Abstract
A comparative study of the oxidation behaviour of Zr 3Al and α-Zr-1wt.%Al was performed in dry oxygen at temperatures of 647–1050 K. The oxidation of both phases follows a parabolic rate law. The rate of oxidation of α-ZrAl is higher than that of Zr 3Al. The oxide layer on α-ZrAl consisted mainly of monoclinic ZrO 2 with traces of cubic ZrO 2. An activation energy of 274.4 kJ mol −1 was estimated. Only cubic ZrO 2 was formed on Zr 3Al up to temperatures of about 790 K. At temperatures above 790 K monoclinic ZrO 2 was formed in addition to cubic ZrO 2. Two values of the activation energy for the oxidation of Zr 3Al were estimated: 114.0 kJ mol −1 at temperatures below 800 K and 53.1 kJ mol −1 at temperatures above 800 K.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
