Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: equation of state (EOS)

Sortuj według:

Ogranicz wyniki do:

Carbon equation of state at high pressure: the role of the radiative transport in the impedance mismatch diagnostics

Aliverdiev A. A., Batani D., Dezulian R., Vinci T.

Nukleonika

2011

Vol. 56, No. 2

165-169

A series of numerical simulation was performed on the application of the impedance mismatch technique to the experimental study of the equation of state (EOS) of porous carbon. Our conclusion is that this technique is useful for such a study up to laser intensities of the order of 1014 W/cm2 (in second or third harmonic of the Nd-laser). However, the inclusion of the radiation transport is important for the correct description of the shock propagation and can affect the results.

Pressure Induced Phase Transitions and EOS Derived for Laves Phase Deuterides ErFe2Dx (x = 1.35, 1.9 and 3.4)

Sugiura H., Filipek S. M., Paul-Boncour V., Marchuk I.

Polish Journal of Chemistry

2008

Vol. 82, nr 10

1959-1972

The energy dispersive X-ray diffraction patterns of ErFe2Dx deuterides [where x = 1.35 (alfa1 phase), x = 1.9 (alfa2 phase) and x = 3.4 (beta phase)] have been measured under pressure up to 31 GPa. Compression curves and equation of state (EOS) parameters were determined us ing ex per i men tal data. ErFe2D1.35 and ErFe2D1.9 de com posed into phases with low (alfa1 ,, alfa 2 ,) and high (alfa1 ,, alfa 2 ,,) deuterium concentrations around 8 GPa. As the pressure was raised above 8 GPa, the D con cen tra tion in the alfa1 ,, alfa 2 , phases re mained close to about x = 0.2 whereas in the alfa1 " alfa 2 ,, phases it in creased from x = 2.1 to a max i mum of x = 4.6 at about 20 GPa. This was accompanied with a progres sive distortion of the alfa1 ,, alfa 2 ,, phases from a cubic to wards an orthorhombic structure. This decomposi tion process occurs with a large hysteresis effect between loading and unloading cycles. A similar decomposition into beta , and beta ,, phases seem ingly oc curs also for ErFe2D3.4 at 11 GPa being accompanied with a change of initial rhombohedral (R3m) symmetry to another one. The D content in this new beta" phase (x ~4.6) be comes close to that of orthorhombic ErFe2H5. These processes have character of spinodal decomposition and are related to a lowering of its critical temperature upon applied pressure.