Scratch-induced deformation in fine- and ultrafine-grained bulk alumina
Scratch-induced deformation in fine- and ultrafine-grained bulk alumina
复制标题
DOI：
10.1016/j.scriptamat.2010.05.023
复制
发表时间：
2010-09
影响因子：
6
通讯作者：
Lin Huang;Zhihui Zhang;Yonghao Zhao;W. Yao;A. Mukherjee;J. Schoenung
中科院分区：
文献类型：
--
作者：
Lin Huang;Zhihui Zhang;Yonghao Zhao;W. Yao;A. Mukherjee;J. Schoenung
The nanoscratch behavior of two bulk α-alumina samples with 1.3μm and 290nm 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.
