Positron annihilation lifetime spectroscopy in application to nanostructured glasses and ceramics

Date
2017-12-23
Authors
Klym, Halyna
Kostiv, Yuriy
Journal Title
Journal ISSN
Volume Title
Publisher
Видавництво Львівської політехніки
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)).