Phys. Rev. Lett. 92, 215505 (2004) [4 pages]Exceptional Ideal Strength of Carbon ClathratesSee Also: Erratum Received 4 December 2003; published 28 May 2004 We study by means of ab initio calculations the ideal tensile and shear strengths of the C-46 clathrate phase. While its bulk modulus and elastic constants are smaller than in diamond, its strength is found to be in all directions larger than the critical stresses associated with the diamond {111} planes of easy slip. This can be related to the frustration by the clathrate cage structure of the diamond to graphite instability under hydrostatic stress conditions. The criteria for designing strong materials are discussed. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.92.215505
DOI:
10.1103/PhysRevLett.92.215505
PACS:
61.48.+c, 62.20.–x, 71.15.Mb, 81.05.Tp
See AlsoErratum: X. Blase, Philippe Gillet, A. San Miguel, and P. Mélinon, Erratum: Exceptional Ideal Strength of Carbon Clathrates [Phys. Rev. Lett. 92, 215505 (2004)], Phys. Rev. Lett. 93, 239901 (2004). |
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