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Urtra-Hard Bonds in P -Carbon Stronger than Diamond
- Source :
- Chinese Physics Letters. 32:096201
- Publication Year :
- 2015
- Publisher :
- IOP Publishing, 2015.
-
Abstract
- The hardness and ideal strength of P-carbon, i.e., a new carbon phase for the cold-compressed carbon with an orthogonal structure recently proposed and named as P-carbon, are investigated by means of first-principles calculations. The strength calculations reveal that the failure mode in P-carbon is dominated by the tensile type. The ideal tensile strength of P-carbon is calculated to be 76.7 GPa in the [001] direction, which is higher than that of the previously known most stable Z-carbon, of 71.4 GPa. Meanwhile, the theoretical Vickers hardness of P-carbon is estimated as 89 GPa, which is comparable with that of diamond. Especially, two types of bonds in P-carbon with hardness values of 114 GPa and 105 GPa are significantly stronger than those of diamond. The results provide insight into exploration of the ultra-hard P-carbon for potentially technological applications.
Details
- ISSN :
- 17413540 and 0256307X
- Volume :
- 32
- Database :
- OpenAIRE
- Journal :
- Chinese Physics Letters
- Accession number :
- edsair.doi...........26dfdb6fca50a04e912dcd2b55af71b9
- Full Text :
- https://doi.org/10.1088/0256-307x/32/9/096201