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Preparation, microstructures, and mechanical properties of directionally solidified Al2O3/Lu3Al5O12 eutectic ceramics
Sun, Haofei1,2; Zhou, Cui1,3; Du, Tiefeng1; Wu, Zhen1; Xian, Quangang1; Sun, Luchao1; Liu, Jing2; Wang, Jingyang1
Corresponding AuthorSun, Luchao(lcsun@imr.ac.cn) ; Wang, Jingyang(jywang@imr.ac.cn)
2021-10-27
Source PublicationINTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
ISSN1546-542X
Pages8
AbstractAl2O3/Lu3Al5O12 (LuAG) directionally solidified eutectic (DSE) ceramics with two solidification rates were prepared utilizing optical floating zone (OFZ) technique. The microstructures (eutectic morphology, preferred growth direction and interface orientation) of Al2O3/LuAG were characterized, and the mechanical properties (Vickers hardness and fracture toughness) were compared with those of Al2O3/REAG (RE = Y, Er, and Yb). Results show that Al2O3/LuAG with solidification rate of 30 mm/h has established preferred growth direction in both Al2O3 and LuAG phases with cellular eutectic structures. While Al2O3/LuAG with solidification rate of 10 mm/h only shows preferred growth direction in Al2O3 phase and presents degenerate irregular eutectic microstructures. Besides, Al2O3/LuAG exhibits higher hardness compared with Al2O3/REAG (RE = Y, Er, and Yb). In addition, a special attention is focused on the relations among rare earth ionic radius, eutectic microstructures, and mechanical properties of these DSE ceramics. It is demonstrated that a smaller rare earth ionic radius could lead to larger eutectic interspacing as well as higher Vickers hardness of DSE Al2O3/REAG, revealing the possibility and feasibility of microstructure control and mechanical properties optimization for DSE Al2O3/REAG ceramics by tailoring the rare earth elements.
Keyworddirectional solidification eutectic oxides mechanical properties microstructures
Funding OrganizationNatural Science Foundation of Liaoning Province ; National Science andTechnology Major Project ; International Cooperation Key Program ; Liao Ning Revitalization Talents Program
DOI10.1111/ijac.13936
Indexed BySCI
Language英语
Funding ProjectNatural Science Foundation of Liaoning Province[2020MS-006] ; National Science andTechnology Major Project[2017-VI-0020-0093] ; International Cooperation Key Program[174321KYSB20180008] ; Liao Ning Revitalization Talents Program[XLYC2002018]
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Ceramics
WOS IDWOS:000711811600001
PublisherWILEY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/167095
Collection中国科学院金属研究所
Corresponding AuthorSun, Luchao; Wang, Jingyang
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
2.Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB, Canada
3.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang, Peoples R China
Recommended Citation
GB/T 7714
Sun, Haofei,Zhou, Cui,Du, Tiefeng,et al. Preparation, microstructures, and mechanical properties of directionally solidified Al2O3/Lu3Al5O12 eutectic ceramics[J]. INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY,2021:8.
APA Sun, Haofei.,Zhou, Cui.,Du, Tiefeng.,Wu, Zhen.,Xian, Quangang.,...&Wang, Jingyang.(2021).Preparation, microstructures, and mechanical properties of directionally solidified Al2O3/Lu3Al5O12 eutectic ceramics.INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY,8.
MLA Sun, Haofei,et al."Preparation, microstructures, and mechanical properties of directionally solidified Al2O3/Lu3Al5O12 eutectic ceramics".INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY (2021):8.
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