Abstract
The effects of Al content on the oxidation resistance of AlMo0.5NbTa0.5TiZr refractory high entropy alloys (RHEAs) were investigated. The oxidation obeys a power-law passivating oxidation at the early stage, followed by a transformation to linear oxidation. Increasing Al content reduces the mass change of forming the full coverage of passivating scale and prolongs the passivation duration of alloys. Higher Al content benefits the formation of AlNbO4 and AlTaO4 instead of Nb2O5 and Ta2O5, which has a positive effect on oxidation resistance of alloys. The fracture of scales generally occurs at the mass gain of 15 mg∙cm−2 roughly and leads to the transformation to linear oxidation.
Sign-in/Register to access full text options 
Free) 
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 call
