| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 11006834 | Optical Materials | 2018 | 8 Pages |
Abstract
Highly transparent MgAlON ceramics were fabricated by pressureless presintering and hot isostatic pressing. The deformation, hardness and fracture toughness of MgAlON transparent ceramics have been studied by nanoindentation technique. The indentation tests were performed with applied loads of 2-400â¯mN to investigate the variation in mechanical behaviors. It was found that the plastic deformation component dominated MgAlON ceramics at the applied loads from 2â¯mN to 200â¯mN. The resistance to plastic deformation decreased when the applied load increased. However, the micro-cracks induced by nanoindentation have been observed at the load above 200â¯mN. In addition, the true hardness (â¼13.5â¯GPa) was determined based on the proportional sample resistance (PSR). Furthermore, the fracture toughness (2.2-2.7â¯MPaâ¯m1/2) was evaluated using Laugier's equation. This study lends credible the realization of mechanical properties of the MgAlON transparent ceramics in the design and practical applications.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Benyuan Ma, Wei Zhang, Yuezhong Wang, Haizhi Song, Xiumin Xie, Zhibin Zhang, Chao Yao, Hui Luo, Ruihua Niu,