Carbon transport in diamond anvil cells
- Bayerisches Geoinstitut
High-pressure-induced carbon transport from diamond anvils into the pressure chamber of diamond anvil cells (DACs) was studied by micro-Raman spectroscopy. Depending on experimental conditions (temperature and pressure), various carbon phases (amorphous carbon, diamond, microcrystalline or nanocrystalline graphite) were detected in the originally carbon-free samples. Temperature-induced growth of a graphite phase at the sample/diamond interface was observed in situ at high pressure in an externally heated DAC. In laser-heated samples inside the pressure-transmitting medium, at pressures above 6 GPa there was transport of carbon from the diamond culet surface into the heated part of the sample. These observations suggest that account should be taken of possible carbon diffusion in high-pressure research with DACs, such as high-pressure melting, element partitioning, phase transformations, chemical reactions, and electrical resistivity.
- Research Organization:
- Advanced Photon Source (APS), Argonne National Laboratory (ANL), Argonne, IL (US)
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 1008780
- Journal Information:
- High Temp.-High Press., Journal Name: High Temp.-High Press. Journal Issue: (2) ; 2003 Vol. 35/6; ISSN HTHPAK; ISSN 0018-1544
- Country of Publication:
- United States
- Language:
- ENGLISH
Similar Records
Pressure, stress, and strain distribution in the double-stage diamond anvil cell
Raman Shift of Stressed Diamond Anvils: Pressure Calibration and Culet Geometry Dependence