Positron annihilation lifetime spectroscopy in application to nanostructured glasses and ceramics
Date
2017-12-23
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Видавництво Львівської політехніки
Lviv Polytechnic Publishing House
Lviv Polytechnic Publishing House
Abstract
Modified nanostructured Ge-Ga-Se chalcogenide
glasses and oxide MgO-Al2O3 ceramics were investigated using
positron annihilation lifetime spectroscopy. It was shown that
crystallization process in 80GeSe2-20Ga2Se3 glasses annealed
at 380°C for 25 and 50 h indicates specific free-volume
transformation. It is established that water vapor modifies
defects located near grain boundaries in MgO-Al2O3 ceramics
sintered at 1300 °C, the process being accompanied by void
fragmentation at water adsorption with further void
agglomeration at water desorption after drying.
Description
Keywords
ceramics, glass, positron annihilation, modification, free volume, nanovoids
Citation
Klym H. Positron annihilation lifetime spectroscopy in application to nanostructured glasses and ceramics / Halyna Klym, Yuriy Kostiv // Litteris et Artibus : proceedings, 23–25 November, 2017. — Lviv : Lviv Polytechnic Publishing House, 2017. — P. 430–431. — (9th International academic conference «Computer science & engineering 2017» (CSE-2017)).