High-temperature elastic properties of ceramics in the system MgO-Al2O3-SiO2 measured by impulse excitation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F14%3A43898420" target="_blank" >RIV/60461373:22310/14:43898420 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

High-temperature elastic properties of ceramics in the system MgO-Al2O3-SiO2 measured by impulse excitation

Popis výsledku v původním jazyce

Young's moduli of talc-based ceramics from the system MgO-Al2O3-SiO2 are measured for temperatures up to 1000 °C via impulse excitation. It is shown that, after pressing at 50 MPa and firing at 1280 °C, MgO-rich compositions exhibit higher porosity and lower Young's moduli (approximately 20-30 % lower than predicted via micromechanical relations). The Young moduli of materials with less MgO decrease with temperature, but those of MgO-rich ceramics increase with temperature and exhibit a large hysteresisbetween heating and cooling. Lower absolute values are mainly due to increased porosity, but the reason for the modulus increase with temperature and the hysteresis is the higher enstatite content in the MgO-rich compositions. For a special compositionthe Young's moduli are more or less temperature-independent and without significant hysteresis effects, probably due to the low content of enstatite and the high content of sapphirine.

Název v anglickém jazyce

High-temperature elastic properties of ceramics in the system MgO-Al2O3-SiO2 measured by impulse excitation

Popis výsledku anglicky

Young's moduli of talc-based ceramics from the system MgO-Al2O3-SiO2 are measured for temperatures up to 1000 °C via impulse excitation. It is shown that, after pressing at 50 MPa and firing at 1280 °C, MgO-rich compositions exhibit higher porosity and lower Young's moduli (approximately 20-30 % lower than predicted via micromechanical relations). The Young moduli of materials with less MgO decrease with temperature, but those of MgO-rich ceramics increase with temperature and exhibit a large hysteresisbetween heating and cooling. Lower absolute values are mainly due to increased porosity, but the reason for the modulus increase with temperature and the hysteresis is the higher enstatite content in the MgO-rich compositions. For a special compositionthe Young's moduli are more or less temperature-independent and without significant hysteresis effects, probably due to the low content of enstatite and the high content of sapphirine.

Druh

D - Stať ve sborníku

CEP obor

JH - Keramika, žáruvzdorné materiály a skla

OECD FORD obor

—

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Selected, peer reviewed papers from the 7th International Conference on Materials Structure and Micromechanics of Fracture MSMF7

ISBN

978-3-03785-934-6

ISSN

—

e-ISSN

—

Počet stran výsledku

4

Strana od-do

696-699

Název nakladatele

Trans Tech Publications

Místo vydání

Zürich

Místo konání akce

Brno (Czech Republic)

Datum konání akce

1. 7. 2013

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

—