Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 575, Issue -, Pages 137-144Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2013.04.051
Keywords
First-principles; Deformation modes; Anisotropy
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Funding
- National Natural Science Foundation of China [11102169, 51101130, 51171156]
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This paper studies the deformation modes and anisotropy of the IVB transition metal nitrides TiN, ZrN, and HfN using the plane-wave density functional theory. The values of elastic modulus and hardness of the TiN, ZrN, and HfN are calculated and analyzed in detail. This result suggests typical elastic anisotropy, which increases in the order of TiN -> ZrN -> HfN. This phenomenon results in inevitable lattice distortion and microcracks. The minimum value of thermal conductivity of the polycrystalline system decreases in the order of TiN -> ZrN -> HfN. The thermal conductivity of single crystals in each crystal orientation presents a nearly anisotropic thermodynamic property. (c) 2013 Elsevier B.V. All rights reserved.
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