<trans-title xml:lang="en">Fused Silica Glass: Laser-induced Damage on Bending Strength Weakening and Safety Design</trans-title>

Sai JIN; Xiaogen LIU; Shuang QI; Runchang ZHAO; Zhijun LI

doi:10.15541/jim20220610

Journal of Inorganic Materials, Volume. 38, Issue 6, 671(2023)

Fused Silica Glass: Laser-induced Damage on Bending Strength Weakening and Safety Design

Sai JIN¹, Xiaogen LIU^2、*, Shuang QI², Runchang ZHAO¹, and Zhijun LI¹

Author Affiliations

¹1. Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China

²2. State Key Laboratory of Green Building Materials, China Building Materials Academy, Beijing 100024, China

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Figures & Tables(12)

1. Photo of optical elements with damage points in the fused silica glass vacuum window

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2. Diagram and physical picture of the sample

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3. Diagram of the damage point in a sample

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4. Measurement of morphology and size of damage point (a) Maximum size (2a); (b) Maximum depth (c)

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5. Damage length (2a) and depth (c) of the damage points in various samples

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6. Test results of average bending strength of the samples with and without damage point

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7. Relationship between damage point length and bending strength of the samples

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8. Fitting curve between damage point length and bending strength of the samples

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9. Relationship between damage point depth and bending strength of the samples

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10. Relationship between 2a/c values of the damage point and bending strength of the samples

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Table 1. Inversion values of bending strength of fused silica glass corresponding to different damage point sizes

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Table 1. Inversion values of bending strength of fused silica glass corresponding to different damage point sizes

Length/mm	Bending strength/MPa	Length/mm	Bending strength/MPa
0	75.9	21	26.05
1	39.86	22	25.88
2	36.18	23	25.72
3	34.19	24	25.57
4	32.84	25	25.42
5	31.83	26	25.28
6	31.03	27	25.15
7	30.37	28	25.02
8	29.81	29	24.90
9	29.32	30	24.78
10	28.89	31	24.67
11	28.51	32	24.56
12	28.17	33	24.45
13	27.85	34	24.35
14	27.57	35	24.25
15	27.30	36	24.16
16	27.06	37	24.07
17	26.83	38	23.98
18	26.62	39	23.89
19	26.42	40	23.81
20	26.23	-	-

Table 2. K₂ and K values of the fused silica glass under various load action time
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Table 2. K₂ and K values of the fused silica glass under various load action time
Load action time K₁ K₂ K
≤1 min 2.5 1.00 2.50
1 d 2.5 1.85 4.63
30 d 2.5 2.27 5.68
180 d 2.5 2.50 6.25
1 a 2.5 2.63 6.58
3 a 2.5 2.78 6.95
5 a 2.5 2.94 7.35

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Sai JIN, Xiaogen LIU, Shuang QI, Runchang ZHAO, Zhijun LI. Fused Silica Glass: Laser-induced Damage on Bending Strength Weakening and Safety Design[J]. Journal of Inorganic Materials, 2023, 38(6): 671

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Paper Information

Category:

Received: Oct. 17, 2022

Accepted: --

Published Online: Oct. 17, 2023

The Author Email: Xiaogen LIU (xtlxg@163.com)

DOI:10.15541/jim20220610

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Inversion values of bending strength of fused silica glass corresponding to different damage point sizes

Table 1. Inversion values of bending strength of fused silica glass corresponding to different damage point sizes

Table 2. K2 and K values of the fused silica glass under various load action time

Table 2. K2 and K values of the fused silica glass under various load action time

Table 2. K₂ and K values of the fused silica glass under various load action time

Table 2. K₂ and K values of the fused silica glass under various load action time