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Title: Towards atomic scale engineering of rare-earth-doped SiAlON ceramics through aberration-corrected scanning transmission electron microscopy

Abstract

Direct visualization of rare earths in {alpha}- and {beta}-SiAlON unit-cells is performed through Z-contrast imaging technique in an aberration-corrected scanning transmission electron microscope. The preferential occupation of Yb and Ce atoms in different interstitial locations of {beta}-SiAlON lattice is demonstrated, yielding higher solubility for Yb than Ce. The triangular-like host sites in {alpha}-SiAlON unit cell accommodate more Ce atoms than hexagonal sites in {beta}-SiAlON. We think that our results will be applicable as guidelines for many kinds of rare-earth-doped materials.

Authors:
 [1];  [2];  [2];  [1]
  1. Anadolu University, Eskisehir, Turkey
  2. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Shared Research Equipment Collaborative Research Center
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1025871
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Scripta Materialia; Journal Volume: 65; Journal Issue: 8
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM OXIDES; ATOMS; CERAMICS; ELECTRON MICROSCOPES; INTERSTITIALS; MICROSCOPY; OCCUPATIONS; RARE EARTHS; RECOMMENDATIONS; SILICON NITRIDES; SOLUBILITY; TRANSMISSION ELECTRON MICROSCOPY

Citation Formats

Yurdakul, Hilmi, Idrobo Tapia, Juan C, Pennycook, Stephen J, and Turan, S. Towards atomic scale engineering of rare-earth-doped SiAlON ceramics through aberration-corrected scanning transmission electron microscopy. United States: N. p., 2011. Web. doi:10.1016/j.scriptamat.2011.06.038.
Yurdakul, Hilmi, Idrobo Tapia, Juan C, Pennycook, Stephen J, & Turan, S. Towards atomic scale engineering of rare-earth-doped SiAlON ceramics through aberration-corrected scanning transmission electron microscopy. United States. doi:10.1016/j.scriptamat.2011.06.038.
Yurdakul, Hilmi, Idrobo Tapia, Juan C, Pennycook, Stephen J, and Turan, S. Sat . "Towards atomic scale engineering of rare-earth-doped SiAlON ceramics through aberration-corrected scanning transmission electron microscopy". United States. doi:10.1016/j.scriptamat.2011.06.038.
@article{osti_1025871,
title = {Towards atomic scale engineering of rare-earth-doped SiAlON ceramics through aberration-corrected scanning transmission electron microscopy},
author = {Yurdakul, Hilmi and Idrobo Tapia, Juan C and Pennycook, Stephen J and Turan, S},
abstractNote = {Direct visualization of rare earths in {alpha}- and {beta}-SiAlON unit-cells is performed through Z-contrast imaging technique in an aberration-corrected scanning transmission electron microscope. The preferential occupation of Yb and Ce atoms in different interstitial locations of {beta}-SiAlON lattice is demonstrated, yielding higher solubility for Yb than Ce. The triangular-like host sites in {alpha}-SiAlON unit cell accommodate more Ce atoms than hexagonal sites in {beta}-SiAlON. We think that our results will be applicable as guidelines for many kinds of rare-earth-doped materials.},
doi = {10.1016/j.scriptamat.2011.06.038},
journal = {Scripta Materialia},
number = 8,
volume = 65,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 2011},
month = {Sat Jan 01 00:00:00 EST 2011}
}