Modeling of Pressureless Constant Heating Rate Sintering of Ceramic Matrix Composites
A viscoelastic finite-element model is developed for analyzing the pressureless constant-heating-rate sintering of particulate-or whisker-reinforced ceramic-matrix composites. The sintering potential is assumed to be a function of heating rate, temperature and relative density and is obtained from experimental data on the densification of an identical unconstrained (unreinforced) matrix sample. The reinforcement is modelled as a spherical or ellipsoidal unsinterable inclusion and the matrix as a compressible viscoelastic material. The results show that inclusions result in reduced sinterability and cause a heterogeneous density distribution, the heterogeneity of density, mechanical properties and residual stresses being affected by the shape of the inclusions. The initial homogeneity (or lack of it) of the green compact has been also shown to affect the final density. © 1995.
L. R. Dharani et al., "Modeling of Pressureless Constant Heating Rate Sintering of Ceramic Matrix Composites," Journal of Materials Processing Technology, Elsevier, Jan 1995.
The definitive version is available at http://dx.doi.org/10.1016/0924-0136(94)01740-R
Mechanical and Aerospace Engineering
Article - Journal
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