| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5463177 | Materials Letters | 2017 | 10 Pages |
Abstract
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 °C. When annealing temperature was above 1250 °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 Tc (onset crystallization temperature) and 1250 °C avoiding large area of sintering to achieve homogeneous nanocrystalline ceramics.
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Xuemei Song, Ziwei Liu, Mingguang Kong, Yongzhe Wang, Liping Huang, Xuebin Zheng, Yi Zeng,