光悬浮区熔定向凝固Al2O3/Er3Al5O12和Al2O3/Yb3Al5O12共晶陶瓷的制备与性能研究

doi:10.15541/jim20200508

无机材料学报 ›› 2021, Vol. 36 ›› Issue (6): 652-658.DOI: 10.15541/jim20200508

所属专题：【结构材料】超高温结构陶瓷

光悬浮区熔定向凝固Al₂O₃/Er₃Al₅O₁₂和Al₂O₃/Yb₃Al₅O₁₂共晶陶瓷的制备与性能研究

孙鲁超¹(), 周翠¹^,², 杜铁锋¹, 吴贞¹, 雷一明¹^,², 李家麟¹, 苏海军³(), 王京阳¹()

1.中国科学院金属研究所, 沈阳 110016
2.中国科学技术大学材料科学与工程学院, 沈阳 110016
3.西北工业大学凝固技术国家重点实验室, 西安 710072

收稿日期:2020-09-01 修回日期:2020-09-29 出版日期:2021-06-20 网络出版日期:2020-10-10
通讯作者: 王京阳, 研究员. E-mail: jywang@imr.ac.cn; 苏海军, 教授. E-mail: shjnpu@nwpu.edu.cn
作者简介:孙鲁超(1984-), 男, 副研究员. E-mail: lcsun@imr.ac.cn

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

SUN Luchao¹(), ZHOU Cui¹^,², DU Tiefeng¹, WU Zhen¹, LEI Yiming¹^,², LI Jialin¹, SU Haijun³(), WANG Jingyang¹()

1. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
2. School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
3. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China

Received:2020-09-01 Revised:2020-09-29 Published:2021-06-20 Online:2020-10-10
Contact: WANG Jingyang, professor. E-mail: jywang@imr.ac.cn; SU Haijun, professor. E-mail: shjnpu@nwpu.edu.cn
About author:SUN Luchao(1984-), male, associate professor. E-mail: lcsun@imr.ac.cn
Supported by:
The State Key Laboratory of Solidification Processing (Northwestern Polytechnical University)(SKLSP201909);National Science and Technology Major Project(2017-VI-0020-0093);National Natural Science Foundation of China(51772302);International Cooperation Key Program(174321KYSB20180008)

摘要/Abstract

摘要：

本研究探索了光悬浮区熔法制备Al₂O₃/Er₃Al₅O₁₂(ErAG)和Al₂O₃/Yb₃Al₅O₁₂(YbAG) 定向凝固共晶陶瓷。在10 mm/h的抽拉速率下成功获得了凝固组织均匀、内部无裂纹或孔洞的高质量共晶陶瓷。通过高分辨三维X射线衍射仪研究了Al₂O₃和RE₃Al₅O₁₂在三维空间的分布与组织结构; 利用电子背散射衍射技术分析了定向凝固末期Al₂O₃和RE₃Al₅O₁₂两相的晶体学择优取向和相界面关系。力学性能表征结果显示, Al₂O₃/ErAG和Al₂O₃/YbAG具有优异的力学性能, 二者的维氏硬度分别为(13.5±0.4)和(12.8±0.1) GPa;断裂韧性分别为(3.0±0.2)和(3.2±0.1) MPa·m^1/2。

关键词: 定向凝固, 共晶陶瓷, 显微结构, 力学性能

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.

Key words: directional solidification, eutectic ceramic, microstructure, mechanical property

中图分类号:

TQ174

孙鲁超, 周翠, 杜铁锋, 吴贞, 雷一明, 李家麟, 苏海军, 王京阳. 光悬浮区熔定向凝固Al₂O₃/Er₃Al₅O₁₂和Al₂O₃/Yb₃Al₅O₁₂共晶陶瓷的制备与性能研究[J]. 无机材料学报, 2021, 36(6): 652-658.

SUN Luchao, ZHOU Cui, DU Tiefeng, WU Zhen, LEI Yiming, LI Jialin, SU Haijun, WANG Jingyang. Directionally Solidified Al₂O₃/Er₃Al₅O₁₂ and Al₂O₃/Yb₃Al₅O₁₂ Eutectic Ceramics Prepared by Optical Floating Zone Melting[J]. Journal of Inorganic Materials, 2021, 36(6): 652-658.

图/表 9

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

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

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

Fig. 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)

Fig. 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)

Table 1 Growth directions and orientation relationships of some eutectic ceramics

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

Fig. 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

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

Table 2 Comparison of Vickers hardness and fracture toughness of some Al2O3/REAG eutectic ceramics

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)

参考文献 29

[1]	WAKU Y, NAKAGAWA N, WAKAMOTO T, et al. High temperature strength and thermal stability of a unidirectionally solidified Al₂O₃/YAG eutectic composite. Journal of Materials Science, 1998,33:1217-1225. DOI URL
[2]	WAKU Y, NAKAGAWA N, WAKAMOTO T, et al. A ductile ceramic eutectic composite with high strength. Nature, 1997,389:49-52. DOI URL
[3]	LLORCA J, ORERA V M. Directionally solidified eutectic oxide ceramics. Progress in Materials Science, 2006,51:711-809. DOI URL
[4]	PASTOR J Y, LLORCA J, SALAZAR A, et al. Mechanical properties of melt-grown alumina-yttrium aluminum garnet eutectics up to 1900 K. Journal of the American Ceramic Society, 2005,88:1488-1495. DOI URL
[5]	OLIETE P B, PENA J I, LARREA A, et al. Ultra-high-strength nanofibrillar Al₂O₃-YAG-YSZ eutectics. Advanced Materials, 2007,19:2313-2318. DOI URL
[6]	ZHANG J, SU H J, SONG K, et al. Microstructure, growth mechanism and mechanical property of Al₂O₃-based eutectic ceramic in situ composites. Journal of the European Ceramic Society, 2011,31:1191-1198. DOI URL
[7]	WAKU Y, NAKAGAWA N, OHTSUBO H, et al. Fracture and deformation behaviour of melt growth composites at very high temperatures. Journal of Materials Science, 2001,36:1585-1594. DOI URL
[8]	MARTINEZ FERNANDEZ J, SAYIR A, FARMER S C. High temperature creep deformation of directionally solidified Al₂O₃/ Er₃Al₅O₁₂. Acta Materialia, 2003,51:1705-1720. DOI URL
[9]	MESA M C, OLIETE P B, ORERA V M, et al. Microstructure and mechanical properties of Al₂O₃/Er₃Al₅O₁₂ eutectic rods grown by the laser-heated floating zone method. Journal of the European Ceramic Society, 2011,31:1241-1250. DOI URL
[10]	MESA M C, OLIETE P B, LARREA A. Microstructural stability at elevated temperatures of directionally solidified Al₂O₃/Er₃Al₅O₁₂ eutectic ceramics. Journal of Crystal Growth, 2012,360:119-122. DOI URL
[11]	REN Q, SU H J, ZHANG J, et al. Microstructure control, competitive growth and precipitation rule in faceted Al₂O₃/Er₃Al₅O₁₂ eutectic in situ composite ceramics prepared by laser floating zone melting. Journal of the European Ceramic Society, 2019,39:1900-1908. DOI URL
[12]	REN Q, SU H J, ZHANG J, et al. Halo formation in directionally solidified Al₂O₃-Er₃Al₅O₁₂ off-eutectic in situ composite ceramics. Materials Characterization, 2019,150:31-37. DOI URL
[13]	REN Q, SU H J, ZHANG J, et al. Eutectic growth behavior with regular arrangement in the faceted Al₂O₃/Er₃Al₅O₁₂ irregular eutectic system at low growth rate. Scripta Materialia, 2019,162:49-53. DOI URL
[14]	REN Q, SU H J, ZHANG J, et al. Effect of an abrupt change in pulling rate on microstructures of directionally solidified Al₂O₃- Er₃Al₅O₁₂ eutectic and off-eutectic composite ceramics. Ceramics International, 2019,45:6632-6638. DOI URL
[15]	SAI H, YUGAMI H, NAKAMURA K, et al. Selective emission of Al₂O₃/Er₃Al₅O₁₂ eutectic composite for thermophotovoltaic generation of electricity. Japanese Journal of Applied Physics, 2000,39:1957-1961. DOI URL
[16]	ADACHI Y, YUGAMI H, SHIBATA K, et al. Compact TPV generation system using Al₂O₃/Er₃Al₅O₁₂ eutectic ceramics selective emitters. AIP Conference Proceedings, 2004,738:198-205.
[17]	NAKAGAWA N, OHTSUBO H, WAKU Y, et al. Thermal emission properties of Al₂O₃/Er₃Al₅O₁₂ eutectic ceramics. Journal of the European Ceramic Society, 2005,25:1285-1291. DOI URL
[18]	OLIETE P B, MESA M C, MERINO R I, et al. Directionally solidified Al₂O₃-Yb₃Al₅O₁₂ eutectics for selective emitters. Solar Energy Materials and Solar Cells, 2016,144:405-410. DOI URL
[19]	OLIETE P B, MANUEL J, ROBLEDO L, et al. Directionally solidified Al₂O₃-ME₃Al₅O₁₂( ME: Y, Er and Yb) eutectic coatings for thermophotovoltaic systems. Ceramics International, 2017,43:16270-16275.
[20]	LAKIZA S M. Directionally solidified eutectics in the Al₂O₃-ZrO₂- Ln(Y)₂O₃ systems. Powder Metallurgy and Metal Ceramics, 2009,48:1-2. DOI URL
[21]	YOSHIKAWA A, HASEGAWA K, LEE J H, et al. Phase identification of Al₂O₃/RE₃Al₅O₁₂ and Al₂O₃/REAlO₃(RE=Sm-Lu, Y) eutectics. Journal of Crystal Growth, 2000,218:67-73. DOI URL
[22]	ANSTIS G R, CHANTIKUL P, LAWN B R, et al. A critical- evaluation of indentation techniques for measuring fracture- toughness: I, direct crack measurements. Journal of the American Ceramic Society, 1981,64:533-538. DOI URL
[23]	WANG X, WANG J Y, SUN L C, et al. Microstructure evolution of Al₂O₃/Y₃Al₅O₁₂ eutectic crystal during directional solidification. Scripta Materialia, 2015,108:31-34. DOI URL
[24]	MAZEROLLES L, PERRIERE L, LARTIGUE-KORINEK S, et al. Microstructures, crystallography of interfaces, and creep behavior of melt-growth composites. Journal of the European Ceramic Society, 2008,28:2301-2308. DOI URL
[25]	WANG X, TIAN Z L, ZHANG W, et al. Mechanical properties of directionally solidified Al₂O₃/Y₃Al₅O₁₂ eutectic ceramic prepared by optical floating zone technique. Journal of the European Ceramic Society, 2018,38:3610-3617. DOI URL
[26]	FRAZER C S, DICKEY E C, SAYIR A. Crystallographic texture and orientation variants in Al₂O₃-Y₃Al₅O₁₂ directionally solidified eutectic crystals. Journal of Crystal Growth, 2001,233:187-195. DOI URL
[27]	SAKATA S, MITANI A, SHIMIZU K, et al. Crystallographic orientation analysis and high temperature strength of melt growth composite. Journal of the European Ceramic Society, 2005,25:1441-1445. DOI URL
[28]	SU H J, ZHANG J, MA W D, et al. In situ fabrication of highly-dense Al₂O₃/YAG nanoeutectic composite ceramics by a modified laser surface processing. Journal of the European Ceramic Society, 2014,34:739-744. DOI URL
[29]	WANG X, WANG D, ZHANG H, et al. Mechanism of eutectic growth in directional solidification of an Al₂O₃/Y₃Al₅O₁₂ crystal, Scripta Materialia, 2016,116:44-48. DOI URL

光悬浮区熔定向凝固Al₂O₃/Er₃Al₅O₁₂和Al₂O₃/Yb₃Al₅O₁₂共晶陶瓷的制备与性能研究

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

RichHTML

PDF (PC)