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Properties of Si3N4-TiN composites fabricated by spark plasma sintering by using a mixture of Si3N4 and Ti powders

Ahmad, Norhayati and H., Sueyoshi (2010) Properties of Si3N4-TiN composites fabricated by spark plasma sintering by using a mixture of Si3N4 and Ti powders. Ceramics International, 36 (2). 491 - 496. ISSN 0272-8842

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Official URL: http://dx.doi.org/10.1016/j.ceramint.2009.09.029

Abstract

Si3N4–TiNcomposites were successfully fabricated via planetary ball milling of 70 mass% Si3N4 and 30 mass% Tipowders, followed by sparkplasmasintering (SPS) at 1250–1350 °C. The sintering mechanism for SPS was a hybrid of dissolution–reprecipitation and viscous flow. The electrical resistivity decreased with increasing sintering temperature up to a minimum at 1250 °C and then increased with the increasing sintering temperature. The composites prepared by SPS at 1250–1350 °C could be easily machined by electrical discharge machining. Composite prepared by SPS at 1300 °C showed a high hardness (17.78 GPa) and a good machinability.

Item Type:Article
Uncontrolled Keywords:C. electrical conductivity, C. mechanical properties, D. Si3N4, sparkplasmasintering
Subjects:T Technology > TJ Mechanical engineering and machinery
Divisions:Mechanical Engineering
ID Code:26592
Deposited By: Liza Porijo
Deposited On:18 Jul 2012 03:27
Last Modified:06 Aug 2012 03:56

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