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Nitriding study of titanium silicide intermetallics obtained by mechanical alloying
Instituto de Ciencia de Materiales de Sevilla.
Instituto de Ciencia de Materiales de Sevilla.
Instituto de Ciencia de Materiales de Sevilla.
Instituto de Ciencia de Materiales de Sevilla.
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2008 (English)In: Intermetallics (Barking), ISSN 0966-9795, E-ISSN 1879-0216, Vol. 16, no 8, 948-954 p.Article in journal (Refereed) Published
Abstract [en]

 Titanium and silicon powder blends were ball-milled under an inert atmosphere and subsequently annealed in a nitrogen atmosphere. Ti62.5Si37.5, Ti55.6Si44.4, and Ti50Si50 mixtures suffered a mechanically induced self-propagating reaction during milling. The products of the combustion were Ti5Si3 for the Ti62.5Si37.5 mixture and a combination of intermetallic phases for the Ti55.6Si44.4 and Ti50Si50 mixtures. The Ti33.3Si66.7 blend did not show an MSR process, but prolonged milling allowed the formation of a mixture of stable C54-TiSi2 and metastable C49-TiSi2 by a diffusion reaction. The nitriding study showed a different behaviour for C54-TiSi2 and Ti5Si3. C54-TiSi2 nitriding took place in a two-step process: the first corresponded to the formation of TiN and Si and the second to the silicon nitriding leading to the formation of a- and b-Si3N4. However, silicon and titanium nitriding primarily occurred simultaneously during the annealing of Ti5Si3, and the final product was a mixture of TiN and a-Si3N4.

Place, publisher, year, edition, pages
2008. Vol. 16, no 8, 948-954 p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:liu:diva-44674DOI: 10.1016/j.intermet.2008.04.009Local ID: 77267OAI: oai:DiVA.org:liu-44674DiVA: diva2:265536
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2017-12-13Bibliographically approved

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Cordoba Gallego, Jose Manuel

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