Title

Dense Al₂O₃/ZrO₂ Particulate Composites by Free Sintering of Coated Powders

Editor(s)

Green, David J. and Halloran, John and Johnson, David W. and Klein, Lisa

Abstract

Composite powders, prepared by coating coarse ZrO2 particles with fine Al2O3 powder using a chemical precipitation technique, were compacted and sintered freely at a constant heating rate of 4°C/min to ∼1600°C. Composites containing up to ∼30 vol% inclusions were sintered to nearly full density under the same conditions used for the unreinforced matrix. Furthermore, the sintering kinetics were not influenced significantly by the inclusion volume fraction. the sinterability of the composites formed from the coated powders was significantly better than that for similar composites formed from mechanically mixed powders. the present data provide a further demonstration that the use of coated powders may have widespread applicability for the fabrication, by free sintering, of dense ceramic particulate composites.

Department(s)

Materials Science and Engineering

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1994 Wiley-Blackwell, All rights reserved.

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