Microstructure and fracture toughness of directionally solidified Al2O3/Y3 Al5O12(YAG) eutectic by laser zone melting

Hai Jun Su; Jun Zhang; Lin Liu; Heng Zhi Fu

Microstructure and fracture toughness of directionally solidified Al₂O₃/Y₃ Al₅O₁₂(YAG) eutectic by laser zone melting

Hai Jun Su, Jun Zhang, Lin Liu, Heng Zhi Fu

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

5 Scopus citations

Abstract

Al₂O₃/Y₃ Al₅O₁₂(YAG) eutectic ceramic was prepared from melt by laser-zone-melting with directional solidification technique to study the relationship between the eutectic microstructure and the processing parameters, and its mechanical property was investigated as well. The analysis results show that the scanning rate and power density strongly affect the eutectic microstructure. With the processing parameters adjusted properly, the binary Al₂O₃/YAG has a uniform and homogeneous lamella microstructure, in which single-crystal Al₂O₃and single-crystal YAG are three-dimensionally and continuously reticularly connected and finely coupled without grain boundaries, colonies and amorphous phases between interfaces. Eutectic spacing is only around 1-2 μm and is diminished with the scanning rate' s increasing. The maximum hardness reaches 19.5 GPa and the fracture toughness at room temperature is attained for 3.6 MPa·m^1/2 by Vickers indentation method.

Original language	English
Pages (from-to)	741-745
Number of pages	5
Journal	Cailiao Kexue yu Gongyi/Material Science and Technology
Volume	15
Issue number	6
State	Published - Dec 2007

Keywords

AlO/Y AlO(YAG)
Eutectic ceramic in-situ composite
Laser zone melting

Cite this

@article{7fc7ff48f34445b99bf36dc8392c6d39,

title = "Microstructure and fracture toughness of directionally solidified Al2O3/Y3 Al5O12(YAG) eutectic by laser zone melting",

abstract = "Al2O3/Y3 Al5O12(YAG) eutectic ceramic was prepared from melt by laser-zone-melting with directional solidification technique to study the relationship between the eutectic microstructure and the processing parameters, and its mechanical property was investigated as well. The analysis results show that the scanning rate and power density strongly affect the eutectic microstructure. With the processing parameters adjusted properly, the binary Al2O3/YAG has a uniform and homogeneous lamella microstructure, in which single-crystal Al2O3and single-crystal YAG are three-dimensionally and continuously reticularly connected and finely coupled without grain boundaries, colonies and amorphous phases between interfaces. Eutectic spacing is only around 1-2 μm and is diminished with the scanning rate' s increasing. The maximum hardness reaches 19.5 GPa and the fracture toughness at room temperature is attained for 3.6 MPa·m1/2 by Vickers indentation method.",

keywords = "AlO/Y AlO(YAG), Eutectic ceramic in-situ composite, Laser zone melting",

author = "Su, {Hai Jun} and Jun Zhang and Lin Liu and Fu, {Heng Zhi}",

year = "2007",

month = dec,

language = "英语",

volume = "15",

pages = "741--745",

journal = "Cailiao Kexue yu Gongyi/Material Science and Technology",

issn = "1005-0299",

publisher = "Harbin Institute of Technology",

number = "6",

}

TY - JOUR

T1 - Microstructure and fracture toughness of directionally solidified Al2O3/Y3 Al5O12(YAG) eutectic by laser zone melting

AU - Su, Hai Jun

AU - Zhang, Jun

AU - Liu, Lin

AU - Fu, Heng Zhi

PY - 2007/12

Y1 - 2007/12

N2 - Al2O3/Y3 Al5O12(YAG) eutectic ceramic was prepared from melt by laser-zone-melting with directional solidification technique to study the relationship between the eutectic microstructure and the processing parameters, and its mechanical property was investigated as well. The analysis results show that the scanning rate and power density strongly affect the eutectic microstructure. With the processing parameters adjusted properly, the binary Al2O3/YAG has a uniform and homogeneous lamella microstructure, in which single-crystal Al2O3and single-crystal YAG are three-dimensionally and continuously reticularly connected and finely coupled without grain boundaries, colonies and amorphous phases between interfaces. Eutectic spacing is only around 1-2 μm and is diminished with the scanning rate' s increasing. The maximum hardness reaches 19.5 GPa and the fracture toughness at room temperature is attained for 3.6 MPa·m1/2 by Vickers indentation method.

AB - Al2O3/Y3 Al5O12(YAG) eutectic ceramic was prepared from melt by laser-zone-melting with directional solidification technique to study the relationship between the eutectic microstructure and the processing parameters, and its mechanical property was investigated as well. The analysis results show that the scanning rate and power density strongly affect the eutectic microstructure. With the processing parameters adjusted properly, the binary Al2O3/YAG has a uniform and homogeneous lamella microstructure, in which single-crystal Al2O3and single-crystal YAG are three-dimensionally and continuously reticularly connected and finely coupled without grain boundaries, colonies and amorphous phases between interfaces. Eutectic spacing is only around 1-2 μm and is diminished with the scanning rate' s increasing. The maximum hardness reaches 19.5 GPa and the fracture toughness at room temperature is attained for 3.6 MPa·m1/2 by Vickers indentation method.

KW - AlO/Y AlO(YAG)

KW - Eutectic ceramic in-situ composite

KW - Laser zone melting

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M3 - 文章

AN - SCOPUS:38949216769

SN - 1005-0299

VL - 15

SP - 741

EP - 745

JO - Cailiao Kexue yu Gongyi/Material Science and Technology

JF - Cailiao Kexue yu Gongyi/Material Science and Technology

IS - 6

ER -

Microstructure and fracture toughness of directionally solidified Al₂O₃/Y₃ Al₅O₁₂(YAG) eutectic by laser zone melting

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