Title

Silicoaluminum carbonitride with anomalously high resistance to oxidation and hot corrosion

Authors

Authors

L. G. Zhang; Y. Fan; J. S. Lou; M. H. Chug; Y. G. Wang; L. Bharadwaj;L. N. An

Comments

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Abbreviated Journal Title

Rare Metal Mat. Eng.

Keywords

PDC; silicoaluminum carbonitride ceramics; oxidation; hot corrosion; CRYSTAL SILICON-CARBIDE; CERAMICS; NITRIDE; SI3N4; Materials Science, Multidisciplinary; Metallurgy & Metallurgical; Engineering

Abstract

In this communication we report for the first time that amorphous silicoaluminum carbonitride (SiAlCN) ceramics possess anomalously high resistance to oxidation and hot-corrosion. The materials were synthesized by thermal decomposition of polymer precursors.([18]) The oxidation kinetics of the materials was determined at 1 200 degrees C in dry air by measuring the thickness of the oxide scale as a function of annealing times up to 200 h. The hot-corrosion behavior was studied by scanning electron microscopy (SEM) observation on the surfaces of the materials that were annealed in either NaCl or water vapor environments at 1 200 degrees C for 50 h. The experiments were performed on two SiAlCN ceramics with different aluminum content (see table 1); the hot-corrosion experiments were also performed on SiCN without aluminum for comparison. A mechanism underlying the observed phenomena is discussed

Journal Title

Rare Metal Materials and Engineering

Volume

34

Publication Date

1-1-2005

Document Type

Article

Language

English

First Page

486

Last Page

489

WOS Identifier

WOS:000231986900135

ISSN

1002-185X

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