Role of spray drying of nanoagglomerates in morphology evolution in nanostructured APS coatings

    Authors

    V. Viswanathan; K. E. Rea; A. Vaidya;S. Seal

    Comments

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    Abbreviated Journal Title

    J. Am. Ceram. Soc.

    Keywords

    ZIRCONIA COATINGS; PLASMA; POWDER; MICROSTRUCTURE; NANOCOMPOSITE; ALUMINA; Materials Science, Ceramics

    Abstract

    Nanostructured coatings undergo many processing challenges during atmospheric plasma spray if the feedstock is not well prepared. The effects of using spray drying on achieving a suitable feedstock for an even flow of nanoparticles through the gun, the selection of plasma gases for optimum heat transfer, and the velocity of the agglomerates during flight are highlighted in this communication. Analytical heat transfer calculations are used for coating property optimization. The physical characteristics of the nanoagglomerates are studied using diagnostics sensor and scanning electron microscopy. Transmission electron microscopy revealed the retention of nanostructures.

    Journal Title

    Journal of the American Ceramic Society

    Volume

    91

    Issue/Number

    2

    Publication Date

    1-1-2008

    Document Type

    Article

    Language

    English

    First Page

    379

    Last Page

    386

    WOS Identifier

    WOS:000252930100005

    ISSN

    0002-7820

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