Study of deformation micro-mechanisms of cold sprayed coatings by positron annihiltion spectroscopy
Project ID:GA22-14048S
Provider:Czech Science Foundation
Period:Jan 01, 2022 - Dec 31, 2024
Recipient -- coordinator:Faculty of Mathematics and Physics, Charles University, Prague -- prof. Jakub Čížek, Ph.D.
Co-recepient(s) / PI(s):Institute of Plasma Physics, Czech Academy of Sciences, Prague -- Ing. Jan Čížek, Ph.D.
Co-investigators from IPPJ. Medřický, F. Lukáč, . Csáki, J. Klečka

Aims of the project: Cold spray additive manufacturing technology (CSAM) is a novel and progressive method of deposition of metals and alloys. Its inherent work principles allow production of the materials below their melting points, thereby avoiding many material degradation processes. In addition, considering its excellent economy and significantly higher material throughput over the laser-based techniques, CSAM may in fact soon become a gamechanger in the entire 3D print industry. The proposed project focuses on deformation process in CSAM. Until now, the critical phenomenon was studied on macro and meso-scale. However, its exact underlying physical principles are still not understood fully and contradicting theories appeared as late as 2018. Positron annihilation spectroscopy (PAS) is an analytical technique capable of studying deformation on the atomic scale, even in extremely deformed materials. It was never used for CSAM before, though. Using PAS on CSAM materials for the first time in history, a significant contribution to our knowledge of the deformation phenomenon in CSAM could be made.

Results:

Kondas J., Guagliano M., Bagherifard S., Singh R., Čížek J., Konopik P., Procházka R., Kachlik M.: Cold Spray Additive Manufacturing of Ti6Al4V: Deposition Optimization. Journal of Thermal Spray Technology 33 [8] (2024) 2672-2685, č. článku 107. [ Abstract ] [ Link ]

Kondás J., Guagliano M., Bagherifard S., Singh R., Čížek J., Lukáč F., Konopik P., Rzepa S.: Importance of feedstock powder selection for mechanical properties improvement of cold spray additively manufactured Ti6Al4V deposits. Additive Manufacturing Letters 9 [April] (2024) č. článku 100199. [ Abstract ] [ Link ]

Čížek J., Medřický J., Štefaník F., Lukáč F., Čupera J., Kondás J., Singh R., Melikhova O., Hruška P., Čížek J.: Cold Sprayed Deposits Characterized by Positron Annihilation Spectroscopy. Journal of Thermal Spray Technology 33 (2024) 666-675. [ Abstract ] [ Link ]

Jafari R., Čížek J., Lukáč F., Cvrček L., Buřil M., Walter J., Honkanen M., Vippola M., Koivuluoto H.: A Comparative Study on Wear Resistance of Cold-Sprayed Aluminum/Quasicrystal Composite Coatings. Journal of Thermal Spray Technology 33 [2-3] (2024) 705-718. [ Abstract ] [ Link ]

Koller M., Čížek J., Janovská M., Ševčík M., Kondas J., Singh R., Seiner H.: Scanning Acoustic Microscopy Characterization of Cold-Sprayed Coatings Deposited on Grooved Substrates. Journal of Thermal Spray Technology 33 [6] (2024) 1941-1954. [ Abstract ] [ Link ]

Singh R., Kondás J., Bauer Ch., Čížek J., Medřický J., Csáki Š., Čupera J., Procházka R., Melzer D., Konopník P.: Bulk-like ductility of cold spray additively manufactured copper in the as-sprayed state. Additive Manufacturing Letters 3 [December] (2022) č. článku 100052. [ Abstract ] [ Link ]

Jones R., Kovařík O., Čížek J., Ang A., Lang J.: Crack growth in conventionally manufactured pure nickel, titanium and aluminum and the cold spray additively manufactured equivalents. Additive Manufacturing Letters 2 [3] (2022) č. článku 100043. [ Abstract ] [ Link ]