Metastable states of complex concentrated Ag–Pd–Pt–Cu–Ni alloy obtained by synthesis of nanoparticlesTerzić, Lidija (Avtor) Anžel, Ivan (Mentor) Rudolf, Rebeka (Komentor) Complex concentrated alloysHigh entropy alloysThermodynamically metastable microstructuresRapid solidificationUltrasonic spray pyrolysis.Doctoral dissertation explores the synthesis and characterization of metastable states within a novel complex concentrated noble alloy (CCNA) composed of equi-atomic portion of silver (Ag), palladium (Pd), platinum (Pt), copper (Cu), and nickel (Ni). Completed research activities enable the understanding of processes and reactions that were crucial in evolution of thermodynamically metastable microstructures through production of rapidly solidified ribbons and synthesis of nanoparticles (NP). Two techniques, namely melt spinning and ultrasonic spray pyrolysis (USP) had been successfully used to achieve homogeneous high entropy microstructures and were confirmed as suitable for transformation of multiphase inhomogeneous CCNA microstructures into high entropy ones. Achieved thermodynamically metastable microstructures enable the achievement of potential functional properties of selected alloy due to increased surface area and optimized active centres (Ag, Pd, Pt, Cu, Ni) for catalytic activity. In the dissertation explained processes and reactions that occurred in the development of the microstructure of equi-atomic Ag-Pt-Pd-Cu-Ni CCNA during rapid solidification and ultrasonic spray pyrolysis represent an important contribution to the field of materials science.[L. Simić]20252024-04-24 15:14:58Doktorsko delo/naloga88439UDK: 669.21/.23.017.16:54-172(043.3)COBISS_ID: 263645699sl