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Influence of Multiple Heterogeneities on Sintering Rates
Author(s) -
Hsueh ChunHway,
Evans Anthony G.,
Mcmeeking Robert M.
Publication year - 1986
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.1151-2916.1986.tb04752.x
Subject(s) - sintering , agglomerate , materials science , volume fraction , hydrostatic equilibrium , ultimate tensile strength , composite material , constitutive equation , mineralogy , thermodynamics , chemistry , physics , quantum mechanics , finite element method
The sintering rate of a powder compact containing heterogeneities was calculated. The calculations reveal a strong retardation of sintering in the presence of nonsinterable agglomerates because of the development of a hydrostatic tensile stress. The variation in sintering rate with volume fraction is shown to be highly nonlinear, such that appreciable effects obtain even for 1% agglomerated powder. Specific results are calculated using constitutive laws pertinent to Al 2 O 3 .