Comparison of Plasma Sprayed High Entropy Alloys with Conventional Bond Coat Materials
Comparison of Plasma Sprayed High Entropy Alloys with Conventional Bond Coat Materials
Wednesday, May 13, 2015: 8:00 AM
Room 102B (Long Beach Convention and Entertainment Center)
High Entropy Alloys (HEAs) are a new class of alloys with multi-principle elements in equi-atomic ratio that present novel phase structures. HEAs are known to for their high temperature microstructural stability, enhanced oxidation and wear resistance properties. Apart from bulk material consolidation methods such as casting and sintering, HEAs can also be deposited as a surface coating. In this work, thermal sprayed HEA coatings are investigated as an alternative bond coat material for a thermal barrier coating system. Nanostructured HEAs that were based on AlCoCrFeNi and MnCoCrFeNi were prepared by ball milling and then plasma sprayed. Splat studies were assessed to optimise the appropriate thermal spray parameters and spray deposits were prepared. Subsequently, the microstructure and mechanical properties of both type of HEAs coatings were characterized and compared to conventional plasma spray NiCrAlY bond coats.
See more of: Bond Coat Development for TBCs
See more of: Advanced Coatings for the Aerospace Industry
See more of: Advanced Coatings for the Aerospace Industry