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Study of laser heated iron using third generation synchrotron X-ray radiation facility with imaging plate at high pressures |
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| Authors: | L S Dubrovinsky P Lazor S K Saxena P Häggkvist H-P Weber T Le Bihan D Hausermann |
| Institution: | (1) Institute of Earth Sciences, Uppsala University, S-752 36 Uppsala, Sweden Fax: +46 18 4712591 e-mail: leonid.dubrovinsky@geo.uu.se, SE;(2) Section de Physique, Universite de Lausanne, CH-1015 Lausanne, Switzerland, CH;(3) European Synchrotron Radiation Facility, BP 220, Av des Martyrs, F-38043 Grenoble, France, FR |
| Abstract: | Iron pressurized to 60 gigapascal (GPa) was heated with laser up to temperatures of over 2200 K. The structural changes were determined in-situ using third generation synchrotron X-ray source; the changes were recorded on an imaging plate with a monochromatic beam. The results strongly support the existence of a phase transformation of the hexagonal close-packed (hcp) structure to the new polymorph (β-phase of iron) at high pressure and temperature. We interpret the X-ray data as belonging to the double hexagonal close-packed (dhcp) structure distorted by stress due to laser heating. Received: 2 February 1998 / Accepted: 23 August 1998 |
| Keywords: | Iron High pressure and temperature Phase transition Stress |
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