An experimental investigation on slicing of potassium dihydrogen phosphate crystal

Wang, Qiangguo; Gao, Hang; Pei, Zhijian; Guo, Dongming; Teng, Xinying

doi:10.1177/0954405413478263

Cited by 5 publications

(3 citation statements)

References 10 publications

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“…Wang, et al studied the deviation of crystal plane orientation, parallelism between opposite surfaces and the sub-surface damages introduced in KDP slicing process. After the final slicing step, the machining allowance, which needs to be removed in the following diamond cutting process, was reported as 544m [23] . Based on the study of Wang et al and the experimental results, a grinding process chain is proposed.…”

Section: Efficiency Of the Precision Grinding Methodsmentioning

confidence: 99%

Realization of high efficiency and low damage machining of anisotropic KDP crystal by grinding

Xie

Jin

et al. 2019

Precision Engineering

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Section: Efficiency Of the Precision Grinding Methodsmentioning

confidence: 99%

Realization of high efficiency and low damage machining of anisotropic KDP crystal by grinding

Xie

Jin

et al. 2019

Precision Engineering

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“…In the processing of KDP crystal, the cutting parameters were optimised to forecast and improve the surface quality and topography through the analyses of cutting simulation or experiment. 11–14 Modelling and simulating of cutting process were also used to analyse and evaluate the machined surface topography of other materials. 15,16 Cao et al 17 proposed a more reasonable selection method of cutting parameters based on surface roughness of workpiece.…”

Section: Introductionmentioning

confidence: 99%

The influence of cutting parameters on micro-topography of frequency features extracted from the machined KH₂PO₄ surfaces

Pang

Kuang

2020

Proceedings of the Institution of Mechanical Engineers, Part B:

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Using reasonable cutting parameters of machining process is an effective and convenient means of improving the topography of the machined surfaces. In this study, the methods to find optimised cutting parameters can be obtained by studying the relationship between the cutting parameters and the micro-topography of frequency features in the machined KH2PO4 surfaces. Using the power spectral density and continuous wavelet transform methods, the 2D micro-topographies of frequencies corresponding to different cutting parameters are extracted from the machined KH2PO4 surfaces. The results for the extracted micro-topography are used to analyse the influence of cutting parameters on the spatial frequency feature which consists of the wavelength and amplitude. The middle-frequency feature reflects the variations of depth of cut and spindle speed, and the amplitude of it is directly proportional to depth of cut and spindle speed. The low-frequency feature reflects the variations of the feed rate and decreases to a smaller value when the feed rate increases. The high-frequency feature is mainly affected by the material properties and the vibrations that occur during processing. Comparing the micro-topography of frequencies under different cutting parameters, the depth of cut (3 μm), the spindle speed (400 r/min) and the feed rate (8 μm/r) are the optimised cutting parameters for the machine tools used in this article. In the process of reconstructing the arbitrary frequency topography, the continuous wavelet transform method can compensate for the deficiencies of the power spectral density method for extracting frequencies.

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“…However, the laser damage threshold (LDT) of a machined KDP crystal is far below its intrinsic damage threshold 7–9 , which has become one of the key technical bottlenecks that severely hinders the development of ICF reactors. Hence, extensive studies on machining-induced damage and its effect on the properties of the KDP material have been carried out 10–14 . For example, on a micron or larger scale, various surface and subsurface defects, such as pits, cracks, and nicks, caused during KDP lens surfacing by different methods have been reported.…”

Section: Introductionmentioning

confidence: 99%

Atomic scale study of stress-induced misaligned subsurface layers in KDP crystals

Zhu

Xiao

et al. 2019

Sci Rep

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We carried out ab initio calculations to study the atomic configuration, band structure and optical absorption of the lattice misalignment structure (LMS) in a subsurface layer of a machined KH 2 PO 4 (KDP) crystal. By varying the different degrees of misalignment, the changes in the corresponding atomic position and bond and energy are obtained, and their correlations are analysed in detail. The results indicate that in the LMS evolution, the variation in the proton distribution around the oxygen atoms plays an important role, and many local stable LMSs appear. Interestingly, at a certain misalignment value, the total system energy of the local stable LMS is near that of a perfect KDP crystal. For some local stable LMSs, the electronic and optical properties related to the laser damage threshold (LDT) of KDP are further studied. The results show that in comparison with a perfect KDP crystal, the band gaps of local stable LMSs at some certain misalignment values become narrow, and their optical absorption curves produce an obvious redshift. These facts demonstrate that the emergence of the LMS could have a significant impact on the optical absorption of the KDP material and thus affect the LDT of KDP under certain working conditions.

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An experimental investigation on slicing of potassium dihydrogen phosphate crystal

Cited by 5 publications

References 10 publications

Realization of high efficiency and low damage machining of anisotropic KDP crystal by grinding

Realization of high efficiency and low damage machining of anisotropic KDP crystal by grinding

The influence of cutting parameters on micro-topography of frequency features extracted from the machined KH₂PO₄ surfaces

Atomic scale study of stress-induced misaligned subsurface layers in KDP crystals

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An experimental investigation on slicing of potassium dihydrogen phosphate crystal

Cited by 5 publications

References 10 publications

Realization of high efficiency and low damage machining of anisotropic KDP crystal by grinding

Realization of high efficiency and low damage machining of anisotropic KDP crystal by grinding

The influence of cutting parameters on micro-topography of frequency features extracted from the machined KH2PO4 surfaces

Atomic scale study of stress-induced misaligned subsurface layers in KDP crystals

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The influence of cutting parameters on micro-topography of frequency features extracted from the machined KH₂PO₄ surfaces