Title

Intragranular Tungsten/Zirconium Carbide Nanocomposites via a Selective Liquid/Solid Displacement Reaction

Abstract

A selective liquid/solid displacement reaction has been used, for the first time, to convert non-oxide ceramic solid solutions into composites comprised of intragranular metal nanoparticles embedded within non-oxide ceramic microcrystals. The reaction of (Zr xW 1-x)C microparticles with a Zr-Cu liquid at 1300°C resulted in the formation of W/ZrC microparticles with a core-shell morphology. The internal microparticle core was comprised of W nanoparticles embedded within a single crystal ZrC matrix, whereas the W-free shell was comprised of an epitaxial layer of ZrC. Such a selective liquid/solid reaction process may be used to generate a variety of intragranular metal/ceramic-matrix composites.

Meeting Name

International Conference on Biomaterials and Implants: Prospects and Possibilities in the New Millennium, BIO 2011 (2011, Jul. 21-23, Kolkata, India)

Department(s)

Materials Science and Engineering

Comments

Supported by the Air Force Office of Scientific Research, via Awards No. FA9550-07-1-0115 and FA9550-09-1-0162, and by the U.S. Department of Energy via Award No. DE-SC0002245.
Based in part on the thesis submitted by D.W. Lipke in partial fulfillment of the requirements for the Ph.D. degree in Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 2011.

Keywords and Phrases

Core-shell morphologies; Displacement reactions; Micro-particles; Nonoxide ceramics; Reaction process, Carbides; Oxides; Zirconium; Zirconium compounds, Substitution reactions

International Standard Serial Number (ISSN)

0002-7820; 1551-2916

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2012 American Ceramic Society, All rights reserved.

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