Effect of Monomers Content and their Ratio on
Gelcasting of Fused Silica Ceramics |
Kishore Kumar Kandi,a,* Gurabvaiah Punugupati,a Sumit Kumar Palb and
Surya Prakash Rao Chilakalapallia
pages : 185-188
DOI : 10.1080/0371750X.2016.1190671 |
Abstract |
Fused silica ceramics with high flexural strength, and low warpage and shrinkage
were casted using gelcasting, a near net shape fabrication technique. Methylacrylamide
(MAM) and N,N-methylenebisacrylamide (MBAM) were used as monomers. The effects
of monomers content (MAM and MBAM) and their ratio (MAM/MBAM) on the flexural
strength, warpage and shrinkage rates on fused silica ceramics were investigated.
The warpage and shrinkage rates of fused silica bodies decreased with increasing
monomers content, while by increasing the ratio of monomers, warpage and shrinkage
rates got increased. Flexural strength of the green body also decreased with increasing
mononers content. With the increasing ratio of monomers, the flexural strength first
increased and then decreased, indicating that there is an optimum value for the ratio
of monomers. The maximum flexural strength obtained in this study was as high as
43.2 MPa.
[Keywords: Gelcasting, Fused silica, Monomers, Flexural strength, Warpage,
Shrinkage] |
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