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Nanocutting mechanism of 6H-SiC investigated by scanning electron microscope online observation and stress-assisted and ion implant-assisted approaches


Nanocutting mechanism of single crystal 6H-SiC is investigated through a novel scanning electron microscope setup in this paper. Various undeformed chip thicknesses on (0001) < 1–100 > orientation are adopted in the nanocutting experiments. Phase transformation and dislocation activities involved in the 6H-SiC nanocutting process are also characterized and analyzed. Two methods of stress-assisted and ion implant-assisted nanocutting are studied to improve 6H-SiC ductile machining ability. Results show that stress-assisted method can effectively decrease the hydrostatic stress and help to activate dislocation motion and ductile machining; ion implant-induced damages are helpful to improve the ductile machining ability from MD simulation and continuous nanocutting experiments under the online observation platform.

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silicon carbide


scanning electron microscope


electron backscatter diffraction


focused ion beam


analytical bond order potential


dislocation extraction algorithm


Stopping and Range of Ions in Matter


molecular dynamics


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The authors thank Dr. B. Liu, Dr. H.S. Jiao, and Prof. C. Wang for valuable discussions.


The study is supported by the National Natural Science Foundation of China (No. 51575389, 51761135106), National Key Research and Development Program of China (2016YFB1102203), State Key Laboratory of Precision Measuring Technology and Instruments (Pilt1705), and the “111” Project by the State Administration of Foreign Experts Affairs and the Ministry of Education of China (Grant No. B07014).

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Correspondence to Zongwei Xu.

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Xu, Z., Liu, L., He, Z. et al. Nanocutting mechanism of 6H-SiC investigated by scanning electron microscope online observation and stress-assisted and ion implant-assisted approaches. Int J Adv Manuf Technol 106, 3869–3880 (2020).

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  • Diamond turning
  • Silicon carbide
  • Phase transformation
  • Surface integrity
  • MD simulation
  • Ion beam machining