Synthesis of nanocomposites by mechanical alloying

    Authors

    C. Suryanarayana

    Comments

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    Abbreviated Journal Title

    J. Alloy. Compd.

    Keywords

    Mechanical alloying; Nanocomposites; Microstructure; Mechanical; properties; Superplasticity; MOLYBDENUM DISILICIDE COMPOSITES; BEHAVIOR; MOSI2; OXIDATION; POWDERS; Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy &; Metallurgical Engineering

    Abstract

    Nanocomposites were synthesized by the solid-state powder processing technique of mechanical alloying in Al-Al(2)O(3), TiAl-Ti(5)Si(3), and MoSi(2)-Si(3)N(4) systems. The mechanically alloyed powders were consolidated to full density by techniques such as vacuum hot pressing, hot isostatic pressing, and combinations of them. The as-milled powders as well as the consolidated compacts were characterized for their crystal structure features using X-ray diffraction and for the microstructural features using scanning and transmission electron microscopy techniques. Mechanical properties such as hardness, ductility, and fracture toughness were also measured. It has been shown that it is possible to produce a high volume fraction of the reinforcement of nanometer dimensions and that the properties of the nanocomposites are significantly better than those of the monolithic materials. Superplastic deformation has been demonstrated in TiAl-Ti(5)Si(3) composite even when 60 vol.% of the ceramic reinforcement was present. (C) 2010 Elsevier B.V. All rights reserved.

    Journal Title

    Journal of Alloys and Compounds

    Volume

    509

    Publication Date

    1-1-2011

    Document Type

    Article; Proceedings Paper

    Language

    English

    First Page

    S229

    Last Page

    S234

    WOS Identifier

    WOS:000291463000051

    ISSN

    0925-8388

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