Bio-inspired damage-tolerant alumina-based layered ceramics through rapid sintering

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F26%3A0198244" target="_blank" >RIV/00216305:26620/26:0198244 - isvavai.cz</a>

Výsledek na webu

<a href="https://ceramics.onlinelibrary.wiley.com/doi/10.1111/jace.20706" target="_blank" >https://ceramics.onlinelibrary.wiley.com/doi/10.1111/jace.20706</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/jace.20706" target="_blank" >10.1111/jace.20706</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Bio-inspired damage-tolerant alumina-based layered ceramics through rapid sintering

Popis výsledku v původním jazyce

Layered ceramics have proved effective under contact damage or thermal shock, associated with the effect of compressive residual stresses and/or textured microstructure against surface crack propagation. In addition, the use of nonconventional sintering techniques, including rapid sintering, has demonstrated the feasibility of tailoring the size and/or shape of grains in bulk alumina materials. In this study, we explore the feasibility of rapid sintering alumina-based layered ceramics to enhance their damage tolerance, combining in-plane residual stresses and tailored microstructures in the different layers. Templated alumina layers embedded within a fine-grained alumina matrix are sintered using a pressureless spark plasma sintering (SPS) setup. The microstructure evolution of the individual layer regions is investigated under different sintering conditions. An optimal combination of highly textured internal layers with sharp interfaces and fine-grained alumina is found for heating rates of 100 degrees C min-1, maximum sintering temperature of 1600 degrees C, and 30 min dwell time. Hertzian contact and thermal shock experiments performed in selected rapid sintered samples show crack arrest and crack deflection in the textured layers, as found in conventionally sintered bio-inspired alumina ceramics. The successful rapid sintering of alumina-based multi-materials opens the path for further improvement in terms of reliability and damage tolerance in ceramic components.

Název v anglickém jazyce

Bio-inspired damage-tolerant alumina-based layered ceramics through rapid sintering

Popis výsledku anglicky

Layered ceramics have proved effective under contact damage or thermal shock, associated with the effect of compressive residual stresses and/or textured microstructure against surface crack propagation. In addition, the use of nonconventional sintering techniques, including rapid sintering, has demonstrated the feasibility of tailoring the size and/or shape of grains in bulk alumina materials. In this study, we explore the feasibility of rapid sintering alumina-based layered ceramics to enhance their damage tolerance, combining in-plane residual stresses and tailored microstructures in the different layers. Templated alumina layers embedded within a fine-grained alumina matrix are sintered using a pressureless spark plasma sintering (SPS) setup. The microstructure evolution of the individual layer regions is investigated under different sintering conditions. An optimal combination of highly textured internal layers with sharp interfaces and fine-grained alumina is found for heating rates of 100 degrees C min-1, maximum sintering temperature of 1600 degrees C, and 30 min dwell time. Hertzian contact and thermal shock experiments performed in selected rapid sintered samples show crack arrest and crack deflection in the textured layers, as found in conventionally sintered bio-inspired alumina ceramics. The successful rapid sintering of alumina-based multi-materials opens the path for further improvement in terms of reliability and damage tolerance in ceramic components.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20504 - Ceramics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of the American Ceramic Society

ISSN

0002-7820

e-ISSN

1551-2916

Svazek periodika

2

Číslo periodika v rámci svazku

28.5.2025

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

15

Strana od-do

—

Kód UT WoS článku

001498042600001

EID výsledku v databázi Scopus

2-s2.0-105007037646