First electron spectroscopic imaging experiments on the new JEOL 2010 FEF

Joachim Mayer, Syo Matsumura, Yoshitsugu Tomokiyo

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The new JEOL 2010 FEF is a field emission gun TEM equipped with an Omega energy filter which is integrated in the projector lens system of the instrument. In the present study, the performance of the instrument in the analysis of elemental distributions by means of electron spectroscopic imaging was evaluated. Two systems were chosen: (i) Ca-doped Si 3 N 4 ceramics, in which the Ca segregation in the grain boundary films and triple junctions was investigated, and (ii) the 27R polytypoid in Al 9 O 3 N 7 , in which an attempt to image the chemical modulation of the oxygen content within the structural unit cell was made. The results on the Si 3 N 4 ceramics prove that Ca shows a strong tendency to segregate to the interface between the amorphous oxide phase and the Si 3 N 4 grains. Our findings support the model of an electrical double layer giving rise to the dissipative force which widens the grain boundary film thickness with increasing Ca-content. In the Al 9 O 3 N 7 material the expected modulation of the oxygen content with a periodicity of 2.4 nm could be verified by electron spectroscopic imaging. It can be concluded that oxygen partly segregates to the planar inversion domain boundaries, whereas the remainder of the oxygen content is homogeneously distributed on the anion sites.

Original languageEnglish
Pages (from-to)283-291
Number of pages9
JournalJournal of Electron Microscopy
Volume47
Issue number4
DOIs
Publication statusPublished - Jan 1 1998

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Energy-Filtering Transmission Electron Microscopy
Oxygen
Imaging techniques
Electrons
Ceramics
oxygen
Grain boundaries
electrons
grain boundaries
Experiments
Modulation
ceramics
modulation
Firearms
Periodicity
projectors
Field emission
Oxides
Lenses
Anions

All Science Journal Classification (ASJC) codes

  • Instrumentation

Cite this

First electron spectroscopic imaging experiments on the new JEOL 2010 FEF. / Mayer, Joachim; Matsumura, Syo; Tomokiyo, Yoshitsugu.

In: Journal of Electron Microscopy, Vol. 47, No. 4, 01.01.1998, p. 283-291.

Research output: Contribution to journalArticle

Mayer, Joachim ; Matsumura, Syo ; Tomokiyo, Yoshitsugu. / First electron spectroscopic imaging experiments on the new JEOL 2010 FEF. In: Journal of Electron Microscopy. 1998 ; Vol. 47, No. 4. pp. 283-291.
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