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

Zhen Tong, Yingchun Liang, Xiangqian Jiang, Xichun Luo

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

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 Ion Beam. 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 center 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 54.1 nN 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.
LanguageEnglish
Pages458-465
Number of pages8
JournalApplied Surface Science
Volume290
DOIs
Publication statusPublished - 30 Jan 2014

Fingerprint

Diamond
Nanostructures
Diamonds
Machining
Temperature distribution
Fabrication
Focused ion beams
Molecular dynamics
Copper
Nucleation

Keywords

  • nanostructure
  • machining mechanism
  • molecular dynamics
  • nanometric cutting
  • multi-tip tool

Cite this

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title = "An atomistic investigation on the mechanism of machining nanostructures when using single tip and multi-tip diamond tools",
abstract = "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 Ion Beam. 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 center 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 54.1 nN 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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author = "Zhen Tong and Yingchun Liang and Xiangqian Jiang and Xichun Luo",
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An atomistic investigation on the mechanism of machining nanostructures when using single tip and multi-tip diamond tools. / Tong, Zhen; Liang, Yingchun; Jiang, Xiangqian; Luo, Xichun.

In: Applied Surface Science, Vol. 290, 30.01.2014, p. 458-465.

Research output: Contribution to journalArticle

TY - JOUR

T1 - An atomistic investigation on the mechanism of machining nanostructures when using single tip and multi-tip diamond tools

AU - Tong, Zhen

AU - Liang, Yingchun

AU - Jiang, Xiangqian

AU - Luo, Xichun

N1 - Notice: This is the author’s version of a work that was accepted for publication in Applied Surface Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published: Zhen Tong, Yingchun Liang, Xiangqian Jiang, Xichun Luo, An atomistic investigation on the mechanism of machining nanostructures when using single tip and multi-tip diamond tools, Applied Surface Science, Volume 290, 30 January 2014, Pages 458-465, ISSN 0169-4332, http://dx.doi.org/10.1016/j.apsusc.2013.11.113.

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Y1 - 2014/1/30

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KW - nanometric cutting

KW - multi-tip tool

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