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Enthalpy of Mixing in Al–Tb Liquid
Entropy
  • Shihuai Zhou, Ames Laboratory
  • Carl Tackes, Iowa State University
  • Ralph Napolitano, Iowa State University and Ames Laboratory
Document Type
Article
Publication Version
Published Version
Publication Date
6-21-2017
DOI
10.3390/e19060290
Abstract

The liquid-phase enthalpy of mixing for Al–Tb alloys is measured for 3, 5, 8, 10, and 20 at% Tb at selected temperatures in the range from 1364 to 1439 K. Methods include isothermal solution calorimetry and isoperibolic electromagnetic levitation drop calorimetry. Mixing enthalpy is determined relative to the unmixed pure (Al and Tb) components. The required formation enthalpy for the Al3Tb phase is computed from first-principles calculations. Based on our measurements, three different semi-empirical solution models are offered for the excess free energy of the liquid, including regular, subregular, and associate model formulations. These models are also compared with the Miedema model prediction of mixing enthalpy.

Comments

This article is published as Zhou, Shihuai, Carl Tackes, and Ralph Napolitano. "Enthalpy of Mixing in Al–Tb Liquid." Entropy 19, no. 6 (2017): 290. DOI: 10.3390/e19060290. Posted with permission.

Creative Commons License
Creative Commons Attribution 4.0
Copyright Owner
The Authors
Language
en
File Format
application/pdf
Citation Information
Shihuai Zhou, Carl Tackes and Ralph Napolitano. "Enthalpy of Mixing in Al–Tb Liquid" Entropy Vol. 19 Iss. 6 (2017) p. 290
Available at: http://works.bepress.com/ralph_napolitano/25/