Real time TEM observation of alumina ceramic nano-particles during compression

Emilie Calvié, Lucile Joly-Pottuz, Claude Esnouf, Philippe Clément, Vincent Garnier, Jérôme Chevalier, Yves Jorand, Annie Malchère, Thierry Epicier, Karine Masenelli-Varlot

Research output: Contribution to journalArticle

28 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)2067-2071
Number of pages5
JournalJournal of the European Ceramic Society
Volume32
Issue number10
DOIs
Publication statusPublished - 2012 Aug 1
Externally publishedYes

Keywords

  • Ceramics
  • Compression
  • In situ
  • Nano-particles
  • Transmission electron microscopy

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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