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Elastic Anisotropic and Thermodynamic Properties of Two BC₇ Phases

100%
Xing M., Li B., Yu Z., Chen Q.
Acta Physica Polonica A
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2017
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vol. 132
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issue 4
1340-1346
EN
The structural, elastic, anisotropic, and thermodynamic properties of P3m1-BC₇ and Pmm2-BC₇ have been studied in this paper utilizing first-principles calculations. In comparison with the elastic properties of Pmm2-BC₇, P3m1-BC₇ exhibits slightly higher values in bulk modulus and B/G, with similar values in shear modulus, the Young modulus, and the Poisson ratio. The calculated Pugh modulus ratio (B/G) and the Poisson ratio demonstrates P3m1-BC₇ from brittle to ductile at 93.60 and 93.73 GPa, respectively. Calculations of shear anisotropic factor, universal elastic anisotropy index, shear modulus, the Young modulus, and the Poisson ratio for BC₇ then demonstrate that Pmm2-BC₇ exhibits a larger elastic anisotropy than P3m1-BC₇. Quasi-harmonic Debye model is finally applied to investigate the Debye temperature, the coefficient of thermal expansion, heat capacity and Grüneisen parameter of Pmm2-BC₇ and P3m1-BC₇.
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Influence of magnetic anisotropy on flux density changes in dynamo steel sheets

88%
Mazgaj W., Szular Z., Warzecha A.
Archives of Electrical Engineering
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2015
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vol. 64
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issue 1
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