Title

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

Authors

Authors

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

Comments

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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

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