Study on Elimination of Surface-Exfoliation and Crack of ZrO2 Green Body of Gelcasting with Water-Solubility Macromolecule

Zhong Zhou Yi; Shi-en Wang; Yong Huang

doi:10.4028/www.scientific.net/MSF.475-479.1317

Paper Titles

Processing and Microstructure of an All-Oxide Ceramic Composite
p.1301

Fast Uniform Mixing & Controllable Colloidal Forming of Ceramics
p.1305

Gelcasting of Alumina Ceramic in Presence of Water-Soluble Polymer
p.1309

Origin, Transformation and Control of the Inner Stress in the Green Bodies Prepared by Ceramic Colloidal Forming Processing
p.1313

Study on Elimination of Surface-Exfoliation and Crack of ZrO₂ Green Body of Gelcasting with Water-Solubility Macromolecule
p.1317

Pretreatment Processing of Gelcast Green Body before Debinding
p.1321

Controllable Forming Technology in Gelcasting
p.1325

Biaxial Fracture Behavior of Polycrystalline Alumina
p.1329

Tensile Properties and Creep Behavior of SiC-Based Fibers under Various Oxygen Partial Pressures
p.1333

HomeMaterials Science ForumMaterials Science Forum Vols. 475-479Study on Elimination of Surface-Exfoliation and...

Study on Elimination of Surface-Exfoliation and Crack of ZrO₂ Green Body of Gelcasting with Water-Solubility Macromolecule

Abstract:

Ceramic gelcasting has to be performed in nitrogen to avoid surface-exfoliation and crack of the green body. The rapid drying of gelled bodies can cause nonuniform shrinkage. Non-uniform drying in various regions due to the solvent gradient, induces structural and residual stresses which cause defects, such as cracking, warpage and the other malformations. These malformations can be minimized or eliminated via adding a proper amount of water-soluble polymer polyethylene glycol(PEG).This study concentrates attention on dispersion, rheological property and gelation behavior in the new system, The flexural strength and microstructure of ZrO2 green bodies were measured and observed.

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Periodical:

Materials Science Forum (Volumes 475-479)

Pages:

1317-1320

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.475-479.1317

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Online since:

January 2005

Authors:

Zhong Zhou Yi, Shi-en Wang, Yong Huang

Keywords:

Gelcasting, Polyethylene Glycol (PEG), Surface-Exfoliation, Zirconia

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