High-temperature mechanical behavior of partially sintered ceramics
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F23%3A43926318" target="_blank" >RIV/60461373:22310/23:43926318 - isvavai.cz</a>
Výsledek na webu
<a href="https://link.springer.com/article/10.1007/s10853-023-08382-x" target="_blank" >https://link.springer.com/article/10.1007/s10853-023-08382-x</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10853-023-08382-x" target="_blank" >10.1007/s10853-023-08382-x</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
High-temperature mechanical behavior of partially sintered ceramics
Popis výsledku v původním jazyce
The high-temperature mechanical behavior (elastic properties, fracture strength, and degree of irreversible deformation) of partially sintered alumina and zirconia ceramics with different porosities and degrees of sintering was evaluated by (static) three-point bending tests at 1100 °C, from which load–deflection curves were obtained. Furthermore, the elastic modulus obtained from these curves was compared to Young’s modulus as measured via the impulse excitation technique. Bar-shaped specimens were prepared by uniaxial pressing and sintering at 1100, 1200, 1300 and 1400 °C for 2 h, and subsequently characterized via bulk density measurements, total porosity calculations and electron scanning microscopy analysis. The effects caused by progressive sintering and the occurrence of irreversible deformation due to the weak bonds (small sinter necks) between particles affected the values of the static elastic modulus, which resulted in values quite lower than those obtained by the impulse excitation technique. A very good correlation described with a power-law relationship was obtained between both type of modulus, dynamic and static one, in the whole range of sintering temperatures for the two evaluated porous ceramics. In particular, the very fine (nanocrystalline) grain size and the tendency to agglomerate of the zirconia powder facilitated the irreversible deformation by grain boundary sliding.
Název v anglickém jazyce
High-temperature mechanical behavior of partially sintered ceramics
Popis výsledku anglicky
The high-temperature mechanical behavior (elastic properties, fracture strength, and degree of irreversible deformation) of partially sintered alumina and zirconia ceramics with different porosities and degrees of sintering was evaluated by (static) three-point bending tests at 1100 °C, from which load–deflection curves were obtained. Furthermore, the elastic modulus obtained from these curves was compared to Young’s modulus as measured via the impulse excitation technique. Bar-shaped specimens were prepared by uniaxial pressing and sintering at 1100, 1200, 1300 and 1400 °C for 2 h, and subsequently characterized via bulk density measurements, total porosity calculations and electron scanning microscopy analysis. The effects caused by progressive sintering and the occurrence of irreversible deformation due to the weak bonds (small sinter necks) between particles affected the values of the static elastic modulus, which resulted in values quite lower than those obtained by the impulse excitation technique. A very good correlation described with a power-law relationship was obtained between both type of modulus, dynamic and static one, in the whole range of sintering temperatures for the two evaluated porous ceramics. In particular, the very fine (nanocrystalline) grain size and the tendency to agglomerate of the zirconia powder facilitated the irreversible deformation by grain boundary sliding.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
20504 - Ceramics
Návaznosti výsledku
Projekt
—
Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2023
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Journal of Materials Science
ISSN
0022-2461
e-ISSN
1573-4803
Svazek periodika
58
Číslo periodika v rámci svazku
12
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
11
Strana od-do
5208-5218
Kód UT WoS článku
000952928800002
EID výsledku v databázi Scopus
2-s2.0-85150210061