Journal ArticleDOI
Experimental Determination of the P–T Melting Curve of Argon
TLDR
In this paper, the melting temperature is measured with a platinum resistance thermometer mounted on the vessel, while the corresponding melting pressure is measured using a high-precision manganin resistance pressure gauge, which is connected to the pressure system.Abstract:
Techniques for the precise measurement of the P–T melting curves of gases at pressures up to about 12 kbar have been developed. In the method used, a pressure vessel is maintained at a temperature constant to within ± 0.002°K. The pressure in the system is adjusted by manipulation of the pressure generating intensifier until solid–fluid coexistence is obtained within the vessel. The melting temperature is then measured with a platinum resistance thermometer mounted on the vessel, while the corresponding melting pressure is measured with a high‐precision manganin resistance pressure gauge, which is connected to the pressure system. This method has been employed in making extensive P–T melting curve measurements in argon at pressures ranging from 0.58–11.41 kbar and temperatures from 97.8–272.9°K. The estimated precision in the results is ± 0.4 bar in pressure and ± 0.002°K in temperature. The absolute accuracy of the measurements, especially pressure, may be somewhat less due to uncertainty in the defining...read more
Citations
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Journal ArticleDOI
Free energy of the Lennard-Jones solid
TL;DR: In this article, a simple expression for the absolute Helmholtz free energy of the fcc Lennard-Jones solid from molecular dynamics simulations was determined, which is in very good agreement with the values reported in literature previously.
Journal ArticleDOI
Dynamics at the solid-liquid transition: Experiments at the freezing point
TL;DR: In this article, a review of the properties of the solid state, the liquid state, and interfaces at the freezing point is given, which can be described by laws of corresponding states, so-called melting rules.
Journal ArticleDOI
Freezing and melting properties of the Lennard‐Jones system
TL;DR: In this article, the authors investigate average molecular arrangements that occur with the fluid-solid transition in a classical Lennard-Jones system and show the crystalline order of the solid phase is explicitly shown by the angularly averaged molecular correlation functions which exhibit a behavior not observed in the fluid.
Journal ArticleDOI
Homogeneous nucleation and droplet growth in supersaturated argon vapor: The cryogenic nucleation pulse chamber
TL;DR: A severe failure of the classical nucleation theory, which predicts nucleation rates on the order of 10(-28)-10(-13) cm(-3) s(-1) for the quoted conditions, is indicated.
References
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Journal ArticleDOI
The plastic deformation of polycrystalline aggregates
TL;DR: For a number of metallic polycrystalline aggregates, it was shown experimentally that flow stress at constant strain is related to the grain diameter l by where [sgrave]0 and k are constants as discussed by the authors.
Journal ArticleDOI
Parameters in the Simon Equation Relating Pressure and Melting Temperature
Journal ArticleDOI
Generalized Lindemann Melting Law
TL;DR: In this paper, the Lindemann melting law is generalized by reformulating it in terms of the statistical-mechanical partition function, and a melting curve is calculated for argon, which is in good agreement with experiment.
Journal ArticleDOI
Equation‐of‐State Measurements in Compressed Argon
R. K. Crawford,W. B. Daniels +1 more
TL;DR: In this paper, a weighting technique used in obtaining experimental P-V-T data for argon at high pressures is described, and the entropy and energy of argon are derived from these data.
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