Amorphous metallic powders prepared by chemical reduction of metal ions with potassium borohydride in aqueous solution

Corrias, A. and Ennas, G. and Licheri, G. and Marongiu, G. and Paschina, G. (1990) Amorphous metallic powders prepared by chemical reduction of metal ions with potassium borohydride in aqueous solution. Chemistry of Materials, 2 (4). pp. 363-366. ISSN 0897-4756. (doi:https://doi.org/10.1021/cm00010a010) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Official URL
http://dx.doi.org/10.1021/cm00010a010

Abstract

Amorphous metal-metalloid powders have been prepared by chemical reduction of Fe2+, Co2+, and Ni2+ ions with potassium borohydride in aqueous solution. The chemical composition of the samples, TM-B-O, varies with the metal and with the preparation steps. The as-prepared Co-B-O and Ni-B-O samples are definitely amorphous, while the Fe-B-O sample mainly consists of bcc α-Fe. Crystallization of the samples through thermal treatment has been investigated by X-ray diffraction. The Co-B-O sample evolves toward fee metallic cobalt accompanied first by metastable o-Co3B and, at high temperature, by t-Co2B. The Ni-B-O sample gives rise to fee metallic Ni and o-Ni3B, which decomposes at higher temperatures. Iron borides are not detected in the thermal treatment of the Fe-B-O sample. No evidence of metal oxides is present in all the samples, thus suggesting the prevalent bonding of oxygen to boron.

Item Type: Article
Subjects: Q Science > QC Physics > QC176.8.N35 Nanoscience, nanotechnology
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Anna Corrias
Date Deposited: 17 Dec 2014 12:07 UTC
Last Modified: 04 Dec 2017 12:54 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/46250 (The current URI for this page, for reference purposes)
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