Fabrication of bulk amorphous and nanocrystalline Al2O3-YSZ materials

被引：1
作者：
Song, Xuemei [1 ]
Liu, Ziwei [1 ]
Kong, Mingguang [2 ]
Wang, Yongzhe [1 ]
Huang, Liping [3 ]
Zheng, Xuebin [3 ]
Zeng, Yi [1 ,4 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
[2] Chinese Acad Sci, Inst Solid State Phys, Phys Mat Lab, Hefei 230031, Peoples R China
[3] Chinese Acad Sci, Shanghai Inst Ceram, Lab Inorgan Coating Mat, Shanghai 200050, Peoples R China
[4] Chinese Acad Sci, Ctr Excellence Superconducting Elect CENSE, Shanghai 200050, Peoples R China
来源：
MATERIALS LETTERS | 2017年 / 196卷
关键词：
Al2O3-YSZ; APS; Amorphous; Annealing temperature; Nanocrystalline; ALUMINA;
D O I：
10.1016/j.matlet.2017.03.048
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This study reports a simple method for the preparation of bulk amorphous materials by rapid solidification of their crystalline powders. Bulk amorphous Al2O3-YSZ materials have been successfully prepared by atmospheric plasma spraying (APS) using Al2O3-YSZ mixed crystalline powders near eutectic composition. Nano-crystalline Al2O3-YSZ materials with homogeneous nanostructure were achieved by heat treating bulk amorphous Al2O3-YSZ materials at 1050 degrees C. When annealing temperature was above 1250 degrees C, the lotus leaf structure was formed because of connection between large numbers of Al2O3 nano-grains due to sintering. Therefore, it can be concluded that annealing temperature of amorphous Al2O3-YSZ materials need to be controlled between T-c (onset crystallization temperature) and 1250 degrees C avoiding large area of sintering to achieve homogeneous nanocrystalline ceramics. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：187 / 190
页数：4
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