Young’s modulus of silicon carbide refractories and its temperature dependence after up to 250 firing cycles determined via impulse excitation

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F22%3A43925126" target="_blank" >RIV/60461373:22310/22:43925126 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Young’s modulus of silicon carbide refractories and its temperature dependence after up to 250 firing cycles determined via impulse excitation

Original language description

The temperature dependence of elastic properties provides fundamental information on the high-temperature performance of refractories. In this work, the temperature dependence of Young’s modulus is determined via impulse excitation for commercial silicon carbide (SiC) refractories after up to 250 firing cycles (1000 h at 1600 °C in a gas-fired industry kiln). It is found that the Young modulus of as-supplied SiC decreases from 272–281 GPa at 25 °C to 250–262 GPa at 1500 °C during heating but recovers during cooling. After 67–126 firing cycles in air at 1600 °C the room temperature values of Young’s modulus are as low as 234–260 GPa, due to the presence of cristobalite (SiO2). During heating, Young’s modulus exhibits a steep increase at 210 °C to values of 250–275 GPa at around 400 °C, followed by a slight decrease during further heating. During cooling a steep decrease occurs at 200 °C, due to the re-opening of microcracks (phase transition of cristobalite). The oxidation layers passivate the material against further oxidation, so that even after 250 firing cycles the samples still exhibit full shape integrity and Young’s modulus values of 230 GPa at 25 °C and 250 GPa at 400 °C, followed by the typical slight decrease towards 240 GPa at 1500 °C.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20504 - Ceramics

Project

<a href="/en/project/GA22-25562S" target="_blank" >GA22-25562S: Impulse excitation as an unconventional method for monitoring phase changes and microstructure evolution during thermal loading of materials</a><br>

Continuities

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

Publication year

2022

Confidentiality

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

Article name in the collection

Sborník přednášek Hutní keramika 2022

ISBN

978-80-88365-04-4

ISSN

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e-ISSN

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Number of pages

7

Pages from-to

"92–98"

Publisher name

Tanger s.r.o.

Place of publication

Ostrava

Event location

Rožnov pod Radhoštěm

Event date

Oct 4, 2022

Type of event by nationality

CST - Celostátní akce

UT code for WoS article

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