Abstract Scope |
Concentrated refractory alloys demonstrate great potential for use in high-temperature, structural applications due to their reported high-temperature strength, potential for density reduction, and environmental resistance, amongst other favorable material properties. This includes alloys that are categorized as high-entropy alloys (e.g. HEAs), as well as, alloys consisting of fewer than five base elements, albeit concentrated in nature (e.g. complex concentrated alloys, CCAs). With respect to oxidation, the compositional complexity of these alloys enables inherent complex oxide formation, offering sluggish oxidation kinetics that are not readily accessible in conventional, dilute refractory alloys. However, the fundamental mechanisms governing this behavior, and the ability to synergistically couple environmental resistance with other salient properties (e.g. mechanical strength), are not well understood. This talk will outline recent developments in the community’s understanding of this space. Existing knowledge gaps and key opportunities will be discussed relative to conventional refractory alloys. |