Preparation of SiC_w/Al₂O₃ Composite Sheets through Gel-Tape-Casting Process

Abstract:

In this paper, the gel-tape-casting process was applied to manufacture multilayer green sheets of SiCw /Al2O3 composite. The influence of SiCw, ball milling time and solids loading on the rheological behaviors of SiCw/Al2O3 slurries were investigated. It was found that the slurries exhibited a shear thinning behavior. The viscosity of the slurry increased with increasing of the fraction of SiCw. A stable slurry with 40 vol.% solids loading was prepared when 20 vol.% of SiCw was added. The flexural strength of the green sheet showed a trend of increasing firstly and then decreasing with SiCw increasing. The optimal mechanical properties of 40.2 MPa for flexural strength was obtained when SiCw contents was 20 vol.%. SEM observation indicated that significant whisker alignment was present in the composite tape, which was considered as one of parameters affecting toughening process.

• Periodical: Materials Science Forum (Volumes 675-677)
• Pages: 119-122
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.675-677.119
• Online since: February 2011
• Authors: Shao Chun Li, Peng Zhang, Tie Jun Zhao, Zu Quan Jin, Song Gao
• Keywords: Gel Tape-Casting, SiC_w/Al₂O₃ Composite, Slurry

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