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

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 c...

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Detalles Bibliográficos
Autores principales: Li, Jinfu, Li, Zhongmin, Wang, Enhui, Wang, Zhanjun, Yin, Xiaowei, Zhang, Zuotai
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2015
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5458926/
https://www.ncbi.nlm.nih.gov/pubmed/28793657
http://dx.doi.org/10.3390/ma8115394
Descripción
Sumario: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 SiO(2) and CaAl(2)Si(2)O(8) at low oxidation temperature, whereas the SiO(2)-Al(2)O(3)-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.

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