Accession Number : AD0264353

Title :   THERMODYNAMIC PROPERTIES OF COPPER-PALLADIUM ALLOYS

Corporate Author : MATERIALS RESEARCH LAB UNIV OF CALIF BERKELEY

Personal Author(s) : GUADAGNO,JAMES R. ; ORR,RAYMOND L. ; HULTGREN,RALPH

Report Date : 01 SEP 1961

Pagination or Media Count : 1

Abstract : The heats of formation of 6 Cu-Pd alloys were measured at 1000 K in a liquid Sn solution calorimeter. The heat of formation vs composition curve shows a maximum exothermic value between 40 and 45 at-% Pd, resembling the curve previously obtained for the Ag-Pd system and tending to verify Pauling's theory on the nature of atomic bonding. The data were combined with available free energy data to determine entropies of formation. The heats of solution obtained for Cu and Pd in dilute solution in liquid Sn at 775 K were + 2900 and - 25240 cal/g-atom, respectively. The alloys were analyzed chemically and lattice constants were determined from x-ray diffraction data. (Author)

Descriptors :   *COPPER, *COPPER ALLOYS, *PALLADIUM, *PALLADIUM ALLOYS, ALLOYS, CALORIMETERS, CHEMICAL ANALYSIS, CRYSTAL LATTICES, CRYSTAL STRUCTURE, HEAT OF FORMATION, HEAT OF SOLUTION, LIQUID METALS, METALS, THERMODYNAMICS, TIN, TRANSITION METALS, X RAY DIFFRACTION

Distribution Statement : APPROVED FOR PUBLIC RELEASE