Temperature dependence of damping in silica refractories measured via the impulse excitation technique

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F18%3A43916697" target="_blank" >RIV/60461373:22310/18:43916697 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0272884218303237" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0272884218303237</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ceramint.2018.02.028" target="_blank" >10.1016/j.ceramint.2018.02.028</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Temperature dependence of damping in silica refractories measured via the impulse excitation technique

Popis výsledku v původním jazyce

Using high-temperature impulse excitation the temperature dependence of damping, quantified by the so-called inverse quality factor, has been measured for silica refractories with porosities of 13-17% up to 1200 degrees C. Damping-temperature curves exhibit closed loops between heating and cooling and do not show any indication of damage accumulation after two complete heating-cooling cycles. The temperature dependence of damping exhibits features that are due to an interplay between phase transitions (between the subpolymorphs of tridymite and cristobalite) and microstructure (reversible closure re-opening of preexisting microcracks) and are also known from resonant frequency measurements. Additionally, however, the temperature dependence of damping reveals some details that are undetectable by resonant frequency measurements and may tentatively be attributed to the competition between microcrack closure and increased dry friction (damping peak at approximately 325 degrees C) and to a phase transition of the dicalcium silicate phase shannonite (damping increase in the range 700-800 degrees C).

Název v anglickém jazyce

Temperature dependence of damping in silica refractories measured via the impulse excitation technique

Popis výsledku anglicky

Using high-temperature impulse excitation the temperature dependence of damping, quantified by the so-called inverse quality factor, has been measured for silica refractories with porosities of 13-17% up to 1200 degrees C. Damping-temperature curves exhibit closed loops between heating and cooling and do not show any indication of damage accumulation after two complete heating-cooling cycles. The temperature dependence of damping exhibits features that are due to an interplay between phase transitions (between the subpolymorphs of tridymite and cristobalite) and microstructure (reversible closure re-opening of preexisting microcracks) and are also known from resonant frequency measurements. Additionally, however, the temperature dependence of damping reveals some details that are undetectable by resonant frequency measurements and may tentatively be attributed to the competition between microcrack closure and increased dry friction (damping peak at approximately 325 degrees C) and to a phase transition of the dicalcium silicate phase shannonite (damping increase in the range 700-800 degrees C).

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20504 - Ceramics

Projekt

<a href="/cs/project/GA15-18513S" target="_blank" >GA15-18513S: Příprava a charakterizace oxidové a silikátové keramiky s řízenou mikrostrukturou a modelování souvislostí mezi mikrostrukturou a vlastnostmi</a><br>

Návaznosti

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

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Ceramics International

ISSN

0272-8842

e-ISSN

—

Svazek periodika

44

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

8363-8373

Kód UT WoS článku

000428974300131

EID výsledku v databázi Scopus

2-s2.0-85041919109