Accession Number : AD0831129

Title :   THERMODYNAMIC PROPERTIES OF LIQUID MG-GA, MG-IN AND MG-TL SYSTEMS,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH

Personal Author(s) : Slaby, H.

Report Date : 29 AUG 1967

Pagination or Media Count : 9

Abstract : A method of measuring the emf of electrolytes is proposed. The measurements were carried out in the 673 - 920K temperature range: the emf values were calculated from the linear dependence of emf on temperature. (1) The liquid alloys: Mg-Zn, Mg-Cd, Mg-Ga, Mg-In, Mg-Sb, Mg-Al, although differing in their thermodynamic characteristics are shown to belong to the same group: delta G(ex) < O, delta S(ex) < O, delta H < O. (2) The liquid alloys: Mg-Tl, Mg-Sn, Mg-Pb, Mg-Bi are characterized by negative values for delta G(ex) and delta H over the entire range of concentration, while the values delta S(ex) in the system are mostly positive on the side of the eutectic poorest in magnesium which has the lowest melting point. (3) The liquid alloys: Mg-Si and Mg-Ni belong to the group delta G(ex) < O, delta S(ex) < O, delta H < O. (4) The minimums on curves delta G(ex), delta S(ex) and delta H appear on the side of intermediate phases of variable content or compound showing congruent melting of temperatures higher than the other compounds. (5) Deviations from the behavior of ideal liquid solutions in the following series, Mg-Al and Mg-Si, Mg-Zn and Mg-Ga, Mg-Cd, Mg-In, Mg-Sn and Mg-Sb, Mg-Tl, Mg-Pb and Mg-Bi, increase of the periodical number in the compound closest to the noble metal in the given periodic group.

Descriptors :   (*THERMODYNAMICS, LIQUID METALS), (*MAGNESIUM ALLOYS, THERMODYNAMICS), GALLIUM ALLOYS, INDIUM ALLOYS, THALLIUM ALLOYS, INTERMETALLIC COMPOUNDS, SOLUTIONS(MIXTURES).

Subject Categories : Metallurgy and Metallography
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE