Liquid-Liquid Phase Transformation in Carbon
Open Access
- 7 June 1999
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 82 (23) , 4659-4662
- https://doi.org/10.1103/physrevlett.82.4659
Abstract
A first order phase transition is found in liquid carbon using atomistic simulation methods and Brenner's bond order potential. The phase line is terminated by a critical point at 8801 K and 10.56 GPa and by a triple point on the graphite melting line at 5133 K and 1.88 GPa. The phase change is associated with density and structural changes. The low-density liquid is predominantly bonded with little character. The high-density liquid is mostly bonded with little character. This is the first nonempirical evidence of a liquid-liquid transition between thermodynamically stable fluids.
Keywords
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