Internal oxidation of Cu-Fe; 1: Small angle x-ray scattering study of oxide precipitation

Journal Article · Wed Jun 01 04:00:00 EDT 1994 · Acta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-7151(94)90026-4· OSTI ID:7086472

Paris, O; Fratzl, P; Langmayr, F; Vogl, G ^[1]; Haubold, H G ^[2]

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1. Universitaet Wien (Austria). Inst. fuer Festkoerperphysik
2. Forschungszentrum Juelich GmbH (Germany)

The combination of 3D-small-angle X-ray scattering, anomalous small-angle X-ray scattering and X-ray diffraction was used to characterize the nature and morphology of iron-oxide precipitates formed by internal oxidation of Cu-Fe single crystals. Two types of iron-oxides with spinel structure were identified. The first type, Fe[sub 3]O[sub 4] (90% of the total amount of precipitates), forms plates on [111]-planes of the copper lattice, whereas the other, with a composition close to [gamma]-Fe[sub 2]O[sub 3], forms plates on [100]-planes. The occurrence of plate-like precipitates on well defined habit planes is attributed to the large elastic misfit between matrix and precipitates. The fact that two oxides with very similar structure grow on different habit planes is interpreted as a bifurcation between two possible orientation relations during nucleation of the oxide.

• OSTI ID: 7086472
• Journal Information: Acta Metallurgica et Materialia; (United States), Journal Name: Acta Metallurgica et Materialia; (United States) Vol. 42:6; ISSN 0956-7151; ISSN AMATEB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
CHALCOGENIDES
CHEMICAL REACTIONS
COPPER ALLOYS
DATA
EXPERIMENTAL DATA
GRAIN ORIENTATION
INFORMATION
IRON ALLOYS
IRON COMPOUNDS
IRON OXIDES
MICROSTRUCTURE
MORPHOLOGY
NUMERICAL DATA
ORIENTATION
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PRECIPITATION
SEPARATION PROCESSES
TRANSITION ELEMENT COMPOUNDS