The density and surface tension of dilute liquid Na-In alloys and comparison with liquid Na-Cd alloys
The density and surface tension of five liquid Na-ln alloys, containing between 0.5 and 7 at. pct In, have been measured in the temperature range 170° to 400°C using a maximum bubble pressure technique which incorporates an automatic pressure measuring and recording device. The results are compared with corresponding data reported previously for Na-Cd alloys. The gram-atomic volumes of the Na-ln alloys, calculated from the densities, indicate a substantial contraction on alloying which is, on average, about double that for the Na-Cd alloys and qualitatively consistent with thermodynamic data for the two systems.
The surface tension of liquid sodium is increased slightly on adding indium, indicating a lower indium concentration in the surface than in the bulk, in contrast to the marked surface active behavior of cadmium. The surface excess concentrations of indium and cadmium are calculated using Gibbs’ adsorption equation. The surface excess entropy, estimated from the temperature dependence of the surface tension, is compared and briefly discussed for the two systems.
KeywordsSurface Tension Liquid Alloy Metallurgical Transaction Volume Atomic Volume Brookhaven National Laboratory
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- 1.O. Kubaschewski and J. A. Catterall:Thermodynamical Data of Alloys, Pergamon Press, London, 1956.Google Scholar
- 2.P. Bolsaitis and L. Skolnick:Trans. TMS-AIME, 1968, vol. 242, p. 215.Google Scholar
- 6.H. J. Fisher and A. Philips:J. Metals, 1954, vol. 6, p. 1060.Google Scholar
- 7.Liquid Metals Handbook: U. S. Office of Naval Research, Washington, D. C, 1952.Google Scholar
- 8.P. J. Spencer: DCS Report 10, National Physical Laboratory, March, 1971.Google Scholar
- 9.H. A. Davies:Trans. TMS-AIME, 1967, vol. 239, p. 928.Google Scholar