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Effect of Slip Dispersion on Microstructure Evolution During Isothermal Sintering of Cast Alumina
Author(s) -
McAfee Richard J.,
Nettleship Ian
Publication year - 2006
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.1551-2916.2005.00900.x
Subject(s) - sintering , microstructure , materials science , slip (aerodynamics) , isothermal process , composite material , flocculation , dispersion (optics) , metallurgy , chemical engineering , thermodynamics , physics , optics , engineering
The effect of slip dispersion on the consequent densification and microstructure evolution of alumina was studied for isothermal sintering. As expected, cast alumina bodies produced with flocculated slip required longer sintering time to reach high density. Quantitative microstructure analysis was used to study the relationships between the slip dispersion condition, the densification behavior, and microstructure evolution of cast alumina during sintering at 1350°C. A microstructural description based on pore boundary tessellation revealed a correlation between the degree of flocculation, tessellation cell properties, and densification rate. A conceptual understanding of the sintering of agglomerated powders was used to explain the observations.