Physics
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011georl..3809302s&link_type=abstract
Geophysical Research Letters, Volume 38, Issue 9, CiteID L09302
Physics
3
Mineral Physics: High-Pressure Behavior, Mineral Physics: X-Ray, Neutron, And Electron Spectroscopy And Diffraction, Seismology: Core (1212, 1213, 8124), Geochemistry: Composition Of The Core
Scientific paper
The phase relations of Fe, Fe90Ni10 and Fe87.9Ni4.4Si7.7 were investigated up to 273(6) GPa and 4490(560) K, 250(19) GPa and 2730(110) K and 304(3) GPa and 2780(210) K, respectively, and the hexagonal close-packed structure was found to be stable in all of these compounds under the pressure and temperature conditions studied. We did not observe other phases such as a body-centered cubic structure. The axial ratio (c/a) of Fe87.9Ni4.4Si7.7 at 300 GPa showed an almost constant value of 1.593-1.596 against temperature. The weak temperature dependency of the axial ratio of hcp-Fe-Ni-Si alloy indicates that the c-axis is still harder than the a-axis at high temperature condition. Therefore the alignment of hcp-Fe-Ni-Si alloy with the c-axis parallel to the Earth's rotation axis could account for the observation of the seismic wave anisotropy of the inner core.
Hirao Naohisa
Ohishi Yasuo
Ohtani Eiji
Sakai Takeshi
No associations
LandOfFree
Stability field of the hcp-structure for Fe, Fe-Ni, and Fe-Ni-Si alloys up to 3 Mbar does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Stability field of the hcp-structure for Fe, Fe-Ni, and Fe-Ni-Si alloys up to 3 Mbar, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stability field of the hcp-structure for Fe, Fe-Ni, and Fe-Ni-Si alloys up to 3 Mbar will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-926700