Callaghan Innovation Research Papers

Back to Research Papers

TitleSynthesis and properties of new β-Sialon/TiN composites via a novel AlxTiy intermediate
Publication TypeJournal Article
Year of Publication2016
AuthorsCalloch, P., Brown I.W.M., Mackenzie K.J.D., Hanna J.V., and Rees G.J.
JournalCeramics International
Pagination2330 - 2338
Date Published2016
ISSN02728842 (ISSN)
KeywordsAluminium particles, Aluminium powder, aluminum, Aluminum nitride, Elastic moduli, Fracture toughness, Inert atmospheres, Mechanical properties, Nanosized titania, nitrogen, Reaction bonding, Sialon, Sintering, Sol-gel process, Sol-gels, Tensile strength, Thermal shock resistance, Tin, Titanium aluminides, Titanium compounds, titanium dioxide, Titanium nitride, Yttrium oxide
AbstractA new synthesis of β-Sialon/TiN composites by reaction bonding of aluminium powder coated with nanosized titania is reported. A sol-gel method was used to coat the aluminium particles with titania and the resulting powder was calcined in an inert atmosphere to produce a TixAly-Al2O3 composite which was heat-treated in nitrogen to form an AlN-Al2O3-TiN composite. After addition of a suitable silicon phase and yttrium oxide as a nitridation and sintering aid, a β-Sialon/TiN composite was formed by reaction bonding under nitrogen. Young's modulus, hardness, fracture toughness, tensile strength and thermal shock resistance of the new composites were measured and compared with a standard β-Sialon fabricated by reaction bonding of Al2O3, AlN and Si under similar conditions. © 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

Back to top