Silicoaluminum carbonitride with anomalously high resistance to oxidation and hot corrosion

    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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