A Pore Forming Method on Copper Sheet Bottom With Glass Substrate by Diamond Tip Indenting

Shi, Guangfeng; Ji, Na-Na; Liu, Jing; Shi, Guo-Quan

doi:10.1142/9789814759687_0108

Cited by 2 publications

(1 citation statement)

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“…The result of ultra fast laser drilling is good, but for some small and medium-sized enterprises, considering cost issues, they often choose low-cost microhole manufacturing methods. Shi et al [10][11][12] have conducted many studies on the manufacturing of diamond imprinted microholes, including the development of experimental equipment, simulation, parameter optimization, and detection analysis. Li et al 13 developed an ultrasonic vibration assisted microhole formation technique, which successfully formed a microhole on the skull using a conical tool with the help of ultrasonic vibration.…”

Section: Introductionmentioning

confidence: 99%

Molecular dynamics simulation and experimental study on formation mechanism of micro-hole and cracks in nano-imprinting diamond

Che,

Shi,

Meng

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part B:

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Diamond nano-imprint microhole forming technology is a new type of microhole forming method. However, there will always be some unqualified microholes and cracks in the manufacture of microholes. In order to obtain better microhole quality, it is crucial to study the mechanism of microhole formation. In this paper, the indentation process of single crystal copper by a conical indenter is simulated by molecular dynamics. After the indentation is completed, microholes and cracks will form on the surface of the copper sheet. Dislocation analysis will be conducted on the microholes and surrounding cracks, and then the microstructure and morphology will be demonstrated to explain the formation mechanism of microholes and cracks. The influence of different indentation speeds and temperatures on the energy change of the system is discussed. In addition, this article established an experimental device for diamond indentation of copper sheets, and conducted indentation microholes experiments to observe microholes and cracks through scanning electron microscopy. The results show that when the diamond indenter is pressed down, the number of atoms in contact between the diamond indenter particles and the copper surface gradually increases, causing local stress concentration and the formation of new dislocations. Among them, 1/6<112> shockley dislocation is the main dislocation type. When the strain energy stored in the lattice increases beyond a certain value, the lattice structure of the copper atoms in the contact area is broken, resulting in internal defects, gradually forming microholes and surrounding cracks. The increase in the imprinting speed will accelerate the plastic deformation of the copper sheet. This paper reveals the mechanism of the formation of microholes and cracks, laying the foundation for high-quality micropore manufacturing.

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Section: Introductionmentioning

confidence: 99%

Molecular dynamics simulation and experimental study on formation mechanism of micro-hole and cracks in nano-imprinting diamond

Che,

Shi,

Meng

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part B:

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Optical effect and pre-forming temperature field of in situ laser-assisted micro-stamping by a diamond indenter

et al. 2022

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During in situ laser-assisted micro-stamping (In-LAS) using a diamond indenter, the temperature of the machined area cannot be accurately predicted because of the coupling of the beam with the diamond indenter. This study uses geometrical optics and wave optics to determine the effect of the taper angle on laser direction, the light intensity distribution at the diamond indenter tip, and the temperature field of the machined area. This research provides data support and a theoretical basis for the selection of related process parameters of In-LAS and delivers a feasible theoretical method for a similar in situ laser-assisted machining.

show abstract

A Pore Forming Method on Copper Sheet Bottom With Glass Substrate by Diamond Tip Indenting

Cited by 2 publications

References 0 publications

Molecular dynamics simulation and experimental study on formation mechanism of micro-hole and cracks in nano-imprinting diamond

Molecular dynamics simulation and experimental study on formation mechanism of micro-hole and cracks in nano-imprinting diamond

Optical effect and pre-forming temperature field of in situ laser-assisted micro-stamping by a diamond indenter

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