In:
Advanced Engineering Forum, Trans Tech Publications, Ltd., Vol. 13 ( 2015-6), p. 3-8
Abstract:
Fe/Fe 2 O 3 composite powders were obtained by mechanical milling of iron and hematite up to 120 minutes in a high energy planetary ball mill. The particles size decreases by mechanical milling upon the formation of the Fe/Fe 2 O 3 composite particles. After 120 minutes of milling the median particles size is at 7.2 μm. The Fe/Fe 3 O 4 type composite were obtained by reactive sintering in argon atmosphere at 1100 °C of the Fe/Fe 2 O 3 composite powders milled for 60 and 120 minutes. After sintering a FeO-wüstite residual phase is formed and this phase is eliminated by applying a subsequent annealing at a temperature of 550 °C. The sintered compact before and after annealing is composed by a quasi-continuous iron matrix in which are embedded iron oxides clusters (Fe 3 O 4 and FeO before annealing and Fe 3 O 4 after annealing). The iron oxide clusters are analogous with the Widmanstatten structure observed in steels before and after annealing. The materials have been investigated using laser particle size analysis, optical microscopy, scanning electron microscopy, energy dispersive X-ray spectrometry and X-ray diffraction.
Type of Medium:
Online Resource
ISSN:
2234-991X
DOI:
10.4028/www.scientific.net/AEF.13
DOI:
10.4028/www.scientific.net/AEF.13.3
Language:
Unknown
Publisher:
Trans Tech Publications, Ltd.
Publication Date:
2015
detail.hit.zdb_id:
2694532-0
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