Method for the prediction of the hydriding thermodynamics of ternary PD-based alloys.

Conference · Mon Jan 01 04:00:00 EST 2001

OSTI ID:975309

Teter, D F ^[1]; Mauro, M E ^[2]

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1. David F.
2. Michael Ernest

A method has been developed to calculate the hydriding thermodynamics of ternary Pd-X-Y systems, where X and Y are substitutional alloying elements, by using the properties of the binary Pd-X and Pd-Y systems. Experimental data was collected on the Pd-Rh-Co system to test the validity of this method. Hydrogen pressure-composition isotherms of several binary Pd-Rh and Pd-Co alloys and Pd-Rh-Co ternary alloys were measured to determine the thermodynamics of hydrogen absorption, hydride formation and decomposition, and hydrogen capacity. Good agreement between the calculated and measured values for the ternary Pd-Rh-Co system, in the dilute alloying regime (< 10 at.% total alloying additions), was obtained using our method. Examining literature results on other ternary Pd-X-Y systems checked the universality of this method. Again, the method succeeds in predicting the hydriding thermodynamics for both lattice contracted and lattice expanded alloy systems, Pd-Ni-Rh and Pd-Ag-Y respectively.

• Research Organization: Los Alamos National Laboratory
• Sponsoring Organization: DOE
• OSTI ID: 975309
• Report Number(s): LA-UR-01-2325
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
36 MATERIALS SCIENCE
ABSORPTION
ALLOY SYSTEMS
ALLOYS
CAPACITY
DATA
FORECASTING
HYDRIDES
HYDROGEN
ISOTHERMS
THERMODYNAMICS