Grain boundary deformation in uniaxial strained Nb3Sn

Qiao, Li; Yang, Jiachao; Yang, Xujia; Han, Ke; Li, Zhiqiang; Xiao, Gesheng; Yang, Lin

doi:10.1016/j.cryogenics.2020.103210

Cited by 2 publications

(1 citation statement)

References 30 publications

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“…The mechanical deformation of Nb 3 Sn has a direct effect on the microstructural (lattice structure) changes, which results in changes in the phonon spectrum, the electronic band structures, and the physical parameters of electron-phonon coupling. To the best of our knowledge, few numerical studies [62] have been conducted to investigate the microscopic mechanical behaviors in the deformation process of the polycrystalline Nb 3 Sn superconducting phase. In this section, the stress/strain distribution of polycrystalline Nb 3 Sn is studied at the microscopic level.…”

Section: Numerical Voronoi Tessellation Simulation Of Stress and Stra...mentioning

confidence: 99%

Analysis of the strain dependence of the superconducting critical properties of single-crystal and polycrystalline Nb₃Sn

Ding¹,

Gao²

2021

Supercond. Sci. Technol.

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The aim of this article is to present a three-dimensional (3D) simulation based on Voronoi tessellation, used to assess the strain dependence of the superconducting critical properties of inhomogeneous polycrystalline Nb3Sn at the microstructural level. To support this objective, we first present a polycrystalline model with equiaxed grains used to analyze the relationship between the polycrystalline structure and the strain response. We analyze the Young’s moduli of Nb3Sn at different temperatures with random and preferential polycrystalline orientations, and the relation between the Young’s modulus of polycrystalline Nb3Sn and spontaneous tetragonal transformation is discussed. The results indicate that the elastic properties (Young’s modulus, stress/strain field) of polycrystalline Nb3Sn are mainly associated with ambient temperature and phase transition and are affected by the grain orientation. Meanwhile, an estimation-based model for the superconducting critical properties of single-crystal Nb3Sn is proposed. This model is based on changes in the electron density of states and phonon frequency induced by strain. The results calculated by the estimation-based model are consistent with the experimental data and the values calculated according to first principles. The change in the strain-induced superconducting properties of polycrystalline Nb3Sn is analyzed by combining the numerically simulated strain field of the polycrystal with the estimation-based model of single-crystal Nb3Sn. Compared to ideal single-crystal Nb3Sn, the superconducting critical temperature of the polycrystalline Nb3Sn superconductor has a higher strain sensitivity, which is related to the non-uniformity of the strain field of the polycrystal.

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Section: Numerical Voronoi Tessellation Simulation Of Stress and Stra...mentioning

confidence: 99%

Analysis of the strain dependence of the superconducting critical properties of single-crystal and polycrystalline Nb₃Sn

Ding¹,

Gao²

2021

Supercond. Sci. Technol.

View full text Add to dashboard Cite

show abstract

Microscopic origin of the abnormal elastic behavior accompanying the superconducting transition in Nb3Sn crystals: An extended ab initio study

Yang

Qiao

et al. 2023

Journal of Alloys and Compounds

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Grain boundary deformation in uniaxial strained Nb3Sn

Cited by 2 publications

References 30 publications

Analysis of the strain dependence of the superconducting critical properties of single-crystal and polycrystalline Nb₃Sn

Analysis of the strain dependence of the superconducting critical properties of single-crystal and polycrystalline Nb₃Sn

Microscopic origin of the abnormal elastic behavior accompanying the superconducting transition in Nb3Sn crystals: An extended ab initio study

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Grain boundary deformation in uniaxial strained Nb3Sn

Cited by 2 publications

References 30 publications

Analysis of the strain dependence of the superconducting critical properties of single-crystal and polycrystalline Nb3Sn

Analysis of the strain dependence of the superconducting critical properties of single-crystal and polycrystalline Nb3Sn

Microscopic origin of the abnormal elastic behavior accompanying the superconducting transition in Nb3Sn crystals: An extended ab initio study

Contact Info

Product

Resources

About

Analysis of the strain dependence of the superconducting critical properties of single-crystal and polycrystalline Nb₃Sn

Analysis of the strain dependence of the superconducting critical properties of single-crystal and polycrystalline Nb₃Sn