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Structural, Anisotropic and Thermodynamic Properties of Imm2-BCN

Structural, Anisotropic and Thermodynamic Properties of Imm2-BCN
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摘要 Structural, anisotropic, and thermodynamic properties of Imm2-BCN were studied based on density function theory with the ultrasoft psedopotential scheme in the frame of the generalized gradient approximation(GGA). The elastic constants were confirmed that the predicted Imm2-BCN is mechanically stable. The anisotropy of elastic properties were also studied systematically. The anisotropy studies of Young's modulus, shear modulus, linear compressibility, and Poisson's ratio show that the Imm2-BCN exhibits a large anisotropy. Through the quasi-harmonic Debye model, the relations between the equilibrium volume V, thermal expansion α, the heat capacity C_V and CP, the Grüneisen parameter γ, and the Debye temperature Θ_D with pressure P and temperature T were also studied systematically. Structural, anisotropic, and thermodynamic properties of Imm2-BCN were studied based on density function theory with the ultrasoft psedopotential scheme in the frame of the generalized gradient approximation(GGA). The elastic constants were confirmed that the predicted Imm2-BCN is mechanically stable. The anisotropy of elastic properties were also studied systematically. The anisotropy studies of Young's modulus, shear modulus, linear compressibility, and Poisson's ratio show that the Imm2-BCN exhibits a large anisotropy. Through the quasi-harmonic Debye model, the relations between the equilibrium volume V, thermal expansion α, the heat capacity C_V and CP, the Grüneisen parameter γ, and the Debye temperature Θ_D with pressure P and temperature T were also studied systematically.
出处 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2016年第6期1272-1279,共8页 武汉理工大学学报(材料科学英文版)
基金 Funded by the Fund for Talents of Yunnan Province,China(No.KKSY201403006) the National Natural Science Foundation of China(No.61564005)
关键词 anisotropic properties thermodynamic properties the quasi-harmonic Debye model BCN anisotropic properties thermodynamic properties the quasi-harmonic Debye model BCN
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