Directionally Solidified Al2O3/Er3Al5O12 and Al2O3/Yb3Al5O12 Eutectic Ceramics Prepared by Optical Floating Zone Melting

Luchao SUN; Cui ZHOU; Tiefeng DU; Zhen WU; Yiming LEI; Jialin LI; Haijun SU; Jingyang WANG

doi:10.15541/jim20200508

Journals >Journal of Inorganic Materials >Volume 36 >Issue 6 >Page 652 > Article

Journal of Inorganic Materials
Vol. 36, Issue 6, 652 (2021)

Directionally Solidified Al₂O₃/Er₃Al₅O₁₂ and Al₂O₃/Yb₃Al₅O₁₂ Eutectic Ceramics Prepared by Optical Floating Zone Melting

Luchao SUN¹, Cui ZHOU^1,2, Tiefeng DU¹, Zhen WU¹..., Yiming LEI^1,2, Jialin LI¹, Haijun SU^3,* and Jingyang WANG^1,*|Show fewer author(s)

Author Affiliations

¹1. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

²2. School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China

³3. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China

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DOI: 10.15541/jim20200508 Cite this Article

Luchao SUN, Cui ZHOU, Tiefeng DU, Zhen WU, Yiming LEI, Jialin LI, Haijun SU, Jingyang WANG. Directionally Solidified Al₂O₃/Er₃Al₅O₁₂ and Al₂O₃/Yb₃Al₅O₁₂ Eutectic Ceramics Prepared by Optical Floating Zone Melting[J]. Journal of Inorganic Materials, 2021, 36(6): 652 Copy Citation Text

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Abstract

Al₂O₃/Er₃Al₅O₁₂(ErAG) and Al₂O₃/Yb₃Al₅O₁₂(YbAG) eutectic rods with fine and homogeneous microstructure, free from cracks or pores, were directionally solidified using optical floating zone method at growth rate of 10 mm/h. The crystallographic orientation, preferred orientation, and 3D distribution of Al₂O₃ and Er₃Al₅O₁₂/Yb₃Al₅O₁₂phases in the terminal growth zone of Al₂O₃/ErAG and Al₂O₃/YbAG eutectics were investigated by EBSD and high-resolution X-ray microscope. Vickers hardness of the as-prepared Al₂O₃/ErAG and Al₂O₃/YbAG eutectics are determined as (13.5±0.4) and (12.8±0.1) GPa, respectively. The fracture toughness results of Al₂O₃/ErAG and Al₂O₃/YbAG are (3.0±0.2) and (3.2±0.1) MPa·m^1/2, respectively.

Keywords

directional solidification eutectic ceramic mechanical property microstructure

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