Vliv chemického složení na optické vlastnosti a lomovou houževnatost spinelu na bázi oxidů hořečnatého a hlinitého

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F05%3A00026209" target="_blank" >RIV/68081723:_____/05:00026209 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Effect of Chemical Composition on the Optical Properties and Fracture Toughness of Transparent Magnesium Aluminate Spinel Cerami

Popis výsledku v původním jazyce

Transparent magnesium aluminate spinel ceramics were fabricated by two stage consolidation process composed of hot-pressing and hot isostatic pressing starting from commercially available powders. Light reflection and transmission behaviors of fabricatedceramics were determined in the UV/visible and near-IR wavelength regions. The ceramic with a MgO to Al2O3 molar ratio of 1:1.5 revealed a relatively poor optical transparency due to pronounced light scattering at the microcracked grain boundaries. Theother compositions revealed a high degree of transparency. The effect of chemical composition on fracture toughness of spinel was investigated by indentation and chevron notch fracture toughness measurement techniques. It was found that grain boundary microcracking was decisive in determining the fracture toughness of the fabricated spinel ceramics. The spinel with a MgO to Al2O3 molar ratio of 1:2 revealed the highest plain strain fracture toughness with a mean value of 2.02 MPa.m1/2.

Název v anglickém jazyce

Effect of Chemical Composition on the Optical Properties and Fracture Toughness of Transparent Magnesium Aluminate Spinel Cerami

Popis výsledku anglicky

Transparent magnesium aluminate spinel ceramics were fabricated by two stage consolidation process composed of hot-pressing and hot isostatic pressing starting from commercially available powders. Light reflection and transmission behaviors of fabricatedceramics were determined in the UV/visible and near-IR wavelength regions. The ceramic with a MgO to Al2O3 molar ratio of 1:1.5 revealed a relatively poor optical transparency due to pronounced light scattering at the microcracked grain boundaries. Theother compositions revealed a high degree of transparency. The effect of chemical composition on fracture toughness of spinel was investigated by indentation and chevron notch fracture toughness measurement techniques. It was found that grain boundary microcracking was decisive in determining the fracture toughness of the fabricated spinel ceramics. The spinel with a MgO to Al2O3 molar ratio of 1:2 revealed the highest plain strain fracture toughness with a mean value of 2.02 MPa.m1/2.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JH - Keramika, žáruvzdorné materiály a skla

OECD FORD obor

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Projekt

<a href="/cs/project/IAA2041003" target="_blank" >IAA2041003: Mikromechanika křehkého lomu a statistické modely</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2005

Kód důvěrnosti údajů

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

Název periodika

Materials Transactions

ISSN

1345-9678

e-ISSN

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Svazek periodika

46

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

JP - Japonsko

Počet stran výsledku

8

Strana od-do

996-1003

Kód UT WoS článku

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EID výsledku v databázi Scopus

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