Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1581178 | Materials Science and Engineering: A | 2009 | 4 Pages |
Abstract
It is well-known that one of the principal difficulties which limit the development of ceramics is their intrinsically brittle nature. In this work we were interested to the study of the single crystal alumina tenacity measured by the Vickers indentation technique in the aim to highlight certain factors responsible for this brittleness. After having defined a reliable protocol of measurement on pure sapphire, we studied the effect on tenacity of the structural defects introduced into the same single crystal by friction and by both X-rays and UV irradiations. The obtained results reveal the importance of these defects which behave, in this case, like trapping sites of electric charges and affect in an important way tenacity of material.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
N. Boukheit, A. Karaali, A. Touil, K. Mirouh, D. Tréheux,