A maximum in the hardness of nanotwinned cadmium telluride

Zhang, Zhenyu; Wang, Bo; Zhang, Xianzhong

doi:10.1016/j.scriptamat.2013.10.012

Cited by 14 publications

(6 citation statements)

References 29 publications

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“…Combining Eqs. (10) and (11), it is found that the highest s and g values correspond to the highest likelihood of cracking. According to Griffith's theory [20], TB is a kind of defect, different from the pristine lattice.…”

mentioning

confidence: 91%

“…For the nt 5.6-17.9-7.8-5.6 in Figure 4, there are three TBs, forming two twins dominating the hardening effect for the upper twin and the softening effect for the lower twin [6,10]. Both twins have a synergistic effect, transferring and annihilating edge dislocations along TBs [23,24].…”

mentioning

confidence: 99%

“…The thickness of a twin denotes the spacing between adjacent twin boundaries (TBs), hereinafter referred to as k [6]. The maximum hardness of nt-CT is predicted by MD simulations when k is $16 nm [10], above which the hardness is predicted by the Hall-Petch equation; otherwise it obeys the reverse Hall-Petch relation. This means that when k >16, the hardening effect of nt-CT dominates, but when k <16, the softening effect prevails.…”

mentioning

confidence: 99%

“…CT is a face-centered cubic (fcc) crystal, whose slip orientations are along the {1 1 1} planes [10,11]. This is shown in Figures 2-4.…”

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confidence: 99%

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Deformation and crack mechanisms of nanotwinned cadmium telluride under cyclic nanoindentations

et al. 2014

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confidence: 91%

mentioning

confidence: 99%

mentioning

confidence: 99%

“…CT is a face-centered cubic (fcc) crystal, whose slip orientations are along the {1 1 1} planes [10,11]. This is shown in Figures 2-4.…”

mentioning

confidence: 99%

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Deformation and crack mechanisms of nanotwinned cadmium telluride under cyclic nanoindentations

et al. 2014

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“…The machecial properties of nanotwinned alloy metals remain largely unexplored, which are extremely significant to practial application. Recently, a new fabricate method of nanotwin was reported, based on the face-centered cubic(fcc) Cadmium telluride nanotwin nucleus using nanoindentation, with the increase of the hardness of the semiconductor, and retaining its ductility [6,7]. This method provides a new way of fabricating nanotwin materials.…”

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Deformation Twinning of Molecular Dynamics Simulation in a Ternary Titanium Alloy under Nanoindentation

Huang

Zhang

Cui

et al. 2016

MSF

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Nanotwinned (nt) metals exhibit excellent mechanical, electrical and thermal properties, and therefore attract much attentions. To fabricate large area nt surface, the fundamental mechanisms of deformation twinning induced by molecular dynamics (MD) are necessary to be explored. Nevertheless, MD of nt metals currently focus mainly on nt copper (Cu) and other single element metals with face-centered cubic (fcc) structure. In addition, MD simulations are usually performed on a built nt model, rather than from a single crystal, due to the difficulty of forming nanotwins. In this study, a single crystal is constructed in a ternary titanium (Ti) alloy with hexagonal closed-packed (hcp) lattice cell. Deformation twinning of MD simulation is performed in a ternary Ti alloy under nanoindentation from the built single crystal. Zonal structure is found during loading under nanoindentation, and nanograins transforms into nanotwins. Deformation twinning is significant to understanding the formation of nanotwins, as well as fabricating large area nt surface on a Ti alloy.

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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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A maximum in the hardness of nanotwinned cadmium telluride

Cited by 14 publications

References 29 publications

Deformation and crack mechanisms of nanotwinned cadmium telluride under cyclic nanoindentations

Deformation and crack mechanisms of nanotwinned cadmium telluride under cyclic nanoindentations

Deformation Twinning of Molecular Dynamics Simulation in a Ternary Titanium Alloy under Nanoindentation

Hyper‐Elastic Deformation via Martensitic Phase Transformation in Cadmium Telluride

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