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Materials 2015, 8(11), 7549-7562;

Oxidation of Ca-α-SiAlON Powders Prepared by Combustion Synthesis

School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China
Department of Energy and Resources Engineering, College of Engineering, Peking University, Beijing 100871, China
School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
Author to whom correspondence should be addressed.
Academic Editor: Jai-Sung Lee
Received: 6 September 2015 / Revised: 22 October 2015 / Accepted: 30 October 2015 / Published: 11 November 2015
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The oxidation of Ca-α-SiAlON synthesized by the combustion synthesis (CS) method with different additives was investigated in air atmosphere using thermogravimetric (TG) analysis in a temperature range from 1453 K to 1653 K. The experimental results indicated that oxidation was controlled by mixed chemical and diffusion steps. The oxidation products by XRD analysis were composed of SiO2 and CaAl2Si2O8 at low oxidation temperature, whereas the SiO2-Al2O3-CaO ternary glassy phase was formed at elevated temperature. The deviation of oxidation resistance from each sample may be due to the morphological difference brought about by different additive additions. This study reveals the effects of additives on the oxidation resistance of synthesized Ca-α-SiAlON powders. View Full-Text
Keywords: combustion synthesis; oxidation; Ca-α-SiAlON; additives combustion synthesis; oxidation; Ca-α-SiAlON; additives

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Li, J.; Li, Z.; Wang, E.; Wang, Z.; Yin, X.; Zhang, Z. Oxidation of Ca-α-SiAlON Powders Prepared by Combustion Synthesis. Materials 2015, 8, 7549-7562.

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