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

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The origin of the inner stress in the ceramics green bodies prepared by colloidal forming was studied. The results show that the inner stress originates from the nonuniform shrinkage during the solidification of the precursor suspension and the drying of the green bodies, and the gradients of temperature, initiator concentration and moisture are the important original factors causing the inner stress. The inner stress could result in cracks in the green bodies during debinding.

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Periodical:

Materials Science Forum (Volumes 475-479)

Main Theme:

Edited by:

Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie

Pages:

1313-1316

Citation:

L. M. Zhang et al., "Origin, Transformation and Control of the Inner Stress in the Green Bodies Prepared by Ceramic Colloidal Forming Processing", Materials Science Forum, Vols. 475-479, pp. 1313-1316, 2005

Online since:

January 2005

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$38.00

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[1] [2] [3] [4] [5] [6] [7] Drying rate / g/hr Drying rate Shrinkage ratio / % Time / hr Shrinkage ratio Fig. 6 The shrinkage ratio and drying rate of Al2O3 disc prepared by gelcasting during drying Fig. 7 The cracks in Al2O3 disc prepared by gelcasting after debinding.

DOI: https://doi.org/10.3403/30168471u