Urtra-Hard Bonds in P-Carbon Stronger than Diamond
-
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.
Article Text
-
-
-
About This Article
Cite this article:
GUO Wen-Feng, WANG Ling-Sheng, LI Zhi-Ping, XIA Mei-Rong, GAO Fa-Ming. Urtra-Hard Bonds in P-Carbon Stronger than Diamond[J]. Chin. Phys. Lett., 2015, 32(9): 096201. DOI: 10.1088/0256-307X/32/9/096201
GUO Wen-Feng, WANG Ling-Sheng, LI Zhi-Ping, XIA Mei-Rong, GAO Fa-Ming. Urtra-Hard Bonds in P-Carbon Stronger than Diamond[J]. Chin. Phys. Lett., 2015, 32(9): 096201. DOI: 10.1088/0256-307X/32/9/096201
|
GUO Wen-Feng, WANG Ling-Sheng, LI Zhi-Ping, XIA Mei-Rong, GAO Fa-Ming. Urtra-Hard Bonds in P-Carbon Stronger than Diamond[J]. Chin. Phys. Lett., 2015, 32(9): 096201. DOI: 10.1088/0256-307X/32/9/096201
GUO Wen-Feng, WANG Ling-Sheng, LI Zhi-Ping, XIA Mei-Rong, GAO Fa-Ming. Urtra-Hard Bonds in P-Carbon Stronger than Diamond[J]. Chin. Phys. Lett., 2015, 32(9): 096201. DOI: 10.1088/0256-307X/32/9/096201
|