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http://dx.doi.org/10.4191/KCERS.2007.44.6.338

Effect of Si/Si3N4 Ratio on the Microstructure and Properties of Porous Silicon Nitrilde Prepared by SHS Methode  

Kim, Dong-Baek (Department of Materials Science and Engineering, Changwon National University)
Park, Dong-Soo (Department of Future Technology, Korea Institute of Machinery and Materials)
Hahn, Byung-Dong (Department of Future Technology, Korea Institute of Machinery and Materials)
Jung, Yeon-Gil (Department of Materials Science and Engineering, Changwon National University)
Publication Information
Journal of the Korean Ceramic Society / v.44, no.6, 2007 , pp. 338-342 More about this Journal
Abstract
Porous silicon nitride ceramics were prepared by SHS (Self-Propagating High Temperature Synthesis) from silicon powder, silicon nitride powder and pore-forming precursor. The microstructure, porosity and the flexural strength of the porous silicon nitride ceramics were varied according to the Si/Si3N4 ratio, size and amount of the pore-forming precursors. Some sample exhibited as high flexural strength as $162{\pm}24\;MPa$. The high strength is considered to result from the fine pore size and the strong bonding amoung the silicon nitride particles.
Keywords
SHS; Porous ceramics; $Si_3N_4$; Si;
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