Nitriding study of titanium silicide intermetallics obtained by mechanical alloying
2008 (English)In: Intermetallics (Barking), ISSN 0966-9795, Vol. 16, no 8, 948-954 p.Article in journal (Refereed) Published
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.
IdentifiersURN: urn:nbn:se:liu:diva-44674DOI: 10.1016/j.intermet.2008.04.009Local ID: 77267OAI: oai:DiVA.org:liu-44674DiVA: diva2:265536