Study of AFM-based nanometric cutting process using molecular dynamics

Zhu, Pengzhe; Hu, Yuanzhong; Ma, Tianbao; Wang, Hui

doi:10.1016/j.apsusc.2010.05.044

Cited by 104 publications

(41 citation statements)

References 20 publications

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“…When the distance between two passes is less than a critical value, there is a strong possibility that the dislocation generated by second pass will extend and affect the finished surface of the first cutting pass, thus resulting in represent of first nano-groove. However, it is noted that this critical value is not fixed as the dislocation nucleation and movements are affected by the tool geometry, depth of cut, cutting speed and local temperature [19]. 1 For multi-tip tool cutting, it can be seen from figure 4 (a) and (b) that the initial cutting stage was almost the same as that of using single tip tool, i.e.…”

Section: Formation Of Nanostructuresmentioning

confidence: 87%

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An atomistic investigation on the mechanism of machining nanostructures when using single tip and multi-tip diamond tools

Tong

Liang

Jiang

et al. 2014

Applied Surface Science

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In our previous work, a scale-up fabrication approach to cost effectively manufacturing nano-gratings over large area has been developed through diamond turning by using a multi-tip diamond tool fabricated by Focused IonBeam. The objective of this study is to gain an in-depth understanding of the mechanism of machining nanostructures on single crystal copper through diamond turning when using a single tip and a multi-tip nanoscale diamond tool. For this purpose atomistic models of a single tip tool for multi-pass cutting and a multi-tip tool for single-pass cutting were built, respectively. The nature of the cutting chip formation, dislocation nucleation and propagation, cutting forces, and temperature distribution during nanometric cutting processes were studied through molecular dynamics (MD) simulations. Results show that nanostructure generation process at steady cutting stage was governed by a strong localization of the dislocation movement and the dynamic equilibrium of chip-tool contact area. Except the apparent improvement of machining efficiency that proportional to the tool tip numbers, the nano-grooves generated by multi-tip tool also have higher centre symmetry than those machined by single tip tool.While the average tangential cutting force per tip were calculated all around 33.3 nN, a larger normal cutting force per tip being 54.1nN was observed when using a multi-tip tool. A concept of atomistic equivalent temperature was proposed and used to analysis the important features of temperature distribution during the machining process. The advantage, disadvantage and applicability of diamond turning using multi-tip tool were discussed in comparison with those of using single-tip tool. The findings suggest that diamond turning using multi-tip tool might be more applicable than using single tip tool when apply to scale-up fabrication of periodic nanostructures.

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Section: Formation Of Nanostructuresmentioning

confidence: 87%

“…It should be pointed out that the isolated atoms with green color which are inside the workpiece are not lattice defects. Those atoms with CSP above three are caused by the thermal vibration at finite temperature [14,19]. Moreover, the defect-free atoms were removed from the visualizations.…”

Section: Formation Of Nanostructuresmentioning

confidence: 99%

An atomistic investigation on the mechanism of machining nanostructures when using single tip and multi-tip diamond tools

Tong

Liang

Jiang

et al. 2014

Applied Surface Science

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“…Müser [38] studied the kinetic friction dependence on temperature and scratch velocity by using the Prandtl-Tomlinson model. Also, as indicated by Zhu et al [39,40], a higher cutting velocity would result in a larger chip volume in front of the indenter, both cutting force as well as the normal force, and the temperature would affect the chip volume in front of the indenter. Sørensen et al [41] reported that the friction force fluctuations were affected by the temperature and sliding speed, which were related with the excitation of phonons and energy dissipation.…”

Section: Comparison With Other Researchmentioning

confidence: 99%

Nanoscale Friction Behavior of the Ni-Film/Substrate System Under Scratching Using MD Simulation

Liu

Wei

2012

Tribol Lett

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The friction behavior of the nanoscratching process is investigated using molecular dynamic simulations by considering a sphere indenter sliding against a nickel nanofilm structure. In the film/substrate system, the interface-dominated friction process is studied during the nanoscratch process. The results indicate that the interface accommodates deformation during the scratch by absorbing plastic deformation (such as stacking faults and partial dislocations) and by allowing locally interface slip. The observed local material shuffling beneath the tip that was strongly affected by the interface and friction mechanisms, including material ploughing along the track, filling in of the track, and piling up of the chip in front of the tip, are discussed. The combination effects of both scratching depths and film thicknesses were also investigated.

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“…On the other hand, molecular dynamics (MD) simulations have been effectively used to address some fundamental issues related to nanometric cutting of copper such as the emulation of the material removal process [9], the cutting heat generated at different cutting speeds [10], the effect of depth of cut [11] and feed rate [9], and the role of friction on tool wear [12,13]. Recently, the difference of machining nanostructures between using single tip and multi-tip diamond cutting tools has also been reported [14,15].…”

Section: Introductionmentioning

confidence: 99%

Investigation of a scale-up manufacturing approach for nanostructures by using a nanoscale multi-tip diamond tool

Tong

Luo

Sun

et al. 2015

Int J Adv Manuf Technol

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Increasing interest in commercializing functional nanostructured devices heightens the need for cost effective manufacturing approaches for nanostructures. This paper presents an investigation of a scale-up manufacturing approach for nanostructures through diamond turning using a nanoscale multi-tip diamond tool (four tip tool with tip width of 150 nm) fabricated by focused ion beam (FIB). The manufacturing capacity of this new technique is evaluated through a series of cutting trials on copper substrates under different cutting conditions (depth of cut 100-500 nm, spindle speed 12-120 rpm). The machined surface roughness and nanostructure patterns are measured by using a white light interferometer and a scanning electron microscope, respectively. Results show that the form accuracy and integrity of the machined nanostructures were degraded with the increase of the depth of cut and the cutting speed. The burr and the structure damage are two major machining defects. High precision nano-grooves (form error of bottom width < 6.7 %) was achieved when a small depth of cut of 100 nm was used (spindle speed = 12 rpm). Initial tool wear was found at both the clearance cutting edge and the side edges of tool tips after a cutting distance of 2.5 km. Moreover, the nanometric cutting process was emulated by molecular dynamics (MD) simulations. The research findings obtained from MD simulation reveal the underlying mechanism for machining defects and the initialization of tool wear observed in experiments.

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Study of AFM-based nanometric cutting process using molecular dynamics

Cited by 104 publications

References 20 publications

An atomistic investigation on the mechanism of machining nanostructures when using single tip and multi-tip diamond tools

An atomistic investigation on the mechanism of machining nanostructures when using single tip and multi-tip diamond tools

Nanoscale Friction Behavior of the Ni-Film/Substrate System Under Scratching Using MD Simulation

Investigation of a scale-up manufacturing approach for nanostructures by using a nanoscale multi-tip diamond tool

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