Longitudinal cross-section microstructure of growth striation in Al2O3/Y3Al5O12/ZrO2 directionally solidified eutectic ceramic prepared by laser floating zone

Kan Song; Jun Zhang; Xiaojiao Jia; Haijun Su; Lin Liu; Hengzhi Fu

doi:10.1016/j.jeurceramsoc.2012.12.003

Longitudinal cross-section microstructure of growth striation in Al₂O₃/Y₃Al₅O₁₂/ZrO₂ directionally solidified eutectic ceramic prepared by laser floating zone

Kan Song, Jun Zhang, Xiaojiao Jia, Haijun Su, Lin Liu, Hengzhi Fu

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

Periodic growth striations with a width of 380μm are observed in Al₂O₃/Y₃Al₅O₁₂/ZrO₂ ternary directionally solidified eutectic ceramic prepared by laser floating zone. It is found that the microstructure of the growth striations exhibits disparate growth characteristics. The direct experimental evidence of the formation of the microstructure of the growth striations is obtained through examining the solid-liquid interface. The lamellar coarsening of the growth striations is related to the nucleation of Al₂O₃ particles and their engulfment by the extended Y₃Al₅O₁₂ phase. The mechanism accounting for this phenomenon is explained by considering eutectic growth behavior under mutative condition induced by oscillatory convection.

Original language	English
Pages (from-to)	1123-1128
Number of pages	6
Journal	Journal of the European Ceramic Society
Volume	33
Issue number	6
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2012.12.003
State	Published - Jun 2013

Keywords

AlO/YAlO/ZrO
Directionally solidified eutectic ceramic
Growth striation
Laser floating zone
Microstructure

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10.1016/j.jeurceramsoc.2012.12.003

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title = "Longitudinal cross-section microstructure of growth striation in Al2O3/Y3Al5O12/ZrO2 directionally solidified eutectic ceramic prepared by laser floating zone",

abstract = "Periodic growth striations with a width of 380μm are observed in Al2O3/Y3Al5O12/ZrO2 ternary directionally solidified eutectic ceramic prepared by laser floating zone. It is found that the microstructure of the growth striations exhibits disparate growth characteristics. The direct experimental evidence of the formation of the microstructure of the growth striations is obtained through examining the solid-liquid interface. The lamellar coarsening of the growth striations is related to the nucleation of Al2O3 particles and their engulfment by the extended Y3Al5O12 phase. The mechanism accounting for this phenomenon is explained by considering eutectic growth behavior under mutative condition induced by oscillatory convection.",

keywords = "AlO/YAlO/ZrO, Directionally solidified eutectic ceramic, Growth striation, Laser floating zone, Microstructure",

author = "Kan Song and Jun Zhang and Xiaojiao Jia and Haijun Su and Lin Liu and Hengzhi Fu",

year = "2013",

month = jun,

doi = "10.1016/j.jeurceramsoc.2012.12.003",

language = "英语",

volume = "33",

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journal = "Journal of the European Ceramic Society",

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TY - JOUR

T1 - Longitudinal cross-section microstructure of growth striation in Al2O3/Y3Al5O12/ZrO2 directionally solidified eutectic ceramic prepared by laser floating zone

AU - Song, Kan

AU - Zhang, Jun

AU - Jia, Xiaojiao

AU - Su, Haijun

AU - Liu, Lin

AU - Fu, Hengzhi

PY - 2013/6

Y1 - 2013/6

N2 - Periodic growth striations with a width of 380μm are observed in Al2O3/Y3Al5O12/ZrO2 ternary directionally solidified eutectic ceramic prepared by laser floating zone. It is found that the microstructure of the growth striations exhibits disparate growth characteristics. The direct experimental evidence of the formation of the microstructure of the growth striations is obtained through examining the solid-liquid interface. The lamellar coarsening of the growth striations is related to the nucleation of Al2O3 particles and their engulfment by the extended Y3Al5O12 phase. The mechanism accounting for this phenomenon is explained by considering eutectic growth behavior under mutative condition induced by oscillatory convection.

AB - Periodic growth striations with a width of 380μm are observed in Al2O3/Y3Al5O12/ZrO2 ternary directionally solidified eutectic ceramic prepared by laser floating zone. It is found that the microstructure of the growth striations exhibits disparate growth characteristics. The direct experimental evidence of the formation of the microstructure of the growth striations is obtained through examining the solid-liquid interface. The lamellar coarsening of the growth striations is related to the nucleation of Al2O3 particles and their engulfment by the extended Y3Al5O12 phase. The mechanism accounting for this phenomenon is explained by considering eutectic growth behavior under mutative condition induced by oscillatory convection.

KW - AlO/YAlO/ZrO

KW - Directionally solidified eutectic ceramic

KW - Growth striation

KW - Laser floating zone

KW - Microstructure

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DO - 10.1016/j.jeurceramsoc.2012.12.003

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SN - 0955-2219

VL - 33

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Longitudinal cross-section microstructure of growth striation in Al₂O₃/Y₃Al₅O₁₂/ZrO₂ directionally solidified eutectic ceramic prepared by laser floating zone

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Keywords

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