to develope the conceptual framework necessary to design thermodynamically stable multi-component nc metal alloys resistant to coarsening;
to validate the statistical thermodynamic modeling by matching numerical simulation with experimental evidence;
to provide a proof of concept by fabricating selected thermodynamically stable multi-component nc metal alloys resistant to coarsening of interest for specific aerospace applications.
To achieve these goals, ICARUS fosters a three-parts multidisciplinary strategy:
Thermodynamic modeling will make use of a statistical mechanical approach. Thermodynamic state functions and auxiliary quantities will be described mathematically in terms of chemical composition and atomic species distribution in both crystalline grains and intergranular disordered interfaces.
The validation of the thermodynamic model will require identifying suitable processing methods and optimizing experimental conditions. Depending on the number of components, developing innovative processing methods is necessary. For this reason, validation will be first performed on suitably selected test systems.
The fabrication of thermodynamically stable multi-component nc metal alloys resistant to coarsening and specifically addressed to meet the materials demand of aerospace, aeronautical and turbine industry will require a careful selection of materials.
Specific attempts will be carried out in connection with the needs pointed out by SMEs involved in ICARUS. In this regard, the project focuses on materials with the following target properties:
Enhanced radiation resistance by self-healing mechanisms, aimed at withstanding the extreme conditions undergone by materials exposed to cosmic radiation, at lengthening the life cycle of aerospace materials and microelectronics, and at protecting the health status of human beings in manned spacecraft missions.
Enhanced thermal resistance, aimed at enabling stable performances under high-temperature conditions, high heat conduction and low thermal expansion, and at enhancing materials performances in dynamic thermal environments with temperature varying approximately in the range from -80 and 100 ºC.
High mechanical strength to reduce the total weight associated with structural materials, keeping mechanical performances unchanged, which results in lighter construction elements and directly lower fuel consumption in aerospace industry.