skip to main content

DOE PAGESDOE PAGES

Title: Enthalpy of Mixing in Al–Tb Liquid

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. Finally, 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.
Authors:
 [1] ;  [2] ;  [3]
  1. Ames Lab., Ames, IA (United States). Division of Materials Science and Engineering
  2. Iowa State Univ., Ames, IA (United States). Dept. of Materials Science and Engineering
  3. Ames Lab., Ames, IA (United States). Division of Materials Science and Engineering; Iowa State Univ., Ames, IA (United States). Dept. of Materials Science and Engineering
Publication Date:
Report Number(s):
IS-J-9298
Journal ID: ISSN 1099-4300; ENTRFG; PII: e19060290
Grant/Contract Number:
AC02-07CH11358
Type:
Accepted Manuscript
Journal Name:
Entropy
Additional Journal Information:
Journal Volume: 19; Journal Issue: 6; Journal ID: ISSN 1099-4300
Publisher:
MDPI
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Al–Tb; mixing; enthalpy; electromagnetic levitation; solution calorimetry
OSTI Identifier:
1373369