Nano-processing performance of optical glass

Xiao-guang, 郭晓光 Guo; Chang-heng, 翟昌恒 Zhai; Liang, 张亮 Zhang; Zhuji, 金洙吉 Jin; Dongming, 郭东明 Guo

doi:10.3788/ope.20142211.2959

Cited by 4 publications

(1 citation statement)

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“…Firstly, the simulation temperature is set to room temperature about 300K. After relaxation, the system starts heating at a rate of 2K/ps to 5000K, and the system is cooled to room temperature rapidly at a rate of 5K/ps [16]. According to the change of volume, the calculation results of the density and the nano hardness for the model is approximately 2.25g/cm3 and 10.5GPa, which are very close to the actual density and hardness of the silica glass.…”

Section: Modeling and Computationmentioning

confidence: 99%

Study on the Surface Damage Layer in Multiple Grinding of Quartz Glass by Molecular Dynamics Simulation

Liu

Guo

et al. 2017

JNanoR

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The paper focuses on the surface damage of quartz glass in multiple grinding, so as to find out the machining parameters that can improve the surface quality of quartz glass. Molecular dynamics (MD) method is adopted to machine the quartz glass. Firstly, the initial grinding is done on quartz glass with the depth of 12 Å. Based on the initial grinding, no feed grinding processes are done for three times separately and the feed grinding processes are carried out on the damage layer left by the previous process. By the coordination number (CN), machined surface topographies of quartz glass are gained and regions of densification are marked. Moreover, the damage layer thickness of different machined surface is also calculated. By analyzing the density of different surface damage layers, the regulation of the density distribution is obtained. Finally, the nanoindentation hardness is gained by different load-displacement curves in nanoindentation simulation. The results show that the first no feed grinding and the second feed grinding can improve the accuracy and quality of grinding. Too many no feed grinding processes and other feed grinding processes will induce serious damage of the machined surface, which is clearly showed in the obvious increase in the density, hardness and thickness of the damage layer. At last, the results of the density analysis and nanoindentation also proved that the densification and hardness of quartz glass cannot increase unlimited. The results can be applied in the ultra-precision grinding of quartz glass to control the thickness of damage layer and improve the quality of processing.

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Section: Modeling and Computationmentioning

confidence: 99%