Real time TEM observation of alumina ceramic nano-particles during compression
- 作者：Emilie Calvié ; Lucile Joly-Pottuz ; Lucile.Joly-Pottuz@insa-lyon.fr ; Claude Esnouf ; Philippe Clé ; ment ; Vincent Garnier ; Jé ; rô ; me Chevalier ; Yves Jorand ; Annie Malchè ; re ; Thierry Epicier ; Karine Masenelli-Varlot
- 关键词：Nano-particles ; Ceramics ; Compression ; Transmission electron microscopy ; In situ
- 刊名：Journal of the European Ceramic Society
- 出版年：2012
- 期刊代码：53_09552219
- 类别：ms
- 出版时间：August, 2012
- 卷：32
- 期：10
- 页码：2067-2071
- 文件大小：563 K
摘要
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.