| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1630532 | Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material | 2007 | 5 Pages |
Abstract
With the help of scanning electronic microscopy and X-ray diffraction, the relationships of microstructure characteristics, phase assemblage, and fracture micrograph of Al2O3/ZrO2 laminated ceramics were studied. Compared with monolithic Al2O3/ZrO2 ceramics, the existence of surface compressive stresses greatly restrained the growth of ZrO2 and Al2O3 grains at high sinter temperature, fined the grain size, and increased the content of metastable t-ZrO2, which made the fracture transformation energy quantity 70% higher than that of the monolithic ceramics. The trans-granular and inter-granular fracture features were observed in the surface and center layers, which further verified that transformation toughening is the main mechanism, whereas, micro-crack toughening is helpful for enhancing fracture toughness.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Bei Chen, Chuan Cheng, Lan Xiong, Li-Ao Wang,