Cellular SiC ceramics from plant precursor by silica sol infiltration and carbothermal reduction processing

2^nd International Conference and Exhibition on Materials Science & Engineering

October 07-09, 2013 Hampton Inn Tropicana, Las Vegas, NV, USA

Nijhuma Kayal, Anwesha Maity and Omprakash Chakrabarti

Accepted Abstracts: J Material Sci

Abstract :

Biomorphic SiC was prepared at high temperature by carbothermal reduction of plant-derived bio-carbonaceous skeletal preform infiltrated with sol-gel SiO 2 . Two types of precursor plants representing dicotyledonous woods of mango, jack fruit and teak and gymnosperm pine of Indian origin were selected for pyrolytic conversion to carbon preforms which were infiltrated under atmospheric pressure and vacuum with water- and ethanol-based SiO 2 sol of concentration varying in the range of 15 to 40%. The SiO 2 -infiltrated carbon preform was heat-treated at 1550 o C under vacuum to obtain SiC ceramics via carbothermal reduction. The ceramics are further characterized by X-ray diffraction (XRD) analysis and field emission scanning electron microscopy (FESEM).

Biography :

Nijhuma Kayal has completed her Ph.D. (science) at the age of 26 years from Jadavpur University, Kolkata. She is working as scientist at CSIR- CGCRI from past 13 years. She has published more than 40 papers in reputed journals and is serving as a reviewer of several international journal