Title

Oxidation Of Polymer-Derived Sialcn Ceramics

Abstract

The oxidation behavior of polymer-derived amorphous SiAlCNs was studied in the temperature range of 900°-1200°C. The results revealed that while at 900°C the oxidation of the SiAlCNs follows typical parabolic kinetics, at higher temperatures the oxidation rates of the materials decrease with annealing time. Long-term oxidation rate of the SiAlCNs is much lower than the lowest values reported for chemical vapor deposition of SiC and Si3N4. Structures of the oxide scales were studied using solid-state nuclear magnetic resonance. We proposed that oxide scales formed for the SiAlCNs possess a unique network structure of the oxide scale in which aluminum atoms block the path of oxygen diffusion, thus lowering the oxidation rates. Such a unique structure was likely formed gradually with annealing time, leading to a continuous decrease in oxidation rate. © 2005 The American Ceramic Society.

Publication Date

11-1-2005

Publication Title

Journal of the American Ceramic Society

Volume

88

Issue

11

Number of Pages

3075-3080

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1111/j.1551-2916.2005.00542.x

Socpus ID

33644757344 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/33644757344

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