Shock-compression freezing and melting of water and ice

Schroeder, R.C.; McMaster, W.H.

doi:10.1063/1.1662618

Cited by 20 publications

(12 citation statements)

References 4 publications

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“…Extrapolating relation (6) up to the intersection with the melting curve of ice VII, we obtain point F with coordinates T = 661 K and P = 14.2 GPa. These values are close to the parameters T = 650 K and P = 13 GPa of the "freezing" point (the term of Schroeder and MacMaster [16]) of shock-compressed water. The temperatures studied in [18,20], on the one hand, are fairly high, and, on the other hand, are much lower than those at which thermal excitation of electrons starts.…”

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confidence: 76%

“…In this region the mass portion of ice VII increases from 0.8 at the lowest point to 27% at the highest point. The existence of a solid phase in shock-compressed water in the above pressure range was substantiated in [1][2][3] by the known data of other authors who studied properties of shock-compressed water such as viscosity [14], compressibility [15], and freezing [16]. 'However, the details of transition between three sections of the…”

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confidence: 96%

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Phase transformation of water under shock compression

Rybakov¹

1996

J Appl Mech Tech Phys

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The authors of [1][2][3] established that there is transformation of water into a solid phase (ice VII) under shock compression. It was shown that the shock adiabat of water splits into three separate parts (Figs. 1 and 2). In particular, in the coordinates wave velocity D vs. mass velocity u, these parts are rectilinear sections ( Fig. 1) with their values of the coefficients Co and X in the equation(1) The lower 1 and upper 3 sections are interpreted as corresponding to the liquid phase, and the intermediate 2 as corresponding to a mixture of the liquid phase and ice VII. To estimate temperatures two types of equation of state are used: the Mie--Gruneisen equation and the Zamyshlyayev-Menzhulin interpolation equation [4]. In the Mie--Gruneisen equationthe following expressions derived in [5] are used for the cold constituent of both the pressure Pc and the internal energy EcHere P is the pressure; E is the internal energy; T is the temperature; Cv is the specific heat; F is the Gruneisen parameter; p is the density; Ap = p -P0; the subscript 0 refers to the initial state under normal conditions; subscript c to cold constituents, and T to thermal constituents. The convenience of expressions (3) is that they contain the coefficients Co and A entering into linear relation (1) between the wave and mass velocities. The latter are presented in tables for a large number of materials [6,7], or can be calculated following the rules in [8,9]. The shock adiabat of ice-VII is obtained by processing of the experimental results of [10] on the isothermal compressibility of ice VII (T = 298 K and P = 3-8 GPa). The data of [10] are described by the Mie--Gruneisen equation with the cold constituent in the form of (3). As a result, the coefficients in linear relation (1) between the kinematic parameters of ice VII were evaluated as C0vll = 3.067 km/sec and A = 1.968, and the initial density of ice VII P0vII = 1.5198 9 10 a kg/m 3. It should be noted that this value is close to the density of ice VII p = 1.5-103 kg/m 3 given by Eisenberg and Kauzman [11] without specifying other parameters of state. Olinger and Halleck [10] obtained the value V0 = 1/po = (0.696-0.731)-10 -3 ma/kg and called it the ambient specific volume.Further the mass fractions of the components (Fig. 3) are evaluated from known shock adiabats of both the mixture at section 2 and its components using the rule of additivity proved experimentally in [12,13]. It is found that the shock adiabat of water in the temperature-pressure plane intersects twice the curve of liquid-ice VII phase equilibrium and is in the region of ice VII in the pressure range from 2.86 to 10.1 GPa. In this region the mass portion of ice VII increases from 0.8 at the lowest point to 27% at the highest point. The existence of a solid phase in shock-compressed water in the above pressure range was substantiated in [1][2][3] by the known data of other authors who studied properties of shock-compressed water such as viscosity [14], compressibility [15], and freezing [16].'However, the details o...

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supporting

confidence: 76%

mentioning

confidence: 96%

Phase transformation of water under shock compression

Rybakov¹

1996

J Appl Mech Tech Phys

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“…Even in the first measurements [21,22], it was found that the shock adiabatic curve of water from the initial state at T 0 = 20°C in the D-U coordinates in the pressure range of ~12-13 GPa had an inflection which was attributed to the crossing of the shock adiabatic curve by the melting curve of ice. Walsh and Rice [20] attributed this effect to analogy with melting of ice I on the shock adiabatic curve from the initial state at T 0 = -10 °C.…”

Section: Shock Adiabatic Curve Of Watermentioning

confidence: 99%

“…However, no corresponding inflection was observed on the D(U) curves. Therefore, these dependences were represented in [22,[27][28][29][30] by two linear segments of different slopes, the position of whose inflections corresponded to their intersection.…”

Section: Shock Adiabatic Curve Of Watermentioning

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Measurements of the viscosity of water under shock compression

Минеев

Funtikov

2005

High Temp

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The results of measurements of the shear viscosity of shock-loaded water, obtained by the method of decay of perturbations on a corrugated shock front suggested by Sakharov et al. [1], are treated in the light of new data on the phase diagram of water. The experimental data on viscosity in the pressure range from 4 to 25 GPa are compared to the results of measurements by other methods. The high values of viscosity at high pressures are attributed to the formation a water-ice VII mixture under shock compression of water.

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