Room-Temperature Freeze Casting For Ceramics With Nonaqueous Sublimable Vehicles In The Naphthalene-Camphor Eutectic System

Freeze casting for Al2O3 was accomplished at room temperature with nonaqueous sublimable vehicles in the naphthalene-camphor eutectic system with a eutectic temperature of 31 deg C. A fully dense sintered body was obtained with a eutectic composition vehicle, whereas at most 90% T.D. was obtained with an off-eutectic composition vehicle due to formation of large uniquely shaped voids. Microstructural observation suggested that growing pro-eutectic crystals rejected the suspended Al2O3 particles to form large voids during the solidification process. At the eutectic composition, formation of fine lamellar microstructure in a solidified vehicle is considered to inhibit particle rejection resulting in large voids.

Author
K Araki & W Halloran
Origin
University Of Michigan, Usa
Journal Title
Jacs 87 11 2004 2014-2019
Sector
Glass Ceramics
Class
GC 612

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Room-Temperature Freeze Casting For Ceramics With Nonaqueous Sublimable Vehicles In The Naphthalene-Camphor Eutectic System
Jacs 87 11 2004 2014-2019
GC 612
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