SiC-TiC nano composite powder prepared by sol-gel method and Carbothermal reduction

In recent years, SiC-TiC nano composite, attracted a lot of interest due to it's good electrical and mechanical property at high temperatures. In this study, nano composite powder of SiC-TiC using Titanium(IV) isopropoxide, Tetraethyl orthosilicate, Sucrose and nitric acid through Sol-gel method were synthesized. After mixing at 60 ℃, after 5 hours, the viscosity of the solution increased and the gel was fabricated. Produced gel heated at 110 ℃, then, the sample heated at 1500℃ under an argon atmosphere for 1 hour. Thermal analysis of the prepared gel from 25 ℃ to 1300℃, revealed decomposition of organic compounds in the temperature range between 200 ℃ to 400℃, In addition, sucrose carbonization was observed. XRD results showed that SiC and TiC have been formed because of reaction amorphous silica and titania with carbon at 1500 ℃. For evaluation of dimension and morphology of the synthesized powder, field emission scanning electron microscopy (FESEM) was used. The size of sample particles were between 20 and 70 nm.