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

页码：187 / 190

页数：4