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Acoustical and elastic properties of transition metal nitrides

机译:过渡金属氮化物的声学和弹性性质

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Elastic moduli of transition metal nitrides, TiN, ZrN and HfN, have been evaluated using electrostatic and Born repulsive potentials. Acoustical dissipation due to phonon-phonon (p-p) interaction, thermoelastic mechanism and dislocation damping due to screw and edge dislocations has been evaluated in the temperature range 50-500 K along the three crystallographic directions of propagation, viz. [100], [110] and [111] for longitudinal and shear modes. Gruneisen numbers, acoustic coupling constants and their ratios have been evaluated for the longitudinal and shear waves. Results are in good agreement with available data. (C) 2008 Elsevier B.V. All rights reserved.
机译:过渡金属氮化物的弹性模量TiN,ZrN和HfN已使用静电势和Born排斥势进行了评估。声子-声子(p-p)相互作用,热弹性机理以及由于螺钉和边缘位错引起的位错阻尼的声耗已在温度范围50-500 K沿三个晶体学传播方向进行了评估。 [100],[110]和[111]用于纵向和剪切模式。对于纵向波和剪切波,已经评估了格鲁尼森数,声耦合常数及其比率。结果与可用数据高度吻合。 (C)2008 Elsevier B.V.保留所有权利。

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