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Advances in Manufacturing

25-01-2025

Deformation mechanism of gallium nitride in nanometric cutting

Authors: Xu Ma, Min Lai, Feng-Zhou Fang

Published in: Advances in Manufacturing

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Abstract

Gallium nitride (GaN) is a third-generation semiconductor and an important optical material requiring high surface integrity. In this study, molecular dynamics simulations were conducted to investigate the machining mechanism of single-crystal GaN during nanometric cutting. The stress distribution and generation/motion of dislocations in GaN during nanometric cutting were found to be closely related to slip systems. The relationship between the crystal phase transformation and dislocations during cutting was also identified. Microcracks occur during the unloading of stress perpendicular to the (0 0 0 1) plane. The fluctuation of the cutting forces during cutting was explained from the perspective of crystal phase transformation. This study helps understand the deformation mechanism of materials with hexagonal close-packed crystal structures in nanometric cutting and promotes the development of relevant mechanical processing technologies.

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Title: Deformation mechanism of gallium nitride in nanometric cutting
Authors: Xu Ma
Min Lai
Feng-Zhou Fang
Publication date: 25-01-2025
Publisher: Shanghai University
Published in: Advances in Manufacturing
Print ISSN: 2095-3127
Electronic ISSN: 2195-3597
DOI: https://doi.org/10.1007/s40436-024-00534-9