Vaporization thermodynamics of Pd-B(Liquid) and Pd-B-C(Liquid)

The Pd-B and Pd-B-C liquid phases were studied by the Knudsen effusion technique to determine the variation of palladium and boron activity with composition and temperature. Equations are given which describe the thermodynamic properties throughout the liquid phase region. In addition, the phase bou...

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Bibliographic Details
Published in:Journal of the less-common metals 1987-11, Vol.135 (2), p.217-228
Main Authors: Storms, E.K., Szklarz, E.G.
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Metals, semimetals and alloys
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Physics
Specific materials
Thermal properties of condensed matter
Thermal properties of crystalline solids
Thermodynamic properties
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Summary:The Pd-B and Pd-B-C liquid phases were studied by the Knudsen effusion technique to determine the variation of palladium and boron activity with composition and temperature. Equations are given which describe the thermodynamic properties throughout the liquid phase region. In addition, the phase boundary composition was determined between the liquid and the respective multiphase containing excess boron. The phase forms solid boron at 1600 K when the composition reaches Pd 0.55B 0.45 and the palladium activity is 0.0186. Dissolved carbon causes the palladium activity to increase and the phase boundary to shift to a higher boron composition.
ISSN:0022-5088
DOI:10.1016/0022-5088(87)90483-8