Aluminum composite reinforced with multiwalled carbon nanotubes from plasma spraying of spray dried powders

    Authors

    S. R. Bakshi; V. Singh; S. Seal;A. Agarwal

    Comments

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    Abstract

    Homogenous dispersion of carbon nanotubes (CNTs) in micron sized aluminum silicon alloy powders was achieved by spray drying. Excellent flowability of the powders allowed fabrication of thick composite coatings and hollow cylinders (5 mm thick) containing 5 wt.% and 10 wt.% CNT by plasma spraying. Two phase microstructure with matrix having good distribution of CNT and CNT rich clusters was observed. Microstructural evolution has been explained using single splat and the infiltration of CNT clusters by liquid metal. Partial CNT surface damage was observed in case of the 10 wt.% CNT coating due to CNT mesh formation and smaller size of spray dried agglomerate. Increase in the elastic modulus and improvement in the yield strength and elastic recovery properties due to CNT addition was observed by nanoindentation. (C) 2008 Elsevier B.V. All rights reserved.

    Journal Title

    Surface & Coatings Technology

    Volume

    203

    Issue/Number

    10-11

    Publication Date

    1-1-2009

    Document Type

    Article

    First Page

    1544

    Last Page

    1554

    WOS Identifier

    WOS:000263618600038

    ISSN

    0257-8972

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