Anisotropic mechanical responses and plastic deformation mechanisms of cadmium telluride under indentations

Xu, Chao; Zhang, Weilu; Hu, Minyun; Zhang, Jing; Lang, Zhe; Li, Pengwei; Liu, Huaping; Wang, Pei; Liu, Chunmei

doi:10.1007/s00339-022-05873-7

Cited by 3 publications

(1 citation statement)

References 78 publications

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“…As a soft-brittle material, the fabrication of highquality surfaces on CdTe is challenging. Surface and subsurface damage including distorted atoms, dislocation loops, and micro-cracks are usually inevitable during machining [4,5], which can deteriorate the operating performance of CdTe-based devices [6,7]. In recent years, nanoscale machining techniques (NMT) such as nano-scratching, nano-cutting, and nano-grinding have been recognized as effective methods for manufacturing nanoscale surfaces with low subsurface damage.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Effects of Grain Size and Grinding Depth on Nano-Grinding of Cadmium Telluride Using Molecular Dynamics Simulation

Liu,

Yip,

et al. 2023

Nanomaterials

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Cadmium telluride (CdTe) is known as an important semiconductor material with favorable physical properties. However, as a soft-brittle material, the fabrication of high-quality surfaces on CdTe is quite challenging. To improve the fundamental understanding of the nanoscale deformation mechanisms of CdTe, in this paper, MD simulation was performed to explore the nano-grinding process of CdTe with consideration of the effects of grain size and grinding depth. The simulation results indicate that during nano-grinding, the dominant grinding mechanism could switch from elastic deformation to ploughing, and then cutting as the grinding depth increases. It was observed that the critical relative grain sharpness (RGS) for the transition from ploughing to cutting is greatly influenced by the grain size. Furthermore, as the grinding depth increases, the dominant subsurface damage mechanism could switch from surface friction into slip motion along the <110> directions. Meanwhile, as the grain size increases, less friction-induced damage is generated in the subsurface workpiece, and more dislocations are formed near the machined groove. Moreover, regardless of the grain size, it was observed that the generation of dislocation is more apparent as the dominant grinding mechanism becomes ploughing and cutting.

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Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Effects of Grain Size and Grinding Depth on Nano-Grinding of Cadmium Telluride Using Molecular Dynamics Simulation

Liu,

Yip,

et al. 2023

Nanomaterials

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Hyper‐Elastic Deformation via Martensitic Phase Transformation in Cadmium Telluride

Luo,

Han,

Cappola

et al. 2024

Adv Eng Mater

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Cadmium telluride (CdTe) is a highly promising material for photovoltaics and photodetectors due to its light‐absorbing properties. However, efficient design and use of flexible devices require a deep understanding of its atomic‐level deformation mechanism. Here, we investigate uniaxial compression deformation of CdTe monocrystalline with varying crystal orientations using molecular dynamics (MD) with a newly developed machine‐learning force field, alongside in‐situ micropillar compression experiments. Our findings reveal that CdTe bulk deformation is dominated by reversible martensitic phase transformation, whereas CdTe pillar deformation is primarily driven by dislocation nucleation and movement. CdTe monocrystals possess exceptional super‐recoverable deformation along the <100> orientation due to hyper‐elastic processes induced by martensitic transformation. This discovery not only sheds light on the peculiarities observed in micropillar experimental measurements but also provides pivotal insights into the fundamental deformation behaviors of CdTe and similar II‐VI compounds under various stress conditions. These insights are crucial for the innovative design and enhanced functionality of future flexible electronic devices.This article is protected by copyright. All rights reserved.

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Atomic structure, stability, and dissociation of dislocations in cadmium telluride

Luo

2023

International Journal of Plasticity

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Anisotropic mechanical responses and plastic deformation mechanisms of cadmium telluride under indentations

Cited by 3 publications

References 78 publications

Numerical Investigation on the Effects of Grain Size and Grinding Depth on Nano-Grinding of Cadmium Telluride Using Molecular Dynamics Simulation

Numerical Investigation on the Effects of Grain Size and Grinding Depth on Nano-Grinding of Cadmium Telluride Using Molecular Dynamics Simulation

Hyper‐Elastic Deformation via Martensitic Phase Transformation in Cadmium Telluride

Atomic structure, stability, and dissociation of dislocations in cadmium telluride

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