TEM Investigations on Three-Dimensional Silica Fiber Reinforced Silicon Nitride Composites

Abstract:

Three-dimensional silica fiber reinforced silicon nitride composites were prepared by polymer infiltration and pyrolysis method using perhydropolysilazane (PHPS) and polyhydridomethylsilazane (PHMS), respectively. The microstructures of the composites were characterized by transmission electron microscopy. Strong fiber/matrix interfacial adhesion was observed for the PHPS-derived composites prepared at 1073K, and the PHMS-derived composites prepared at 873K without fiber precoating. While for the PHMS-derived composites prepared at 873K with fiber precoating, the coating changed the fiber/matrix interfacial bonding conditions, leading to high mechanical properties.

• Periodical: Advanced Materials Research (Volumes 562-564)
• Pages: 431-434
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.562-564.431
• Online since: August 2012
• Authors: Gong Jin Qi
• Keywords: Ceramic Matrix Composites, Silica Fiber, Silicon Nitride, TEM

References

[1] G. J. Qi, C. R. Zhang, H. F. Hu, et al. Preparation of three-dimensional silica fiber reinforced silicon nitride composite using perhydropolysilazane as precursor. Materials Letters, 2005, 59(26): 3256-3258.

DOI: 10.1016/j.matlet.2005.04.057

[2] G. J. Qi, C. R. Zhang, H. F. Hu, et al. Effects of precoating on mechanical properties and microstructures of 3D SiO2f/Si3N4 composites using polyhydridomethylsilazane. Materials Science and Engineering A, 2006, 416(1-2): 317-320.

DOI: 10.1016/j.msea.2005.09.114