Refractory complex concentrated alloys: high throughput mapping of a compositional space
Project ID:GA22-24563S
Provider:Czech Science Foundation
Period:Jan 01, 2022 - Dec 31, 2024
Recipient - coordinatorInstitute of Plasma Physics, Czech Academy of Sciences, Prague
Principal Investigator:Ing. Tomáš Chráska, Ph.D.
Co-recepient(s) / PI(s):Faculty of Mathematics and Physics, Charles University, Prague -- RNDr. PhDr. Josef Stráský Ph.D.
Co-investigators from IPPJ. Matějíček, M. Vilémová, F. Lukáč, M. Nižňanský

Aims of the project: Phase diagrams are core tools in solid-state physics and materials science and are of utmost interest for designing metallic materials, including a new class of alloys referred to as Complex Concentrated Alloys (CCAs). Contrary to the development of traditional alloys based on one principal element, which requires exploring only corners of multi-element phase diagrams, we aim at exploring central parts of the multi-dimensional phase diagrams of CCAs. Such phase diagrams must be determined empirically, which seems to be an impossible task due to the vast composition space of CCAs. We propose employing the Field Assisted Sintering Technique (FAST) for manufacturing of gradient samples of selected CCAs from blended elemental powders for a high throughput analysis. Detailed characterization of each gradient sample allows us to map a significant part of the multi-dimensional phase diagram. Quinary phase diagrams of three important alloying systems showing promising properties for high-temperature applications (so-called refractory CCA) will be constructed by this innovative approach.

Results:

Kozlík J., Lukáč F., Luna M. C., Šalata K., Stráský J., Veselý J., Jača E., Chráska T.: Phase Composition of AlTiNbMoV, AlTiNbTaZr and AlTiNbMoCr Refractory Complex Concentrated Alloys: A Correlation of Predictions and Experiment. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 55 [12] (2024) 4981-4997. E. [ Abstract ] [ Link ]

Kozlík J., Preisler D., Haasová M., Stráský J., Chráska T., Janeček M.: Mechanical Properties of Ti–5Al–5V–5Mo–3Cr Alloy Sintered From Blended Elemental Powders. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 54 [7] (2023) 2703-2714. E. [ Abstract ] [ Link ]

Nižňanský M., Vanmeensel K., Vleugels J., Tyrpekl V., Vilémová M.: Review on high-pressure spark plasma sintering and simulation of the impact of die/punch material combinations on the sample temperature homogeneity. Open Ceramics 16 [December] (2023) č. článku 100433. E. [ Abstract ] [ Link ]