910 (measuring range from 1 105 to 1500 Torr). For the low temperature synthesis (SiO2/C syn-
thesis), the temperature in the sample was measured with two type “K” thermocouples. For the case of the high temperature tests (SiC synthesis), a thermographic camera Flir Mod SC2500N(temperature range from 400 to 3000 C) was used to measure the temperature.