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2004

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Viscosity measurements on metal melts at high pressure and viscosity calculations for the earth’s core

 a,  b
a Institute for High Energy Densities, Associated Institute for High Temperatures, Russian Academy of Sciences, Izhorskaya 13/19, Moscow, 127412, Russian Federation
b Institute of Thermophysics of Extreme States, Joint Institute for High Temperatures, Russian Academy of Sciences, Izhorskaya 13/19, Moscow, 125412, Russian Federation

A review is given of experimental and calculated data on the viscosity of iron-based melts on the melting curve. The interest in these data originates in the division of opinion on whether viscosity increases rather moderately or considerably in the high-pressure range. This disagreement is especially pronounced in the interpretation of the values of molten iron and its compounds in the environment of the earth’s outer core. The conclusion on a substantial rise in viscosity mostly follows from the universal law, proposed by Brazhkin and Lyapin [1], of viscosity changing along the metal melting curve in the high-pressure range. The review analyzes available experimental and computational data, including the most recent ones. Data on viscosity of metals under shock wave compression in the megabar pressure range are also discussed. It is shown that data on viscosity of metal melts point to a small increase of viscosity on the melting curve. Specifics are discussed of the phase diagram of iron made more complex by the presence of several phase transitions and by the uncertainty in the position of the melting curve in the high-pressure range. Inaccuracies that arise in extrapolating the results of viscosity measurements to the pressure range corresponding to the earth’s core environment are pointed out.

Fulltext pdf (289 KB)
Fulltext is also available at DOI: 10.1070/PU2004v047n07ABEH001746
PACS: 62.50.+p, 66.20.+d, 81.30.Bx, 91.35.−x (all)
DOI: 10.1070/PU2004v047n07ABEH001746
URL: https://ufn.ru/en/articles/2004/7/b/
000225027900002
2004PhyU...47..671M
Citation: Mineev V N, Funtikov A I "Viscosity measurements on metal melts at high pressure and viscosity calculations for the earth's core" Phys. Usp. 47 671–686 (2004)
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Оригинал: Минеев В Н, Фунтиков А И «Об измерении вязкости расплавов металлов при высоких давлениях и расчетах вязкости применительно к ядру Земли» УФН 174 727–742 (2004); DOI: 10.3367/UFNr.0174.200407b.0727

References (121) Cited by (32) Similar articles (20) ↓

  1. V.V. Brazhkin, A.G. Lyapin “Universal viscosity growth in metallic melts at megabar pressures: the vitreous state of the Earth’s inner core43 493–508 (2000)
  2. D.K. Belashchenko “Computer simulation of liquid metals56 1176–1216 (2013)
  3. G.I. Kanel, V.E. Fortov, S.V. Razorenov “Shock waves in condensed-state physics50 771–791 (2007)
  4. D.K. Belashchenko “Does the embedded atom model have predictive power?63 1161–1187 (2020)
  5. S.M. Stishov “The thermodynamics of melting of simple substances18 625–643 (1975)
  6. S.B. Kormer “Optical study of the characteristics of shock-compressed condensed dielectrics11 229–254 (1968)
  7. L.V. Al’tshuler “Use of shock waves in high-pressure physics8 52–91 (1965)
  8. E.N. Avrorin, B.K. Vodolaga et alIntense shock waves and extreme states of matter36 (5) 337–364 (1993)
  9. V.V. Evdokimova “Some relationships governing the P-T phase diagrams and polymorphic transformations of elements under high pressures9 54–72 (1966)
  10. V.N. Mineev, A.G. Ivanov “Electromotive force produced by shock compression of a substance19 400–419 (1976)
  11. V.M. Svistunov, M.A. Belogolovskii, O.I. Chernyak “Tunnel investigations of metals at high pressures30 1–22 (1987)
  12. A.Z. Dolginov “Origin of the magnetic fields of the earth and celestial bodies30 475–493 (1987)
  13. I.L. Fabelinskii “Macroscopic and molecular shear viscosity40 689–700 (1997)
  14. N.I. Kulikov, V.V. Tugushev “Spin-density waves and itinerant antiferromagnetism in metals27 954–976 (1984)
  15. L.V. Al’tshuler, A.A. Bakanova “Electronic structure and compressibility of metals at high pressures11 678–689 (1969)
  16. S.M. Stishov “Melting at high pressures11 816–830 (1969)
  17. A.Yu. Potekhin “The physics of neutron stars53 1235–1256 (2010)
  18. R.F. Trunin “Shock compression of condensed materials (laboratory studies)44 371–396 (2001)
  19. A.I. Voropinov, G.M. Gandel’man, V.G. Podval’nyi “Electronic energy spectra and the equation of state of solids at high pressures and temperatures13 56–72 (1970)
  20. N.B. Brandt, N.I. Ginzburg “Effect of high pressure on the superconducting properties of metals8 202–223 (1965)

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