Regensburg 2022 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 26: Thin Oxides and Oxide Layers 2
DS 26.4: Vortrag
Donnerstag, 8. September 2022, 17:00–17:15, H14
Oxidation behavior of SMART alloys and MAX phases materials and applicability in solar receivers. — •Leonardo Guimarães Leal Lealdini1, Andrey Litnovsky1,2, and Jesus Gonzalez-Julian1,3 — 1Forschungszentrum, Jülich GmbH, 52425 Jülich, Germany — 2115409 Moscow, Russia — 3Institute of Mineral Engineering, RWTH Aachen University, 52064 Aachen, Germany
In the concept of materials for high-temperature application, two types of are being investigated: SMART alloys and MAX phase materials. W-Cr-Y SMART alloys were first designed for future fusion power plants. Studies suggests that SMART alloy containing Cr and Y is capable of forming a Cr2O3 layer and maintaining it at 1273K which avoids the generation of tungsten oxide. MAX Phase materials are able to provide great properties like oxidation resistance at high temperatures. Cr2AlC and Ti2AlC are two MAX phases that, in initial studies, provided a good oxidation response. Studies showed that Cr2AlC MAX phase and W-Cr-Y SMART alloy when exposed to 1273K and in humid atmosphere present good resistance to oxidation. Both were capable of withstand more than 20 hours in these conditions with a gain of mass lower than 0.3g/cm2. The main objective of this research is to evaluate the feasibility of both MAX phase materials and propose a new W-Al-Y SMART alloy, using them as solar receivers in concentrated solar power plants.