Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1475278 | Journal of the European Ceramic Society | 2012 | 5 Pages |
Abstract
The behavior of alumina nano-particles taken from a commercial powder is investigated during in situ compression experiments in a transmission electron microscope (TEM). Small particles of 40 nm in diameter can undergo severe plastic deformation without failure, whereas brittle fracture is observed for 120 nm sized nano-particles. This is evidence of a critical size under which alumina, at least in the form of nano-particles, cannot be considered as brittle materials even at room temperature and a direct observation of the grinding limit generally observed during ball milling.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Emilie Calvié, Lucile Joly-Pottuz, Claude Esnouf, Philippe Clément, Vincent Garnier, Jérôme Chevalier, Yves Jorand, Annie Malchère, Thierry Epicier, Karine Masenelli-Varlot,