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Research Article | Open Access

Mechanically induced stiffening, thermally driven softening, and brittle nature of SiC

School of Physics, Vigyan Bhavan, Devi Ahilya University, Khandwa Road Campus, Indore 452001, India
Department of Physics, M. B. Khalsa College, Indore 452002, India
Laboratoire de Physique Quantique et de Modélisation Mathématique (LPQ3M), Département de Technologie, Université de Mascara, Mascara 29000, Algeria
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An effective interionic potential calculation with long range Coulomb, charge transfer interaction, covalency effect, short range overlap repulsion extended, van der Waals interaction, and zero point energy effect is implemented to investigate the pressure dependent structural phase transition (ZnS-type (B3) to NaCl-type (B1) structure), and mechanical, elastic, and thermodynamic properties of silicon carbide (SiC). Both charge transfer interaction and covalency effect are important in revealing the pressure induced structural stability, Cauchy discrepancy, anisotropy factor, melting temperature, shear modulus, Young’s modulus, and Grüneisen parameter. We also present the results for the temperature dependent behaviors of normalized volume, hardness, heat capacity, and thermal expansion coefficient. SiC is mechanically stiffened and thermally softened as inferred from pressure (temperature) dependent elastic constant’s behavior. The Pugh’s ratio ϕ=BT/GH, the Poisson’s ratio ν, and the Cauchy’s pressure C12C44 for SiC ceramic confirm its brittle nature.


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Journal of Advanced Ceramics
Pages 13-34
Cite this article:
VARSHNEY D, SHRIYA S, JAIN S, et al. Mechanically induced stiffening, thermally driven softening, and brittle nature of SiC. Journal of Advanced Ceramics, 2016, 5(1): 13-34.








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Received: 16 April 2015
Revised: 28 July 2015
Accepted: 12 August 2015
Published: 31 March 2016
© The author(s) 2016

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