Journal
CERAMICS INTERNATIONAL
Volume 35, Issue 7, Pages 2871-2876Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2009.03.043
Keywords
Calcination; X-ray methods; Thermal properties; Si-B-N-C ceramics
Categories
Funding
- Exploring Program for W E of China
- National High Technology Research and Development Program of China [2006AA03A217]
Ask authors/readers for more resources
To study the thermal stability of polymer derived SiBNC ceramics, a polyborosilazane was pyrolyzed in N-2 and NH3/N-2 atmosphere, respectively. The as-pyrolyzed products were annealed in N-2 atmosphere at 1200-1850 degrees C for 2 h. The chemical composition and phase structure of the as-pyrolyzed and annealed ceramics were investigated by element analysis, XRD and FT-IR. The results show that all the ceramics exhibit excellent high temperature stability. They are fully amorphous to 1700 degrees C, and only partial crystallization, giving a mixture Of Si3N4, BN and SiC phases, is observed upon heating at 1850 degrees C. The N-2 pyrolyzed products show better stability than the NH3/N-2 pyrolyzed products and have less tendency to crystalline at higher temperatures. Better retention of nitrogen at high temperatures is also observed for the N-2 pyrolyzed products. (C) 2009 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available