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、*

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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Optical micrographs of the directionally solidified eutectics(a) Al2O3/ErAG; (b) Al2O3/YbAG

1. Optical micrographs of the directionally solidified eutectics(a) Al₂O₃/ErAG; (b) Al₂O₃/YbAG

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XRD patterns of the directionally solidified eutectics(a) Al2O3/ErAG; (b) Al2O3/YbAG

2. XRD patterns of the directionally solidified eutectics(a) Al₂O₃/ErAG; (b) Al₂O₃/YbAG

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3. SEM morphologies of the transverse section of directionally solidified eutectics(a) Al₂O₃/ErAG; (b) Al₂O₃/YbAG

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4. EBSD maps and corresponding inverse pole figures (inserts) of Al₂O₃/ErAG ((a) Al₂O₃ and (b) ErAG) and Al₂O₃/YbAG ((c) Al₂O₃ and (d) YbAG)

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5. Pole figures of Al₂O₃/ErAG: (a) Al₂O₃ in {0001} orientation and (b) ErAG in {211} orientation corresponding to the inverse pole figures in Fig. 4 (a) and (b)

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6. 3D-XRT images of directionally solidified (a) Al₂O₃/ErAG and (d) Al₂O₃/YbAG eutectics, (b, c) spatial distribution of ErAG and Al₂O₃ in Al₂O₃/ErAG, (e, f) spatial distribution of YbAG and Al₂O₃ in Al₂O₃/YbAG

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$Vickers hardness and fracture toughness of directionally solidified eutectics for Al2O3/ErAG and Al2O3/YbAG$

7. Vickers hardness and fracture toughness of directionally solidified eutectics for Al₂O₃/ErAG and Al₂O₃/YbAG

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Eutectic system	Growth method	Growth directions	Orientation relationships
Al₂O₃/ErAG	OFZ	<$10\bar{1}0$> Al₂O₃//<111> ErAG	{0001} Al₂O₃//{211} ErAG
Al₂O₃/REAG	OFZ	<$10\bar{1}0$> Al₂O₃//<101> REAG	{0001} Al₂O₃//{211} REAG
RE=Er/Yb^[24]	OFZ	<$10\bar{1}0$> Al₂O₃//<$2\bar{1}0$> REAG	{0001} Al₂O₃//{211} REAG
Al₂O₃/YAG^[25]	OFZ	<$10\bar{1}0$> Al₂O₃//<101> YAG	{0001} Al₂O₃//{211} YAG
Al₂O₃/YAG^[26]	LFZ	<$1\bar{1}00$> Al₂O₃//<111> YAG	{0001} Al₂O₃//{$1\bar{1}2$} YAG
Al₂O₃/YAG^[27]	Bridgman	<$1\bar{1}20$> Al₂O₃//<110> YAG	-
Al₂O₃/YAG^[27]	Bridgman	<$01\bar{1}0$> Al₂O₃//<110> YAG	-
Al₂O₃/YAG^[28]	LSP	<$10\bar{1}0$> Al₂O₃//<101> YAG	{0001} Al₂O₃//{211} YAG

Table 1.

Growth directions and orientation relationships of some eutectic ceramics

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Eutectic system	Preparation method	Vickers hardness /GPa	Fracture toughness /(MPa·m^1/2)
Al₂O₃/ErAG	OFZ	(13.5±0.4)	(3.0 ± 0.2)
Al₂O₃/YbAG	OFZ	(12.8±0.1)	(3.2 ± 0.1)
Al₂O₃/ErAG^[9]	LFZ	(14.5-16.0)	1.9
Al₂O₃/ErAG^[19]	LFZ	(14.9±0.7)	(1.8 ± 0.3)
Al₂O₃/YbAG^[19]	LFZ	(14.8±0.6)	(2.2 ± 0.5)
Al₂O₃/YAG^[24]	OFZ	13.5	(3.1±0.3)