Melting curve equations at high pressure

被引:85
作者
Kechin, VV [1 ]
机构
[1] Inst High Pressure Phys, Troitsk 142190, Moscow oblast, Russia
关键词
D O I
10.1103/PhysRevB.65.052102
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A number of equations for the melting temperature dependence on pressure, T-m(P), based on the two- and one-phase approaches to melting have been obtained. All melting curves have the form T-m = F(P)D(P), where F(P) is the Simon (rising) melting equation and D(P) is the damping function, which asymptotically slopes down under pressure. This form predicts that each solid phase has a maximum melting temperature at positive or negative pressure. The simplest equation of this form is T-m = T-0(1 + DeltaP/a)(b) exp(-cDeltaP), where DeltaP = P-P-0, P-0 is some reference pressure, and a, b, and c are parameter which are identified in terms of thermodynamic values. All melting curve data obey this equation. This implies that there exist no anomalous melting curves. All melting curves, rising, falling, and flattening, as well as curves with a maximum, are normal insofar as all of them can be described by the unified equation.
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页码:1 / 4
页数:4
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共 59 条
[2]   Molecular dynamics of LiF melting [J].
Belonoshko, AB ;
Ahuja, R ;
Johansson, B .
PHYSICAL REVIEW B, 2000, 61 (18) :11928-11935
[3]   Quasi -: Ab initio molecular dynamic study of Fe melting [J].
Belonoshko, AB ;
Ahuja, R ;
Johansson, B .
PHYSICAL REVIEW LETTERS, 2000, 84 (16) :3638-3641
[4]   Quasi ab initio molecular dynamic study of Cu melting [J].
Belonoshko, AB ;
Ahuja, R ;
Eriksson, O ;
Johansson, B .
PHYSICAL REVIEW B, 2000, 61 (06) :3838-3844
[5]   SYSTEMATICS IN THE MELTING BEHAVIOR OF THE ALKALI-METALS FROM DAC MEASUREMENTS [J].
BOEHLER, R ;
ZHA, CS .
PHYSICA B & C, 1986, 139 (1-3) :233-236
[6]   MELTING AND ADIABATS OF THE ALKALI-METALS AT HIGH COMPRESSIONS [J].
BOEHLER, R ;
YOUNG, DA .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 1984, 61-2 (JAN) :141-146
[7]  
BOGUSLAVSKII YY, 1986, ZH FIZ KHIM+, V60, P2878
[8]   Thermodynamics of crystals and melting [J].
Born, M .
JOURNAL OF CHEMICAL PHYSICS, 1939, 7 (08) :591-603
[9]   CORRECTION [J].
BOYER, LL .
PHYSICAL REVIEW LETTERS, 1981, 46 (17) :1172-1172
[10]   NATURE OF MELTING AND SUPERIONICITY IN ALKALI AND ALKALINE-EARTH HALIDES [J].
BOYER, LL .
PHYSICAL REVIEW LETTERS, 1980, 45 (23) :1858-1862