Synthesis, microstructural characterization, and mechanical property evaluation of vacuum plasma sprayed tantalum carbide

    Authors

    K. Balani; G. Gonzalez; A. Agarwal; R. Hickman; J. S. O'Dell;S. Seal

    Comments

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    Abbreviated Journal Title

    J. Am. Ceram. Soc.

    Keywords

    SOLIDIFICATION; TOUGHNESS; CERAMICS; ALLOYS; Materials Science, Ceramics

    Abstract

    Tantalum carbide (TaC) is an ultra-high-temperature ceramic for potential applications as protective coating, furnace components, propulsion liners for space shuttles and aircrafts, etc. Microstructural and mechanical behavior of vacuum plasma-sprayed (VPS) TaC has been investigated in the present study. Apart from major TaC phase, microstructural definitions elucidated Ta2C, non-stoichiometric TaCx phases (0.83 < = x < = 0.94), partial grain formation, polygonization of grains, and inhomogeneous C/Ta ratios in the sprayed structure. Near-isotropy in the fracture-toughness ratio (K-axial/K-trans=1.01) is attributed to compact coating, fine-closed porosity, and distribution of non-stoichiometric phases.

    Journal Title

    Journal of the American Ceramic Society

    Volume

    89

    Issue/Number

    4

    Publication Date

    1-1-2006

    Document Type

    Article

    Language

    English

    First Page

    1419

    Last Page

    1425

    WOS Identifier

    WOS:000236175200037

    ISSN

    0002-7820

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