High Temperature Electromotive Force Measurements of Al-rich Binary Ni-Al Alloys
Open Access
Author:
Elbaar, Nadia A
Graduate Program:
Materials Science and Engineering
Degree:
Master of Science
Document Type:
Master Thesis
Date of Defense:
February 18, 2021
Committee Members:
Hojong Kim, Thesis Advisor/Co-Advisor Suzanne E Mohney, Committee Member John C Mauro, Committee Member John C Mauro, Program Head/Chair
Keywords:
electromotive force NiAl alloys electrochemistry
Abstract:
This work investigates the Ni-Al binary, noting its predominance
in both oxidation/corrosion- coatings and structural alloys. Activity is an
important property to describe solution behavior, in this case, of Al in Al-Ni solution.
Electromotive force is used to measure activity of Al in Al-rich AlNi alloys at temperatures
500-850 °C. Calibration of a stable reference electrode for high temperature
measurements resulted in alloy composition xAl = 0.70 as a suitable reference electrode
for the system. The electromotive force of compositions xAl = 0.63, 0.80, 0.90
are measured at 500-850 °C and used to calculate activity of aluminum and other
thermodynamic properties.
