Thermodynamics of freezing and melting of /sup 4/He in Vycor

Journal Article · Wed Dec 31 23:00:00 EST 1986 · J. Low Temp. Phys.; (United States)

DOI:https://doi.org/10.1007/BF00681469· OSTI ID:6060286

Adams, E D; Tang, Y H; Uhlig, K; Haas, G E

Recently it was discovered that helium in confined geometries remains a liquid at pressures considerably above bulk melting. By combining a special technique for measuring pressures in small pores with thermal measurements, the phase diagram has been obtained for freezing and melting of /sup 4/He in Vycor glass. The measurements cover the range of temperature from 0.8 to 2.5 K and extend to pressures of 6.0 MPa. At 1 K, /sup 4/He is found to remain a liquid up to 4.2 MPa. The change in volume and latent heat on freezing are found and a complete analysis is given of the thermodynamics of freezing of helium in the Vycor.

• Research Organization: Univ. of Florida, Gainesville
• OSTI ID: 6060286
• Journal Information: J. Low Temp. Phys.; (United States), Journal Name: J. Low Temp. Phys.; (United States) Vol. 66:1-2; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602 -- Other Materials-- Structure & Phase Studies
640450* -- Fluid Physics-- Superfluidity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DIAGRAMS
DROPLETS
ENERGY
ENTHALPY
ENTROPY
EVEN-EVEN NUCLEI
FREE ENTHALPY
FREEZING
GLASS
HELIUM 4
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
MATERIALS TESTING
MATHEMATICAL MODELS
MEDIUM PRESSURE
MELTING
MELTING POINTS
NUCLEATION
NUCLEI
PARTICLES
PHASE DIAGRAMS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
POROSITY
PRESSURE DEPENDENCE
STABLE ISOTOPES
TEST FACILITIES
TESTING
THERMAL ANALYSIS
THERMODYNAMIC PROPERTIES
THERMODYNAMICS
TRANSITION HEAT
TRANSITION TEMPERATURE