- Author
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Guo, Kesheng, Wang, Yanzhi, Chen, Ruiyi, Zhang, Yuhui, Sytchkova, Anna, Zhu, Meiping, Yi, Kui, He, Hongbo, and Shao, Jianda
- Subjects
WAVELENGTHS ,SPUTTERING (Physics) ,IONIZATION (Atomic physics) ,MECHANICAL behavior of materials ,THERMOPHYSICAL properties - Abstract
Large-scale layers peeling after the laser irradiation of dual ion beam sputtering coatings is discovered and a model is established to explain it. The laser damage morphologies relate to the laser fluence, showing thermomechanical coupling failure at low energy and coating layers separation at high energy. High-pressure gradients appear in the interaction between laser and coatings, resulting in large-scale layer separation. A two-step laser damage model including defect-induced damage process and ionized air wave damage process is proposed to explain the two phenomena at different energy. At relatively high energies (higher than 20 J/cm
2 ), ionization of the air can be initiated, leading to a peeling off effect. The peeling effect is related to the thermomechanical properties of the coating materials. [ABSTRACT FROM AUTHOR]- Published
- 2021
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