Microscopy and electron spectroscopic study of the interfacial chemistry in Al-Ti alloy/graphite systems

    Authors

    S. Seal; T. L. Barr; N. Sobczak;S. J. Kerber

    Comments

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    Abbreviated Journal Title

    J. Mater. Sci.

    Keywords

    X-RAY PHOTOELECTRON; COMPOSITES; METALS; Materials Science, Multidisciplinary

    Abstract

    The chemical and physical interaction of liquid metal surfaces with various substrates is an important, largely unexplored aspect of technology, with implications in composite science and catalysis. In the present case, we have employed X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES), in conjugation with sessile drop wettability tests, to examine the interfacial properties and surface chemistry of the systems formed by adding liquid drops of select AI-Ti alloys to graphite substrates. A variety of different chemical states was revealed in the XPS results, suggesting the formation of separate regions composed of elemental metals, alloys and carbides. Many of the specific features detected appear to depend on the various treatment properties, e.g. the temperature, bulk alloy composition, size and shape of the alloy drop and time of interaction. The surface analyses were also supported by optical microscopy, scanning electron microscopy (SEM) and X-ray diffraction (XRD) studies. The combined results suggest the induction of a strong reaction between titanium and carbon, resulting in an improvement in the wettability of the alloy with the graphite substrate and a corresponding structure transformation from the (LaAl-Ti + Al3Ti) state to the (LAl-Ti + TiC) semi-liquid state. (C) 1998 Kluwer Academic Publishers.

    Journal Title

    Journal of Materials Science

    Volume

    33

    Issue/Number

    16

    Publication Date

    1-1-1998

    Document Type

    Article

    Language

    English

    First Page

    4147

    Last Page

    4158

    WOS Identifier

    WOS:000078833300019

    ISSN

    0022-2461

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