Degradation transformation in spinel-type functional thick-film ceramic materials

• Published in: Microelectronics and reliability Vol. 54; no. 12; pp. 2843 - 2848
• Main Authors: Klym, H., Balitska, V., Shpotyuk, O., Hadzaman, I.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.12.2014; Elsevier
• Subjects: Ageing; Ceramics; Condensed matter: structure, mechanical and thermal properties; Degradation; Equations of state, phase equilibria, and phase transitions; Exact sciences and technology; Fatigue, brittleness, fracture, and cracks; Manganites; Mathematical analysis; Mathematical models; Mechanical and acoustical properties of condensed matter; Mechanical properties of solids; Physics; Relaxation function; Solid-solid transitions; Specific phase transitions; Thick films; Transformations; Transformations (mathematics); Degradation; Ceramics; Ageing; Relaxation function; Thick films; Ceramic matrix composite; Multilayer coating; Thermal ageing; Nanostructures; Topology; Exponential function; Thick film devices; Spinel; Transition elements; Modelling; Kinetics; Microstructure; Slabs; Manganites
• ISSN: 0026-2714; 1872-941X
• DOI: 10.1016/j.microrel.2014.07.137

•Thermally-induced relaxation in spinel ceramics obeys stretched exponential behavior.•Stretched-exponential kinetics is proper to own degradation.•Suppressed exponential kinetics reflects two or more elementary processes. The mathematical models of thermally-induced degradation processes in solids with nano- and microscale topological disordering – bulk and thick-film ceramic composites based on mixed transition-metal manganites are considered. It was shown that degradation transformations in these materials are best described by stretched or suppressed exponential relaxation function. The stretched exponential degradation kinetics is proper to own degradation transformations in such one-type systems as bulk ceramics and multilayered thick-film structures. The mechanism of degradation transformations in one-layered thick films, including two or more different on their origin elementary are described by suppressed exponential kinetics.