Detail publikace
Vliv objemového podílu křehkých částic v kompozitu se skelnou matricí na změny v mikromechanismu lomu
ŘEHOŘEK, L. CHLUP, Z. DLOUHÝ, I. BOCCACCINI, A.
Český název
Vliv objemového podílu křehkých částic v kompozitu se skelnou matricí na změny v mikromechanismu lomu
Anglický název
Changes in Fracture Micromechanism with Increasing Reinforcement Volume Fraction in Glass Matrix Composite
Typ
článek v časopise - ostatní, Jost
Jazyk
en
Originální abstrakt
Fracture behaviour and mechanical properties are the key features when a material for given application is supposed to be selected. Advanced glass ceramics composites are perspective structural materials for many applications due to their low production expenses and satisfactory properties even at elevated temperatures. Borosilicate glass matrix composite reinforced by alumina platelets was investigated to describe toughening mechanisms and their changes in a wide range of temperatures (from room temperature up to glassy transition temperature Tg). The dissipation of energy by bridging and/or deflection of propagating crack by alumina platelets uniformly dispersed in the glass matrix were the main toughening mechanisms observed. The alumina platelets have a higher ability to deflect propagating crack in comparison with spherical or rectangular particles having the same volume. Three and four point bend test for Youngs modulus and flexural strength determination was used. Fracture toughness determination was conducted using chevron notch technique. More than 100% increase of fracture toughness was observed when 30% of alumina platelets were added in to borosilicate matrix.
Český abstrakt
Lomové chování a mechanické vlastnosti hrají klíčovou roli pro všechny materiály v inženýrské praxi. Skelné kompozity jsou perspektivní materiály v mnoha aplikacích pro jejich snadnou a levnou výrobu. V této práci bylo studováno lomové chování borosilikátového skla s destičkami korundu a jejich vliv na zhouževnaťování a změnu morfologie lomové plochy. Byl aplikován tří a čtyřbodový ohyb a byly měřeny: lomová houževnatost, pevnost v ohybu, modul pružnosti.
Anglický abstrakt
Fracture behaviour and mechanical properties are the key features when a material for given application is supposed to be selected. Advanced glass ceramics composites are perspective structural materials for many applications due to their low production expenses and satisfactory properties even at elevated temperatures. Borosilicate glass matrix composite reinforced by alumina platelets was investigated to describe toughening mechanisms and their changes in a wide range of temperatures (from room temperature up to glassy transition temperature Tg). The dissipation of energy by bridging and/or deflection of propagating crack by alumina platelets uniformly dispersed in the glass matrix were the main toughening mechanisms observed. The alumina platelets have a higher ability to deflect propagating crack in comparison with spherical or rectangular particles having the same volume. Three and four point bend test for Youngs modulus and flexural strength determination was used. Fracture toughness determination was conducted using chevron notch technique. More than 100% increase of fracture toughness was observed when 30% of alumina platelets were added in to borosilicate matrix.
Klíčová slova anglicky
glass-ceramics, fracture mechanics, fracture toughness, roughness, toughening
Rok RIV
2008
Vydáno
06.12.2007
Místo
Švýcarsko
ISSN
0255-5476
Časopis
Materials Science Forum
Ročník
567-568
Číslo
2008
Strany od–do
369–372
Počet stran
4
BIBTEX
@article{BUT44816,
author="Lukáš {Řehořek} and Zdeněk {Chlup} and Ivo {Dlouhý} and Aldo {Boccaccini},
title="Changes in Fracture Micromechanism with Increasing Reinforcement Volume Fraction in Glass Matrix Composite",
journal="Materials Science Forum",
year="2007",
volume="567-568",
number="2008",
month="December",
pages="369--372",
address="Švýcarsko",
issn="0255-5476"
}