Title
Thermal analysis of undercooled metallic liquids by electromagnetic levitation drop calorimetry
Degree Type
Thesis
Date of Award
2013
Degree Name
Master of Science
Department
Materials Science and Engineering
First Advisor
Ralph E. Napolitano
Abstract
Here the role of thermodynamic measurements in computational materials science (with a focus on metallic glasses) is described, of which the heat capacity of the undercooled liquid is identified as a key measurement. Traditional experimental techniques for generating thermodynamic measurements are then reviewed, as well as techniques that focus on the undercooled liquid. Then the development of a levitation calorimeter is presented, and the results of applying the technique to several binary Al-based glass forming compositions is described. The enthalpy of a reactive Al-rare earth liquid was measured as well as the enthalpy of the undercooled liquid of Al-rare earth glass forming compositions. The results indicated a constant heat capacity of the liquid throughout the temperature range studied, which is discussed with respect to liquid behavior. Additionally, the containerless levitation technique enabled the in-situ formation of metastable Al-Sm phases.
Copyright Owner
Carl Tackes
Copyright Date
2013
Language
en
File Format
application/pdf
File Size
174 pages
Recommended Citation
Tackes, Carl, "Thermal analysis of undercooled metallic liquids by electromagnetic levitation drop calorimetry" (2013). Graduate Theses and Dissertations. 13316.
https://lib.dr.iastate.edu/etd/13316
