Microstructure Evolution of Melt-grown Al2O3/ZrO2/YAG Eutectic Ceramic by High Temperature Fused Method

Xue Song Fu; Wei Tao Sun; Wen Bo Han; Kang Li; Guo Qing Chen; Wen Long Zhou

doi:10.11868/j.issn.1001-4381.2015.000555

Microstructure Evolution of Melt-grown Al₂O₃/ZrO₂/YAG Eutectic Ceramic by High Temperature Fused Method

Xue Song Fu
, Wei Tao Sun
, Wen Bo Han
, Kang Li
, Guo Qing Chen^*
, Wen Long Zhou

^*Corresponding author for this work

School of Astronautics

Dalian University of Technology

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

1 Scopus citations

Abstract

As ultra-high-temperature structural materials, the mechanical properties of eutectic oxide ceramics are closely related with microstructure characteristics. Melt-grown Al₂O₃/ZrO₂/YAG eutectic ceramic was prepared by high temperature fused method. Effect of melt temperature and crystal seed on solidification microstructure evolution was investigated, the structure evolution mechanism was discussed using the classical nucleation mechanism and Jack-hunt mode. Experiment results show the phase composition of solidified samples changes from α-Al₂O₃/c-ZrO₂/YAG to α-Al₂O₃/c-ZrO₂/YAP as the melt temperature increases from 1750℃ to 2000℃. And the solidification microstructure evolves as follows: non-eutectic ceramic Al₂O₃/ZrO₂/YAG, irregular eutectic ceramic Al₂O₃/ZrO₂/YAG, nano-scale regular fibrous pattern eutectic Al₂O₃/ZrO₂/YAG, and complex coarse metastable composite ceramic Al₂O₃/ZrO₂/YAP. Analysis shows that microstructure evolution is resulted from heterogeneous passivation with elevating temperature followed by variations of nucleation undercooling and solidification path. Therefore, choosing reasonable melt temperature and crystal seed are the key rules to control the microstructure of Al₂O₃/ZrO₂/YAG eutectic ceramic.

Original language	English
Pages (from-to)	46-53
Number of pages	8
Journal	Journal of Materials Engineering
Volume	45
Issue number	2
DOIs	https://doi.org/10.11868/j.issn.1001-4381.2015.000555
State	Published - 20 Feb 2017

Keywords

Eutectic ceramic
High temperature fused method
Passivation
Solidification microstructure
Undercooling

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@article{ffb18a7b5ccb431aaf8c6de1e3206122,

title = "Microstructure Evolution of Melt-grown Al2O3/ZrO2/YAG Eutectic Ceramic by High Temperature Fused Method",

abstract = "As ultra-high-temperature structural materials, the mechanical properties of eutectic oxide ceramics are closely related with microstructure characteristics. Melt-grown Al2O3/ZrO2/YAG eutectic ceramic was prepared by high temperature fused method. Effect of melt temperature and crystal seed on solidification microstructure evolution was investigated, the structure evolution mechanism was discussed using the classical nucleation mechanism and Jack-hunt mode. Experiment results show the phase composition of solidified samples changes from α-Al2O3/c-ZrO2/YAG to α-Al2O3/c-ZrO2/YAP as the melt temperature increases from 1750℃ to 2000℃. And the solidification microstructure evolves as follows: non-eutectic ceramic Al2O3/ZrO2/YAG, irregular eutectic ceramic Al2O3/ZrO2/YAG, nano-scale regular fibrous pattern eutectic Al2O3/ZrO2/YAG, and complex coarse metastable composite ceramic Al2O3/ZrO2/YAP. Analysis shows that microstructure evolution is resulted from heterogeneous passivation with elevating temperature followed by variations of nucleation undercooling and solidification path. Therefore, choosing reasonable melt temperature and crystal seed are the key rules to control the microstructure of Al2O3/ZrO2/YAG eutectic ceramic.",

keywords = "Eutectic ceramic, High temperature fused method, Passivation, Solidification microstructure, Undercooling",

author = "Fu, \{Xue Song\} and Sun, \{Wei Tao\} and Han, \{Wen Bo\} and Kang Li and Chen, \{Guo Qing\} and Zhou, \{Wen Long\}",

year = "2017",

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doi = "10.11868/j.issn.1001-4381.2015.000555",

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journal = "Journal of Materials Engineering",

issn = "1001-4381",

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T1 - Microstructure Evolution of Melt-grown Al2O3/ZrO2/YAG Eutectic Ceramic by High Temperature Fused Method

AU - Fu, Xue Song

AU - Sun, Wei Tao

AU - Han, Wen Bo

AU - Li, Kang

AU - Chen, Guo Qing

AU - Zhou, Wen Long

PY - 2017/2/20

Y1 - 2017/2/20

N2 - As ultra-high-temperature structural materials, the mechanical properties of eutectic oxide ceramics are closely related with microstructure characteristics. Melt-grown Al2O3/ZrO2/YAG eutectic ceramic was prepared by high temperature fused method. Effect of melt temperature and crystal seed on solidification microstructure evolution was investigated, the structure evolution mechanism was discussed using the classical nucleation mechanism and Jack-hunt mode. Experiment results show the phase composition of solidified samples changes from α-Al2O3/c-ZrO2/YAG to α-Al2O3/c-ZrO2/YAP as the melt temperature increases from 1750℃ to 2000℃. And the solidification microstructure evolves as follows: non-eutectic ceramic Al2O3/ZrO2/YAG, irregular eutectic ceramic Al2O3/ZrO2/YAG, nano-scale regular fibrous pattern eutectic Al2O3/ZrO2/YAG, and complex coarse metastable composite ceramic Al2O3/ZrO2/YAP. Analysis shows that microstructure evolution is resulted from heterogeneous passivation with elevating temperature followed by variations of nucleation undercooling and solidification path. Therefore, choosing reasonable melt temperature and crystal seed are the key rules to control the microstructure of Al2O3/ZrO2/YAG eutectic ceramic.

AB - As ultra-high-temperature structural materials, the mechanical properties of eutectic oxide ceramics are closely related with microstructure characteristics. Melt-grown Al2O3/ZrO2/YAG eutectic ceramic was prepared by high temperature fused method. Effect of melt temperature and crystal seed on solidification microstructure evolution was investigated, the structure evolution mechanism was discussed using the classical nucleation mechanism and Jack-hunt mode. Experiment results show the phase composition of solidified samples changes from α-Al2O3/c-ZrO2/YAG to α-Al2O3/c-ZrO2/YAP as the melt temperature increases from 1750℃ to 2000℃. And the solidification microstructure evolves as follows: non-eutectic ceramic Al2O3/ZrO2/YAG, irregular eutectic ceramic Al2O3/ZrO2/YAG, nano-scale regular fibrous pattern eutectic Al2O3/ZrO2/YAG, and complex coarse metastable composite ceramic Al2O3/ZrO2/YAP. Analysis shows that microstructure evolution is resulted from heterogeneous passivation with elevating temperature followed by variations of nucleation undercooling and solidification path. Therefore, choosing reasonable melt temperature and crystal seed are the key rules to control the microstructure of Al2O3/ZrO2/YAG eutectic ceramic.

KW - Eutectic ceramic

KW - High temperature fused method

KW - Passivation

KW - Solidification microstructure

KW - Undercooling

UR - https://www.scopus.com/pages/publications/85019552247

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M3 - 文章

AN - SCOPUS:85019552247

SN - 1001-4381

VL - 45

SP - 46

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JO - Journal of Materials Engineering

JF - Journal of Materials Engineering

IS - 2

ER -

Microstructure Evolution of Melt-grown Al₂O₃/ZrO₂/YAG Eutectic Ceramic by High Temperature Fused Method

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