The pressure-temperature phase and transformation diagram for carbon; updated through 1994

@article{Bundy1996ThePP,
  title={The pressure-temperature phase and transformation diagram for carbon; updated through 1994},
  author={Francis Pettit Bundy and William A. Bassett and Maura S. Weathers and Russell J. Hemley and Hokwang Mao and Alexander F. Goncharov},
  journal={Carbon},
  year={1996},
  volume={34},
  pages={141-153}
}
Abstract In recent years, important advances in our understanding of the pressure-temperature phase and transformation diagram for carbon have occurred as a result of developments in both experimental and theoretical techniques. Graphite, diamond, liquid and vapor remain the major thermodynamically stable forms of carbon. However, due to the high activation energies for solid-state transformations and the specific effects of reaction paths, other metastable forms and a wide spectrum of complex… Expand

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References

SHOWING 1-10 OF 56 REFERENCES
The P, T phase and reaction diagram for elemental carbon, 1979
A brief history of the many investigations of the pressure/temperature phase diagrams of elemental carbon is given. The strengths and weaknesses of the various proposed diagrams are discussed, andExpand
Theoretical description of the graphite, diamond, and liquid phases of carbon
A three-phase equation-of-state model, to be used in high-pressure high-density simulations of systems containing carbon, is described for the system graphite-diamond-liquid. The solid phases areExpand
A study of phase transformation between diamond and graphite in P-T diagram of carbon
Abstract The phase transformation between diamond and graphite has been studied by calculating the transiting probability of the carbon atoms over a potential barrier. For the first time, theExpand
Diamond‐Graphite Equilibrium Line from Growth and Graphitization of Diamond
Diamond growth occurs at high temperatures and pressures in the presence of certain molten metals which serve as solvent catalysts. The zones of pressure and temperature in which diamond growthExpand
Phase Diagrams of Silicon and Germanium to 200 kbar, 1000°C
The phase diagrams of Si and Ge have been investigated experimentally over a P, T range of about 200 kbar and 1000°C by observing electrical resistance behavior. For Si the boundary between theExpand
Direct transitions among the allotropic forms of boron nitride at high pressures and temperatures
The direct transition behavior among the graphitic (hBN), wurtzitic (wBN), and zincblende (zBN) crystal forms of boron nitride is investigated as a function of temperature for pressures up to 130Expand
Direct Conversion of Graphite to Diamond in Static Pressure Apparatus.
TLDR
At pressures above about 125 kbar and temperatures in the 3000°K range it is found that graphite spontaneously collapses completely to polycrystalline diamond which may be retrieved quantitatively. Expand
The graphite-to-diamond transformation
Abstract An orbital model for a solid state transformation, the graphite-to-diamond high-pressure reaction, is presented. Using solid state Walsh diagrams we relate this transformation to chemicalExpand
Crushing C60 to diamond at room temperature
C6o MOLECULES are extremely stable, withstanding hydrostatic pressures of up to at least 20 GPa (ref. 1). It has been proposed that at high pressures they could form a solid harder than diamond2. OnExpand
Melting of Diamond at High Pressure
TLDR
The results indicate an increase of the diamond melting temperature with pressure, which is opposite to the behavior of silicon and germanium, contrary to long-held assumptions, but agrees with recent experiments, and has important implications for geology and astrophysics. Expand
...
1
2
3
4
5
...