| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1501038 | Scripta Materialia | 2010 | 4 Pages |
Abstract
The nanoscratch behavior of two bulk α-alumina samples with 1.3 μm and 290 nm average grain sizes, respectively, was investigated using a nanoindenter in scratch mode, in combination with atomic force and scanning electron microscopy. A ductile to brittle transition was observed in the fine-grained sample, while the ultrafine-grained sample exhibited predominantly ductile deformation with a fish-bone feature indicative of a stick–slip mechanism. These findings suggest that grain refinement can increase the potential for plastic deformation in ceramics.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Lin Huang, Zhihui Zhang, Yonghao Zhao, Wenlong Yao, Amiya K. Mukherjee, Julie M. Schoenung,