High-entropy alloys (HEA) belong to a new class of alloys whose compositions are based on at least five major elements. As a result of this mixture of elements, the effect of the high entropy is relevant, which allows the formation of multi-component solid solutions, which usually have simple crystalline structures. HEA has promoted the interest of researchers from all over the world due to its microstructural features and a wide range of properties. Among the properties that have been reported, some HEA stand out for properties of high wear resistance. The research group of DEMa/UFSCar has been devoted in recent years to the development of alloys for use as coatings that have at the same time high resistance to wear and to corrosion. The processes usually employed in producing the metallic coatings generally involve rapid solidification. Based on that, this research project proposes a study of the effect of cooling rate on the microstructure evolution of HEA of the AlxCoFeCrNiBy system containing small amounts of boron. The addition of small amount of boron in the composition of the HEA favors the formation of hard borides, which are reported as being extremely beneficial for wear resistance of the alloys. Thus, this project proposes the evaluation of the effect of cooling rate during solidification of alloys in the formation of the high entropy phase and the fraction, distribution and morphology of the formed borides.
News published in Agência FAPESP Newsletter about the scholarship: