High Power Laser Science and Engineering, Volume. 9, Issue 2, 02000e19(2021)
A novel laser shock post-processing technique on the laser-induced damage resistance of 1ω HfO2/SiO2 multilayer coatings
Figures & Tables(9)
Fig. 1. Experimental schematic of (a) LSPP and (b) one-on-one damage test.
Fig. 2. The one-on-one damage probabilities of coatings without and with LSPP at overlapping rates of (a) 30% and (b) 50%.
Fig. 3. XRD patterns of coatings with LSPP at overlapping rate of (a) 30% and (b) 50%, with (c) and (d) showing the corresponding specific XRD patterns of the (020) peak.
Fig. 5. The two typical damage morphologies of coatings with LSPP processed by an energy of 0.6 J at overlapping rate of 30% tested by SEM at (a) 31.8 J/cm2 and (e) 74.9 J/cm2, respectively. SEM and FIB images of the central pits of coatings: (b) and (f) without LSPP damaged at 74.1 J/cm2; (c) and (g) with LSPP processed by energy of 0.6 J at overlapping rate of 30%, and damaged at 74.9 J/cm2; (d) and (h) with LSPP processed by energy of 0.2 J at overlapping rate of 50%, and damaged at 76.5 J/cm2.
Fig. 6. Size distribution of plasma scalds versus laser fluence of coatings: (a) without LSPP; (b)–(d) processed at an overlapping rate of 30%; (e)–(g) processed at an overlapping rate of 50%.
Fig. 7. The one-on-one damage probabilities of the 1064 nm HR coatings with or without LSPP under the different numbers of scans (a) at an overlapping rate of 30% and laser energy of 0.4 J and (b) at an overlapping rate of 50% and laser energy of 0.2 J.
Table 1. The minimum laser fluence inducing type I and type II damage morphologies for coatings without and with LSPP of different parameters.
View tableView in ArticleTable 1. The minimum laser fluence inducing type I and type II damage morphologies for coatings without and with LSPP of different parameters.
Fluence for Fluence for Sample type I (J/cm2) type II (J/cm2) Without LSPP 14.8 28.3 30%–0.4 J 16.7 30.6 30%–0.5 J 27.1 32.1 30%–0.6 J 31.8 41.4 50%–0.2 J 41.4 57.5 50%–0.3 J 31.5 39.5 50%–0.4 J 12.9 16.9
Table 2. The total pressure of LSPP processes and the obtained LIDT with different overlapping rates and laser energies.
View tableView in ArticleTable 2. The total pressure of LSPP processes and the obtained LIDT with different overlapping rates and laser energies.
Sample Total pressure LIDT (J/cm2) 30%–0.4 J 0.23β 12.9 30%–0.5 J 0.25β 19.5 30%–0.6 J 0.28β 27.8 50%–0.2 J 0.29β 36.7 50%–0.3 J 0.35β 27.6 50%–0.4 J 0.41β 10.7 30%–0.4 J–2 0.23 (1+ ${{\omega}}_{{2}}^{\prime }$ 15.9 50%–0.2 J–2 0.29 (1+ ${{\omega}}_{{2}}^{\prime \prime }$ 15.9
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Tangyang Pu, Wenwen Liu, Yueliang Wang, Xiaoming Pan, Leiqing Chen, Xiaofeng Liu. A novel laser shock post-processing technique on the laser-induced damage resistance of 1ω HfO2/SiO2 multilayer coatings[J]. High Power Laser Science and Engineering, 2021, 9(2): 02000e19
Paper Information
Category: Research Articles
Received: Nov. 12, 2020
Accepted: Jan. 19, 2021
Published Online: May. 18, 2021
The Author Email: Wenwen Liu (sophialww@163.com)
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