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Impregnation Molding of Particle‐Filled Preceramic Polymers: Process Modeling
Author(s) -
Erdal Merve,
Güçeri Selçuk I.,
Danforth Stephen C.
Publication year - 1999
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1999.tb02034.x
Subject(s) - materials science , composite material , molding (decorative) , transfer molding , filtration (mathematics) , isothermal process , ceramic , particle (ecology) , volume fraction , volumetric flow rate , particle size , polymer , permeability (electromagnetism) , mold , mechanics , chemistry , thermodynamics , membrane , statistics , physics , mathematics , oceanography , geology , biochemistry
A process model is presented for the analysis and simulation of impregnation molding of particle‐filled, continuous‐fiber ceramic composites. A multidimensional, transient particle filtration formulation is coupled with isothermal, anisotropic Darcy flow to predict filler‐concentration profiles during molding. The particle filtration is insensitive to the injection flow rate; however, in irregularly shaped molds, the geometry of the mold greatly influences the local velocities, which results in local variations in the rate of filtration. Although the preform volume fraction and inlet particle concentration influence the particle accumulation quantitatively, the filtration coefficient and the permeability have a dominant role in setting the filtration trend.