Effect of Dilution and Porosity on Self-Propagating High-Temperature Synthesis of Silicon Nitride

• Published in: Journal of the American Ceramic Society Vol. 85; no. 9; pp. 2209 - 2211
• Main Authors: Cano, Irene G., Borovinskaya, Inna P., Rodriguez, Miguel A., Grachev, Vladimir V.
• Format: Journal Article
• Language: English
• Published: Westerville, Ohio American Ceramics Society 01.09.2002; Blackwell; Wiley Subscription Services, Inc
• Subjects: Chemistry; Elements and non-metal compounds (oxides, hydroxides, hydrides, sulfides, carbides, ...); Exact sciences and technology; Inorganic chemistry and origins of life; Pores/porosity; Preparations and properties; Self-propagating high-temperature synthesis; Silicon nitride; Combustion synthesis; Dilution; Chemical preparation; Silicon Nitrides; Self propagating high temperature synthesis; Porosity; Experimental study
• ISSN: 0002-7820; 1551-2916
• DOI: 10.1111/j.1151-2916.2002.tb00436.x

Self‐propagating high‐temperature synthesis is a very easy and low‐cost method to synthesize Si3N4. The nitriding of silicon powder takes place in a self‐sustained regime under high pressures of nitrogen with dilution of silicon by Si3N4. In this work effects of dilution and green‐mixture porosity on combustion velocity and phase content of reaction products are studied. Results are compared with previous work of other authors and different behaviors are found. An explanation of these behaviors is given.