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Comparison of Silicon Nitrides with Carbon Additions Prepared by Two Different Sintering Methods

Journal Key Engineering Materials (Volume 290)
Volume Fractography of Advanced Ceramics II
Edited by J. Dusza, R. Danzer and R. Morrell
Pages 242-245
DOI 10.4028/www.scientific.net/KEM.290.242
Citation Csaba Balázsi et al., 2005, Key Engineering Materials, 290, 242
Online since July, 2005
Authors Csaba Balázsi, E. Dolekcekic, Zsuzsanna Kövér, Ferenc Wéber, Stuart Hampshire, Péter Arató
Keywords Bioceramic, Mechanical Properties, Porosity
Abstract

In this work partially and fully densified silicon nitride based composites have been prepared using carbon black and graphite additions. Alumina and yttria sintering additives were also added to silicon nitride starting powders. Sinter-HIP and pressure-less sintering (PLS) have been employed for composite processing. The effects of carbon nano- and micro-grains on the microstructure, bending strength and hardness have been investigated. Higher strengths could be achieved by HIP, whereas more homogeneous properties can be assured by PLS.

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