Densification Study of SiC:Al2O3:Y2O3 with Polymer Additions
The influence of polymer precursor additions on liquid phase sintering of SiC:Al2O3:Y2O3 has been evaluated. Two polymer precursors were used: polymethylhydrogensiloxane and D4Vi (1,3,5,7-tetramethyl-1,3,5,7-tetraviniylcyclotetrasiloxane). The ceramic phase had the following composition in wt%: 91.6 SiC, 4.2 Al2O3 and 4.2 Y2O3. The composites were prepared using the following ceramic phase to polymer ratios in wt%: 82.7: 17.3; 74.0: 26.0 and 71.5: 28.5. Density measurements were carried out using a helium picnometry and the Archimedes method. The crystalline phases were identified by X-ray diffraction analysis and the microstructures were observed by optical and scanning electron microscopy.
Lucio Salgado and Francisco Ambrozio Filho
A. L. E. Godoy et al., "Densification Study of SiC:Al2O3:Y2O3 with Polymer Additions", Materials Science Forum, Vols. 498-499, pp. 494-499, 2005