Journal
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
Volume 51, Issue -, Pages 60-70Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.mssp.2016.05.003
Keywords
Molecular dynamics; Dislocation nucleation; Amorphization; Nanometric cutting; Single crystalline silicon
Categories
Funding
- EPSRC [EP/K018345/1, EP/K000586/1]
- Royal Society-NSFC International Exchange Programme [IE141422]
- National Science Foundation [ACI-1053575]
- EPSRC [EP/K031260/1, EP/K000586/1, EP/K018345/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/K000586/1, EP/K031260/1, EP/K018345/1] Funding Source: researchfish
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The nucleation and propagation of dislocations and its consequence on the defect structure in silicon during nanometric cutting are not well known, although the amorphization and high pressure phase transformation studies on silicon have remained at the epicentre of research across various disparate disciplines for over a decade. This paper proposes a new mechanism of crystal plasticity identified by a fully automated dislocation extraction algorithm in molecular dynamics simulations of nanometric cutting of silicon for different cutting planes/directions at a wide range of temperatures (300-1500 K). Alongside amorphization of silicon, our simulations revealed nanoscale stochastic nucleation of dislocations and stacking faults, which serve as mediators of microscopic plasticity during various contact loading operations and manufacturing processes of silicon. Of interest is that, irrespective of the cutting temperature, the stacking faults, which were not formed for either the (010)[(1) over bar 00] or (in Viol crystal setups, were generated with three atomic layers in the (110)[00 (1) over bar] cutting. (C) 2016 The Authors. Published by Elsevier Ltd.
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