Fabrication and tribological characterization of gradient carbon layer derived from SiC-TiC composites

    Authors

    H. T. Bae; J. H. Jeong; H. J. Choi;D. S. Lim

    Comments

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    Abbreviated Journal Title

    J. Ceram. Soc. Jpn.

    Keywords

    CDC (carbide derived carbon); SiC-TiC composite; Tribology; Wear; Complex-layer; HIGH-TEMPERATURE CHLORINATION; SILICON-CARBIDE; COATINGS; FILMS; BEHAVIOR; SURFACE; Materials Science, Ceramics

    Abstract

    Carbide based ceramics are frequently used for the tribological applications, such as mechanical seals, owing to their good mechanical and chemical properties. Recently, studies of the tribological properties of these applications have become increasingly important due to the increasing need for severe operating conditions. In this study, the surface modification of carbide ceramics was attempted to improve the triblogical properties. Carbon layers were prepared on SiC-TiC ceramics using a moderate and high temperature chlorination process. The microstructure and worn surfaces were analyzed by scanning electron microscopy and an alpha-step profilometer, respectively. Tribological tests were carried out on chlorinated SiC-TiC surfaces using a ball on disc wear tester. Since carbon atoms in TiC were derived at lower temperatures than SiC, the distribution of carbon atoms within the modified layers were synthesized by the difference in reaction temperature and reaction time. The tribological properties were varied by the volume fraction of carbon and SiC in the modified layer. The friction coefficient and wear rate were decreased by controlling the structure and composition of the carbon based layer from 0.22 to 0.18 and 7.91 to 1.92 (x10(-6)mm(3)/N.m), respectively. (C) 2010 The Ceramic Society of Japan. All rights reserved.

    Journal Title

    Journal of the Ceramic Society of Japan

    Volume

    118

    Issue/Number

    1384

    Publication Date

    1-1-2010

    Document Type

    Article

    Language

    English

    First Page

    1150

    Last Page

    1153

    WOS Identifier

    WOS:000285532400008

    ISSN

    1882-0743

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