High Temperature Oxidation Behavior of Conventional and Nb-Modified MAR-M246 Ni-Based Superalloy - Alkmin, Luciano Braga; Chaia, Nabil; Utada, S; Cormier, Jonathan; Baldan, Renato; Coelho, Gilberto Carvalho; Nunes, Carlos Angelo (Metallurgical and materials transactions a-physical metallurgy and materials science, 2021)