Pore Size Distribution During Compaction and Early Stage Sintering of Silicon Nitride

Editor(s)

Carter, C. B.

Abstract

The effect of a number of compaction parameters on the pore size distribution in silicon nitride powder compacts has been investigated by mercury porosimetry. The powder was compacted in a uniaxial die and the parameters of interest included uniaxial load, loading rate, polymer additives and stress relaxation. The use of a low-viscosity polymer solution as a lubricant, the allowance of stress relaxation following loading and heat treatment above the glass transition temperature of the polymer lead to a more uniform pore size distribution in the green samples. The more uniform green samples, in turn, showed a more uniform pore size distribution after initial stage sintering. The potential of the present techniques for improving the microstructural uniformity in ceramic bodies is discussed.

Department(s)

Materials Science and Engineering

Keywords and Phrases

Polymer Sciences; Industrial Chemistry/Chemical Engineering; Characterization and Evaluation Materials; Mechanics

International Standard Serial Number (ISSN)

0022-2461

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1990 Springer Verlag, All rights reserved.

Publication Date

01 Jan 1990

Link to Full Text

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