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Title: High-resolution chemical analysis by STEM-EELS of nanosized oxide particles in a mechanically-alloyed FeCrAl intermetallic

Abstract

The chemical composition of nanosized oxides has been analysed in a mechanically-alloyed (MA) iron–chromium–aluminium intermetallic containing yttria additions using an aberration-corrected, high-resolution scanning transmission electron microscope (STEM). The oxide particles are seen to contain yttrium and oxygen only, but very little of the matrix metallic elements, while the matrix in the immediate vicinity shows a very low iron content. Possible reasons for the change of matrix composition outside the particle-matrix interface are discussed. - Highlights: • High-resolution chemical analysis of oxide particles was performed using STEM-EELS. • Oxide particles contain Y and O but essentially no elements from the Fe–Cr–Al matrix. • The matrix immediately outside the particles appears to be depleted in Fe. • Diffusion of Y during particle growth possibly transports vacancies to the interface.

Authors:
;
Publication Date:
OSTI Identifier:
22476089
Resource Type:
Journal Article
Journal Name:
Materials Characterization
Additional Journal Information:
Journal Volume: 103; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1044-5803
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM COMPOUNDS; CHEMICAL ANALYSIS; CHROMIUM COMPOUNDS; DIFFUSION; DISPERSIONS; INTERFACES; INTERMETALLIC COMPOUNDS; IRON COMPOUNDS; NANOSTRUCTURES; RESOLUTION; TRANSMISSION ELECTRON MICROSCOPY; YTTRIUM OXIDES

Citation Formats

Morris, D.G., E-mail: david.morris@cenim.csic.es, and Muñoz-Morris, M.A. High-resolution chemical analysis by STEM-EELS of nanosized oxide particles in a mechanically-alloyed FeCrAl intermetallic. United States: N. p., 2015. Web. doi:10.1016/J.MATCHAR.2015.03.023.
Morris, D.G., E-mail: david.morris@cenim.csic.es, & Muñoz-Morris, M.A. High-resolution chemical analysis by STEM-EELS of nanosized oxide particles in a mechanically-alloyed FeCrAl intermetallic. United States. doi:10.1016/J.MATCHAR.2015.03.023.
Morris, D.G., E-mail: david.morris@cenim.csic.es, and Muñoz-Morris, M.A. Fri . "High-resolution chemical analysis by STEM-EELS of nanosized oxide particles in a mechanically-alloyed FeCrAl intermetallic". United States. doi:10.1016/J.MATCHAR.2015.03.023.
@article{osti_22476089,
title = {High-resolution chemical analysis by STEM-EELS of nanosized oxide particles in a mechanically-alloyed FeCrAl intermetallic},
author = {Morris, D.G., E-mail: david.morris@cenim.csic.es and Muñoz-Morris, M.A.},
abstractNote = {The chemical composition of nanosized oxides has been analysed in a mechanically-alloyed (MA) iron–chromium–aluminium intermetallic containing yttria additions using an aberration-corrected, high-resolution scanning transmission electron microscope (STEM). The oxide particles are seen to contain yttrium and oxygen only, but very little of the matrix metallic elements, while the matrix in the immediate vicinity shows a very low iron content. Possible reasons for the change of matrix composition outside the particle-matrix interface are discussed. - Highlights: • High-resolution chemical analysis of oxide particles was performed using STEM-EELS. • Oxide particles contain Y and O but essentially no elements from the Fe–Cr–Al matrix. • The matrix immediately outside the particles appears to be depleted in Fe. • Diffusion of Y during particle growth possibly transports vacancies to the interface.},
doi = {10.1016/J.MATCHAR.2015.03.023},
journal = {Materials Characterization},
issn = {1044-5803},
number = ,
volume = 103,
place = {United States},
year = {2015},
month = {5}
}