学術雑誌論文

学術雑誌論文

text

Applied Physics Letters. 2013, 102(24), p. 241909-1-241909-5

Elastic constants of cubic and wurtzite boron nitrides

American Institute of Physics

英語

text

2013-06-20

https://doi.org/10.1063/1.4811789

Nagakubo A., Ogi H., Sumiya H., et al. Elastic constants of cubic and wurtzite boron nitrides. Applied Physics Letters, 102(24), 241909 (2013) https://doi.org/10.1063/1.4811789.

We synthesized pure polycrystalline cubic boron nitride (cBN) and wurtzite boron nitride (wBN) by the direct conversion method from hexagonal boron nitride, and measured their longitudinal-wave elastic constants CL between 20 and 300 K using picosecond ultrasound spectroscopy. Their room-temperature values are 945 ± 3 GPa and 930 ± 18 GPa for cBN and wBN, respectively. The shear modulus G of cBN was also determined by combining resonance ultrasound spectroscopy and micromechanics calculation as G = 410 GPa. We performed ab-initio calculations and confirmed that the generalized gradient approximation potential fails to yield correct elastic constants, which indicated the necessity of a hybrid-functional method. © 2013 AIP Publishing LLC.

Copyright 2013 AIP Publishing LLC. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Applied Physics Letters, 102(24), 241909, 2013 and may be found at https://doi.org/10.1063/1.4811789.

83925

Elastic constants of cubic and wurtzite boron nitrides

American Institute of Physics

英語

2013-06-20

Applied Physics Letters

102

24

241909-1

241909-5

https://doi.org/10.1063/1.4811789

https://hdl.handle.net/11094/83925