Equilibrium pressure measurements in the beta region of palladium protide and palladium deuteride

Technical Report · Wed Mar 01 04:00:00 EST 1989

OSTI ID:6363109

Carstens, D H.W.; David, W R

We have measured the pressure-composition isotherms of the palladium-deuterium and palladium-protium systems in the beta region of both and the plateau region of the protide. For these two systems, data were measured at pressures up to about 3.5 MPa (500 psi) and at temperatures from 173 to 473 K. This study extends to a greater pressure and temperature regime the work on palladium hydrides reported previously by other authors. We also report results of an empirical analytical fit to the data for these two isotope systems. For completeness, we have applied our analysis to previously reported data for the tritide. The data were fit to an equation of the form P = exp/A + 2ln(R/(1 - R))-(B - CR)/T/ + exp(D + E/T), where R is the hydrogen-to-metal atomic ratio, P is the pressure, and T is the temperature. A, B, C, D, and E are empirically determined parameters and differ for absorbing and desorbing systems of each isotope. This equation gives a good fit to the data in the beta region of the absorption curves but a poorer fit in the alpha plus beta (plateau) region. 15 refs., 6 figs.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6363109
• Report Number(s): LA-11456-MS; ON: DE89008309
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
360104 -- Metals & Alloys-- Physical Properties
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
DEUTERIUM
DIFFUSION
DISTRIBUTION
EQUILIBRIUM
HIGH TEMPERATURE
HYDRIDES
HYDROGEN 1
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
MEDIUM PRESSURE
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PALLADIUM COMPOUNDS
PALLADIUM HYDRIDES
RADIOISOTOPES
STABLE ISOTOPES
TRANSITION ELEMENT COMPOUNDS
TRITIUM
YEARS LIVING RADIOISOTOPES