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Deng M, Song C, Shi F, Zhang Y, Tian Y, Zhang W. Rapid and Non-Destructive Repair of Fused Silica with Cluster Damage by Magnetorheological Removing Method. MICROMACHINES 2021; 12:mi12030274. [PMID: 33800898 PMCID: PMC7999339 DOI: 10.3390/mi12030274] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 03/01/2021] [Accepted: 03/01/2021] [Indexed: 11/16/2022]
Abstract
The damage repair of fused silica based on the CO2 laser repair technique has been successfully applied in high-power laser systems in the controllable nuclear fusion field. However, this kind of repairing technique mainly focuses on large-scale laser damage with sizes larger than 200 μm, but ignores the influence of cluster small-scale damage with sizes smaller than 50 μm. In order to inhibit the growth of small-scale damage and further improve the effect of fused silica damage repair, this paper carried out a study on the repair of fused silica damage using the magnetorheological (MR) removing method. The feasibility of fused silica damage repairing was verified, and the evolution law of the number, morphology, and the surface roughness of small-scale damage were all analyzed. The results showed that the MR removing method was non-destructive compared to traditional repairing technologies. It not only effectively improved the whole damage repairing rate to more than 90%, but it also restored the optical properties and surface roughness of the damaged components in the repairing process. Based on the study of the MR removing repair law, a combined repairing process of 4 μm MR removal and 700 nm computer controlled optical surfacing (CCOS) removal is proposed. A typical fused silica element was experimentally repaired to verify the process parameters. The repairing rate of small-scale damage was up to 90.4%, and the surface roughness was restored to the level before repairing. The experimental results validate the effectiveness and feasibility of the combined repairing process. This work provides an effective method for the small-scale damage repairing of fused silica components.
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Affiliation(s)
- Mingjie Deng
- College of Intelligence Science and Technology, National University of Defense Technology, 109 Deya Road, Changsha 410073, China; (M.D.); (F.S.); (Y.Z.); (Y.T.); (W.Z.)
- Hunan Key Laboratory of Ultra-Precision Machining Technology, Changsha 410073, China
- Laboratory of Science and Technology on Integrated Logistics Support, National University of Defense Technology, 109 Deya Road, Changsha 410073, China
| | - Ci Song
- College of Intelligence Science and Technology, National University of Defense Technology, 109 Deya Road, Changsha 410073, China; (M.D.); (F.S.); (Y.Z.); (Y.T.); (W.Z.)
- Hunan Key Laboratory of Ultra-Precision Machining Technology, Changsha 410073, China
- Laboratory of Science and Technology on Integrated Logistics Support, National University of Defense Technology, 109 Deya Road, Changsha 410073, China
- Correspondence: ; Tel.: +86-135-7415-8421
| | - Feng Shi
- College of Intelligence Science and Technology, National University of Defense Technology, 109 Deya Road, Changsha 410073, China; (M.D.); (F.S.); (Y.Z.); (Y.T.); (W.Z.)
- Hunan Key Laboratory of Ultra-Precision Machining Technology, Changsha 410073, China
- Laboratory of Science and Technology on Integrated Logistics Support, National University of Defense Technology, 109 Deya Road, Changsha 410073, China
| | - Yaofei Zhang
- College of Intelligence Science and Technology, National University of Defense Technology, 109 Deya Road, Changsha 410073, China; (M.D.); (F.S.); (Y.Z.); (Y.T.); (W.Z.)
- Hunan Key Laboratory of Ultra-Precision Machining Technology, Changsha 410073, China
- Laboratory of Science and Technology on Integrated Logistics Support, National University of Defense Technology, 109 Deya Road, Changsha 410073, China
| | - Ye Tian
- College of Intelligence Science and Technology, National University of Defense Technology, 109 Deya Road, Changsha 410073, China; (M.D.); (F.S.); (Y.Z.); (Y.T.); (W.Z.)
- Hunan Key Laboratory of Ultra-Precision Machining Technology, Changsha 410073, China
- Laboratory of Science and Technology on Integrated Logistics Support, National University of Defense Technology, 109 Deya Road, Changsha 410073, China
| | - Wanli Zhang
- College of Intelligence Science and Technology, National University of Defense Technology, 109 Deya Road, Changsha 410073, China; (M.D.); (F.S.); (Y.Z.); (Y.T.); (W.Z.)
- Hunan Key Laboratory of Ultra-Precision Machining Technology, Changsha 410073, China
- Laboratory of Science and Technology on Integrated Logistics Support, National University of Defense Technology, 109 Deya Road, Changsha 410073, China
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Wang H, Wang C, Zhang M, Zheng E, Hou J, Chen X. Investigation of subsurface damage density and morphology impact on the laser-induced damage threshold of fused silica. APPLIED OPTICS 2019; 58:9839-9845. [PMID: 31873628 DOI: 10.1364/ao.58.009839] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 11/11/2019] [Indexed: 06/10/2023]
Abstract
The laser-induced damage threshold (LIDT) of fused silica is affected by laser field intensity modulation and laser energy absorption. In this paper, the subsurface damage (SSD) density and morphology are detected by the small-angle taper polishing method. The modulation effect of SSD morphology on the incident laser/electric field is analyzed by the finite difference time domain (FDTD) simulation. Finally, the LIDT of the taper polished surface is tested to analyze the relationship among LIDT, SSD density, and SSD morphology, and the results show a high correlation. A reliable regression model is obtained based on the results, which shows that LIDT is inversely proportional to SSD density and the light intensity enhancement factor (LIEF).
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Ye H, Li Y, Xu Q, Jiang C, Wang Z. Resistance of Scratched Fused Silica Surface to UV Laser Induced Damage. Sci Rep 2019; 9:10741. [PMID: 31341186 PMCID: PMC6656733 DOI: 10.1038/s41598-019-46048-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Accepted: 06/21/2019] [Indexed: 12/02/2022] Open
Abstract
Scratches in fused silica are notorious laser damage precursors to UV laser damage initiation. Ductile and brittle scratches were intentionally generated using various polishing slurries. The distribution, profile and the dimension of scratches were characterized. The damage resistance of polished surfaces was evaluated using raster scanning damage testing protocol. The results show that both ductile and brittle scratches greatly increase area proportion of laser damage about one to two orders of magnitude relative to unscratched surface and brittle scratches are more deleterious. Moreover, finite difference time domain (FDTD) simulation was used to numerically calculate the light field distribution around scratches on rear surface (i.e. exit surface for light) which indicates that modulated light intensity is susceptible to the profile and size of scratches. FDTD simulation results also indicate that the light field intensification is elevated with the dimension of scratches and light modulation effects in triangular scratches are usually not as notable as serrated and parabolic scratches.
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Affiliation(s)
- Hui Ye
- School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - Yaguo Li
- Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, 621900, China.
| | - Qiao Xu
- Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, 621900, China
| | - Chen Jiang
- School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - Zhonghou Wang
- School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
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