  In recent times,there has been a significant volume of work on Eutectic High
Entropy Alloys (EHEAs) owing to their remarkable castability combined with
excellent mechanical properties,which aids in clearing obstacles for their
technological applications. One of the most common EHEAs,which has been of
enormous interest at present, primarily owing to its solidification and tensile
behavior, is AlCoCrFeNi$_{2.1}$. However,to aim for high-temperature
applications,oxidation behaviour of material is one of the major aspects that
needs to be extensively investigated.To this end,the present work aims to study
the phases evolved during oxidation at elevated temperatures as high as 950 and
1000$^\circ$C in AlCoCrFeNi$_{2.1}$ using XRD and also to determine the rate
law followed for isothermal oxidation of this alloy at 950 and 1000$^\circ$C,in
order to understand the role of Al$_2$O$_3$ phase formed during isothermal
oxidation at 950 and 1000$^\circ$C.
