Project Details
Description
Experimental and theoretical calculations recently indicated that TiO2 could have a series of high-pressure phases with a hardness possibly approaching that of a diamond. The high-pressure, high-temperature phase equilibria have been studied [1] with special emphasis on the rutile alpha-PbO2 type phases. It is found that the phase boundary, when plotted in a pressure - temperature diagram, changes from negative to positive slope with increasing temperature at about 6 GPa and 850 C. For nanophase material, the phase boundary is shifted towards lower pressure. The room-temperature bulk moduli are 210, 258 and 290 GPa for rutile, the alpha-PbO2 type phase and the baddeleyite type phase, respectively.
Status | Finished |
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Effective start/end date | 01/01/1998 → 31/12/2000 |
Collaborative partners
- Technical University of Denmark (lead)
- University of Copenhagen (Project partner)
Funding
- Unknown
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