Manufacture and Compositional Analysis of Silicon Nitride Composites with Different Carbon Additions
Manufacture and Compositional Analysis of Silicon Nitride Composites with Different Carbon Additions
Author(s): Csaba Balázsi, Ferenc Wéber, Zsolt KasztovszkySubject(s): Methodology and research technology
Published by: Žilinská univerzita v Žilině
Keywords: Silicon Nitride Composites; Different Carbon Additions; Manufacture and Compositional Analysis;
Summary/Abstract: Carbon black and graphite nano/micrograins and sintering additives (Al2O3 and Y2O3) were added to silicon nitride starting powder. These mixtures were mechanochemically activated several hours in a planetary type alumina ball-mill in order to achieve a homogenous mass. As an alternative to nano- and micrograins, carbon fibres were added to carbon free silicon nitride batches. After dry pressing of rectangular bars sinter-HIP was applied. Structural, morphological and compositional analyses were performed on as-prepared samples. Bending strength and elastic modulus were found to be influenced by amount of carbon black and graphite introduced in silicon nitride matrix.
Journal: Komunikácie - vedecké listy Žilinskej univerzity v Žiline
- Issue Year: 6/2004
- Issue No: 1
- Page Range: 5-9
- Page Count: 5
- Language: English