Paper Title:
Colloidal In-Situ Consolidation Forming of Al2O3 Ceramics Using Modified Starch
  Abstract

The forming of Al2O3 ceramics was carried out by the colloidal in-situ consolidation using modified starch in this work. The effects of the modified starch content in the alumina suspensions on their rheological behavior, consolidation, microstructure and properties of the green bodies were investigated. The different shape and high relative density of ceramic green bodies were achieved by this method. The results indicated that the alumina suspensions with modified starch were easier to cast due to their low viscosity and high fluidity. After drying, the linear shrinkage of the green bodies was low, ranging between about 1.5% and 2.2% and their bulk density was higher than 57% of the theoretical density. The maximum bending strength of the dried green bodies reached to 8.2 MPa and the microstructure of the green bodies was uniform with a narrow unimodal distribution of pore size. It is concluded that the colloidal in-situ consolidation casting using modified starch can perform near-net shaping of ceramic components with high-performance and it is a potential forming technique for ceramics.

  Info
Periodical
Key Engineering Materials (Volumes 280-283)
Edited by
Wei Pan, Jianghong Gong, Chang-Chun Ge and Jing-Feng Li
Pages
1027-1032
DOI
10.4028/www.scientific.net/KEM.280-283.1027
Citation
L. Chen, X. L. Song, J. D. Ye, B. Li, "Colloidal In-Situ Consolidation Forming of Al2O3 Ceramics Using Modified Starch", Key Engineering Materials, Vols. 280-283, pp. 1027-1032, 2005
Online since
February 2007
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