218 Strength and sliding properties of carbon : silica composite produced from rice husk without binder
Details
A carbon/silica composite (CSC) was fabricated from rice husk (RH). RH was pulverized by using a planetary ball mill, then carbonized and molded into the precursor by means of hot-pressing without using any binders. A compression of 100 MPa was intermittently applied to the RH powder heated from room temperature to 150℃, and then to 280℃. The CSCs were produced sintering the precursor at 800, 1000, 1200 and 1400℃ without compression in nitrogen gas. The CSC sintering at 800℃ for 1 h provided the maximum bulk density of 1.52 g/cm^3 and the maximum Vickers hardness of 343. The maximum compressive strength was measured to be 55.7 MPa at the sintering temperature of 1200℃. The CSC sintered at 1000℃ showed the coefficient of static friction of 0.15 and the coefficient of dynamic friction of 0.05.
