Title

Effects of Non-Homogeneous Compaction on Densification of Ceramic Matrix Composites

Abstract

A viscoelastic finite element method is applied to analyze the effect of non-homogeneous compaction on densification of ceramic matrix composites. The heterogeneous matrix of the composite is represented by a two region matrix geometry. The free sintering potential can be expressed in terms of a shrinkage coefficient. The shrinkage coefficient is derived from the relationship of relative density versus sintering time, measured from the pure matrix phase sample. The shrinkage coefficient is a prerequisite for conducting the finite element analysis. Since the information needed to deduce the shrinkage coefficient is not available for all portions of the heterogeneous matrix, two different relationships are assumed, based on the concepts of neck formation and neck growth between contacting particles, and pore coarsening. The results of the finite element analysis show that a non-uniform compaction of the composites generally has a detrimental effect on the densification process.

Meeting Name

American Society of Mechanical Engineers, Materials Division (Publication) MD (1992, Anaheim, CA, USA)

Department(s)

Mechanical and Aerospace Engineering

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1992 American Society of Mechanical Engineers (ASME), All rights reserved.

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