Avoiding the oxidation of SiC in SiC-borosilicate glass composites by adding zinc

Effect of Gradient TiC–Ti5Si3–TiSi2 barrier layer on SiC in SiC–borosilicate glass composites

“…However, in the SiC-borosilicate glass SiC was seriously oxidized at temperatures lower than 850°C. According to the research of Jackson [12] and Dey [13] and our previous research [14], the SiC in SiC-borosilicate glass composites was oxidized due to the effect of the oxygen and the alkali oxides (R 2 O). If oxygen or R 2 O lacked, the oxidation would stop.…”

“…Our previous research [14,15] added Ti or Zn elements to absorb the oxygen in composites to protect SiC, but the large amount of oxidation resultant of Ti or Zn changed the composition of borosilicate glass seriously, which dramatically raised the refractoriness of composites. Depositing a barrier layer on surfaces of SiC particles would restrict the oxidation of SiC in glass by isolating SiC from O 2 and R 2 O. Villegas [16] thickened the SiO 2 layer through oxidation treatment, but this treatment caused a degradation of SiC and is not useful for fine particles.…”