Plasma spray formed near-net-shape MoSi2-Si3N4 bulk nanocomposites - structure property evaluation

    Authors

    S. J. Hong; V. Viswanathan; K. Rea; S. Patil; S. Deshpande; P. Georgieva; T. McKechnie;S. Seal

    Comments

    Authors: contact us about adding a copy of your work at STARS@ucf.edu

    Abbreviated Journal Title

    Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.

    Keywords

    plasma spray forming; MoSi2-Si3N4-SiC nanocomposite; fracture toughness; SILICON-NITRIDE; OXIDATION; MOSI2; COMPOSITES; COATINGS; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering

    Abstract

    This article, for the first time, presents the challenges toward the successful consolidation of near-net-shape bulk MOSi2-Si3N4-SiC nanocomposite using plasma spray forming. A detailed characterization of the spray formed bulk nanocomponent has been performed using optical microscopy (OM), scanning electron microscopy (SEM), scanning transmission electron microscopy (STEM), and Vickers hardness testing. Vickers hardness (900 Hv) and fracture toughness (similar to > 5 MPa m(1/2)) of the nanocomposite showed a little deviation from the expected, which might be due to the difference in the particle (Si3N4) size and their distribution in the MOSi2 matrix as a function of component thickness. Relatively higher hardness is attributed to the retention of the nanostructure in the composite. In addition, the as fabricated bulk nanocomposite showed enhanced oxidation resistance. (c) 2005 Elsevier B.V. All rights reserved.

    Journal Title

    Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing

    Volume

    404

    Issue/Number

    1-2

    Publication Date

    1-1-2005

    Document Type

    Article

    Language

    English

    First Page

    165

    Last Page

    172

    WOS Identifier

    WOS:000232252800023

    ISSN

    0921-5093

    Share

    COinS