Počet záznamů: 1
Effect of Chemical Composition on the Optical Properties and Fracture Toughness of Transparent Magnesium Aluminate Spinel Cerami
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SYSNO ASEP 0026209 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Ostatní články Název Effect of Chemical Composition on the Optical Properties and Fracture Toughness of Transparent Magnesium Aluminate Spinel Cerami Překlad názvu Vliv chemického složení na optické vlastnosti a lomovou houževnatost spinelu na bázi oxidů hořečnatého a hlinitého Tvůrce(i) Dericioglu, A. F. (JP)
Boccaccini, A. R. (GB)
Dlouhý, Ivo (UFM-A) RID, ORCID
Kagawa, Y. (JP)Zdroj.dok. Materials Transactions. - : Japan Institute of Metals and Materials - ISSN 1345-9678
Roč. 46, č. 5 (2005), s. 996-1003Poč.str. 8 s. Jazyk dok. eng - angličtina Země vyd. JP - Japonsko Klíč. slova MgAl2O4 spinel ; optical properties ; fracture toughness Vědní obor RIV JH - Keramika, žáruvzdorné materiály a skla CEP IAA2041003 GA AV ČR - Akademie věd CEZ AV0Z2041904 - UFM-A AV0Z20410507 - UFM-A (2005-2011) Anotace 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 fabricated ceramics 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. The other 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. Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2006
Počet záznamů: 1