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Effect of mechanically activated raw materials on β-sialon formation by combustion synthesis

Published online by Cambridge University Press:  31 January 2011

Ramasamy Sivakumar ,
Kazuhiko Aoyagi  and
Tomohiro Akiyama
Ramasamy Sivakumar*
Affiliation:
Center for Advanced Research of Energy Conversion Materials, Hokkaido University, Sapporo 060-8628, Japan
Kazuhiko Aoyagi
Affiliation:
Center for Advanced Research of Energy Conversion Materials, Hokkaido University, Sapporo 060-8628, Japan
Tomohiro Akiyama
Affiliation:
Center for Advanced Research of Energy Conversion Materials, Hokkaido University, Sapporo 060-8628, Japan
*
a)Address all correspondence to this author. e-mail: siva@eng.hokudai.ac.jp
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Abstract

The influence of different raw material mixtures on β-sialon (Si6−zAlzOzN8−z, 1 ⩽ z ⩽ 4) formation through mechanical activation coupled combustion synthesis (MA-CS) was investigated in low nitriding atmosphere of 1 MPa without diluent inclusions. The MA-CS performed for the first time on sialon raw materials with milling time of 18 min obtained sialons more than three times as pure as those obtained by CS of mixtures ball milled to 1 h (z = 3). The starting materials containing silicon, aluminum, and alumina (z = 4) after MA-CS had an increment of sialon amounts up to 88 mass%.

Keywords

Combustion synthesis (SHS)Mechanical alloyingX-ray diffraction (XRD)
Type
Articles
Information
Journal of Materials Research , Volume 22 , Issue 10 , October 2007 , pp. 2863 - 2867
Copyright
Copyright © Materials Research Society 2007

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References

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