Transformations in CoCrCuFeNi MPEA thin films during in-situ annealing in TEM

Abstract

In recent years, multi-principal element alloys (MPEA) are a new type of alloys, which have been developed based on high-entropy alloys. These alloys are complex solid solutions, in which the different components occupy the available lattice sites randomly, allowing them to form simple crystalline phases such as BCC and FCC instead of the expected intermetallic compounds and exhibit an excellent combination of structural and functional properties compared to the traditional materials. Nowadays, highentropy films have shown a fast development potential in various fields and the need to understand their formation, their stability and the origin of their unusual properties became relevant.