PENG Yuqing, ZHANG Jing, HAN Keqing, MU Shiwei, YU Muhuo

(State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering,Donghua University, Shanghai 201620, China)

Abstract：SiBNC ceramic fibers were prepared by a polymer derived ceramic route. The pyrolysis process of precursor fibers was investigated via TGA, FTIR, GC-MS and EA. The results showed that there were three weight loss ranges during the pyrolysis of preceramicpolymer fibers in nitrogen atmosphere. Observed in combination with FTIR and GC-MS techniques, the chemical structure changed significantly due to the release of methylamine and methane in the temperature range from room temperature to 800 ℃, and the EA results exhibited that the carbon content decreased obviously. The ceramization was completed when the temperature was up to 800 ℃. Bonds of B-N and Si-N existed in the structure of the resultant SiBNC ceramic fibers pyrolyzed at 1600 ℃.

Key words: SiBNC; ceramic fibers; polymer derived ceramics; pyrolysis