Graphite Triple Point and Solidus-Liquidus Interface Experimentally Determined up to 1000 atm

Schoessow, G. J.

doi:10.1103/physrevlett.21.738

Cited by 24 publications

(3 citation statements)

References 2 publications

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“…Interrupting for a moment the historical order of events, we note that, throughout the past century, different experiments located the graphite melting curve at rather different temperatures [66,60,67,68,65,69,70,71,72,73,74,75]. At low pressure, the melting temperature (T m ) was found at values ranging from ∼ 3800 to ∼ 5000 K. Asinovskii et al [76] pointed out the non negligible dependence of graphite T m on the heating rate of the sample.…”

Section: The History Of Carbon Phase Diagrammentioning

confidence: 91%

State-of-the-art models for the phase diagram of carbon and diamond nucleation

et al. 2008

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We review recent developments in the modelling of the phase diagram and the kinetics of crystallization of carbon. In particular, we show that a particular class of bond-order potentials (the so-called LCBOP models) account well for many of the known structural and thermodynamic properties of carbon at high pressures and temperatures. We discuss the LCBOP models in some detail. In addition, we briefly review the "history" of experimental and theoretical studies of the phase behaviour of carbon. Using a well-tested version of the LCBOP model (viz. LCBOPI + ) we address some of the more controversial hypotheses concerning the phase behaviour of carbon, in particular: the suggestion that liquid carbon can exist in two phases separated by a first-order phase transition and the conjecture that diamonds could have formed by homogeneous nucleation in Uranus and Neptune.

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Section: The History Of Carbon Phase Diagrammentioning

confidence: 91%

State-of-the-art models for the phase diagram of carbon and diamond nucleation

et al. 2008

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“…The melting curve has been investigated to 1 kbar by Schoessow [333] and to much higher pressures . at General Electric [89,94] and in Moscow [139][140][141]399].…”

Section: Carbonmentioning

confidence: 99%

Behavior of the Elements at High Pressures

Cannon

1974

Journal of Physical and Chemical Reference Data

253

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Data on polymorphic phase changes and variation of melting temperature of the elements with pressure have been compiled and critically evaluated. Emphasis has been placed on work done at pressures exceeding 1 kbar. Pressure-temperature phase diagrams showing first•order solid•solid phase boundaries and/or melting curves derived from the best available data are given for 58 elements. In• formation on the crystal structures of high•pressure polymorphs is also reviewed. Those elements that exist in the gaseous state at room temperature and pressure are not included.

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“…Therefore, at the present time, the ambiguity in the determination of the parameters of the solid-liquid-vapour triple point of carbon presented in the literature is the most significant problem for describing the route of formation of the liquid phase of carbon (in the phase diagram of the substance) under conditions of pulse laser irradiation. The points (100 atm, 5000 K) [4][5][6][7] and (1 atm, 4000 K) 8,9 in the phase diagram of carbon are presently assigned to the most probable points of the triple point.…”

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confidence: 99%