Modeling the effect of the addition of alumina on structural characteristics and tensile deformation response of aluminosilicate glasses

Modeling the effect of the addition of alumina on structural characteristics and tensile deformation response of aluminosilicate glasses

Մատենագիտական մանրամասներ
Parent link:Ceramics International
Vol. 46, iss. 13.— 2020.— [P. 21657-21666]
Համատեղ հեղինակ: Национальный исследовательский Томский политехнический университет Инженерная школа новых производственных технологий Отделение материаловедения
Այլ հեղինակներ: Benitez T. Tobias, Rivas Murillo John Sandro, de Ligny Dominique, Travitsky (Travitzky) N. Nakhum, Novaes de Oliveira Antonio Pedro, Hotza D. Dachamir
Ամփոփում:Title screen
Aluminosilicate glasses, xAl2O3-(1-x)SiO2 with variable molar ratio 0 <= x <= 60%, were modeled by molecular dynamics (MD) in order to investigate the structural characteristics such as: coordination number and pair-angle distribution functions responsible for their mechanical performance. MD simulations showed that Si atoms coordinated to four O atoms are independently of the chemical composition. The number of O atoms coordinated to two decreased as the amount of Al2O3 is increased, while the opposite happened to O atoms coordinated to three. Al atoms coordinated to four O atoms were reduced as the amount of Al2O3 increases, whereas Al atoms coordinated to five O atoms were increased. Moreover, pair distribution function (PDF) study confirmed that the addition of Al2O3 causes densification of the aluminosilicate samples and, angle distribution function (ADF) corroborated PDF results and explained intermediate and long-range disorder structures of glasses. Assessment of the structural damage under uniaxial tension showed that aluminosilicate glasses are more capable of withstanding deformation without total structural failure than pure silica glasses.
Режим доступа: по договору с организацией-держателем ресурса
Հրապարակվել է: 2020
Խորագրեր:
электронный ресурс
труды учёных ТПУ
molecular dynamics
aluminosilicates
glass-ceramics
armor
молекулярная динамика
алюмосиликаты
стеклокерамика
добавки
оксид алюминия
деформации
растяжение
Առցանց հասանելիություն:https://doi.org/10.1016/j.ceramint.2020.05.273
Ձևաչափ: Էլեկտրոնային Գրքի գլուխ
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=665234

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