# Investigations of iron-alumina metal-ceramic composites: Effect of ruthenium and nickel on the hydrogen reduction of trivalent iron during the formation of the composite

Verelst, M and Kannan, KR and Subbanna, GN and Rao, CNR (1993) Investigations of iron-alumina metal-ceramic composites: Effect of ruthenium and nickel on the hydrogen reduction of trivalent iron during the formation of the composite. In: Materials Research Bulletin, 28 (4). pp. 293-303.

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## Abstract

Effect of ruthenium and nickel on the reduction behavlor of $Fe^{3+}/AI_20_3$ to give the $Fe-AI_20_3$ metal-ceramic composite has been studied by employing x-ray diffraction, $^{57}Fe$ M$\H{o}$ssbauer spectroscopy and electron microscopy. Both ruthenium and nickel promote the hydrogen reduction of $Fe^{3+}$ , giving nearly total reduction to the metallic phase at 1220K. Besides metallic iron in the ferromagnetic $\alpha$-form, paramagnetic alloys of Fe with Ru and Ni are formed during the reduction.

Item Type: Journal Article Copyright of this article belongs to Elsevier. Iron;Alumina;Composites Division of Chemical Sciences > Solid State & Structural Chemistry Unit 14 Nov 2006 19 Sep 2010 04:31 http://eprints.iisc.ernet.in/id/eprint/8356