Microstructure and properties of SiO2-based ceramic cores with ball-shaped powders by the preceramic polymer technique in N2 atmosphere

In this paper, SiO2-based ceramic cores were prepared successfully by the preceramic polymer technique. Effects of sintering temperatures and silicone resin contents on the microstructure and properties of SiO2-based ceramic cores were investigated in N2 atmosphere. Results showed that in N2 atmosphere, the silicone resin transformed into the amorphous SiOC and C-nanowires. SiOC phases mainly adhered on the surface of ball-shaped SiO2 grains and...