ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
A combined XRD, Mössbauer, SEM, STXM and NMR study of naturally oxidised, ballmilled iron powders is presented. The XRD patterns show the peaks of the bcc-Fe phase with theline widths increasing with the milling time. This corresponds to a flattening of the crystallites, asconfirmed by SEM, and increased strain due to the accumulation of defects. The effect is consistentwith the variation of the Mössbauer line-widths with the milling time. Scanning Transmission XrayMicroscopy (STXM) measurements provided oxygen maps of the particles and revealed that thedominant oxide in the nanometric oxide layer is magnetite. The 57Fe spin echo NMR study reveals adominant signal corresponding to a bcc-Fe core and a much weaker resonance corresponding to amagnetite amount of less than 1%
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.140.47.pdf
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