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Titolo:
MICROSTRUCTURE OF (FE0.2CO0.8)(0.8)(FE2.38CO0.62O4) - A MAGNETIC OXIDATION-RESISTANT COMPOSITE FORMED BY COPRECIPITATION
Autore:
YAMEGNINOUBEYO JC; POURROY G; WERCKMANN J; RIERA AMI; EHRET G; POIX P;
Indirizzi:
INST PHYS & CHIM MAT STRASBOURG,5 RUE UNIV F-67084 STRASBOURG FRANCE
Titolo Testata:
Journal of the American Ceramic Society
fascicolo: 8, volume: 79, anno: 1996,
pagine: 2027 - 2032
SICI:
0002-7820(1996)79:8<2027:MO(-AM>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
FERRITE COMPOSITE; SPINEL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
12
Recensione:
Indirizzi per estratti:
Citazione:
J.C. Yamegninoubeyo et al., "MICROSTRUCTURE OF (FE0.2CO0.8)(0.8)(FE2.38CO0.62O4) - A MAGNETIC OXIDATION-RESISTANT COMPOSITE FORMED BY COPRECIPITATION", Journal of the American Ceramic Society, 79(8), 1996, pp. 2027-2032

Abstract

The metal-ferrite composite (Fe0.2Co0.8)(0.8)(Fe2.38Co0.62O4) has been studied by X-ray diffractometry measurements and high-resolution transmission electron microscopy. Spinel ferrite occurs in highly crystalline domains 100-150 nm in size, and the iron-cobalt alloy occurs in smaller and less-crystalline domains (10-20 nm). Both phases are heterogeneous in composition. The metal is embedded in the spinel phase, located near the edges, and overlaid by a poorly crystallized layer or misshapen regions containing small spinel crystals and amorphous phases. By annealing under vacuum up to 800 degrees C, the misshapen regions disappear and the size of the metallic regions increases. The concentration of iron in the metallic regions decreases and their structure changes to face-centered cubic, while the spinel becomes enriched in iron.

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Documento generato il 28/11/20 alle ore 09:47:57