Preparation of N-Methylpolyborosilazane -Derived Bulk Si-B-N-C Ceramics by Warm-Pressing and Pressureless Pyrolysis

Zhen Quan Liu; Jing Zhang; Xian Xing Qiu; Yu Qing Peng; Ke Qing Han; Mu Huo Yu

doi:10.4028/www.scientific.net/AMR.557-559.1148

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 557-559Preparation of N-Methylpolyborosilazane -Derived...

Preparation of N-Methylpolyborosilazane -Derived Bulk Si-B-N-C Ceramics by Warm-Pressing and Pressureless Pyrolysis

Abstract:

Additive-free bulk Si-B-N-C ceramics were prepared by pyrolysis of preceramic precursor (PBS-Me), which mainly involves cross linking, warm-pressing and pyrolysis. The density of crack-free bulk ceramic attains 1.94 g/cm³ when Calcined at 1300 °C. The shaped workpieces exhibit amorphous structure even be pyrolysised at 1400°C in N₂, and there are some pores existing in the green body derived from warm-pressing and the resulting Si-B-N-C ceramic body, and these pores allow the gaseous byproducts be expeled from bodies. The pyrolyzed samples were studied by high temperature thermo gravimetric analysis, it shows that the Si-B-N-C body had an excellent high temperature resistance.

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Periodical:

Advanced Materials Research (Volumes 557-559)

Pages:

1148-1151

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.557-559.1148

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Online since:

July 2012

Authors:

Zhen Quan Liu, Jing Zhang, Xian Xing Qiu, Yu Qing Peng, Ke Qing Han, Mu Huo Yu

Keywords:

Bulk Si-B-N-C Ceramics, Polymer-Derived Ceramics, Pressureless Pyrolysis, Warm-Pressing

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DOI: 10.1002/1521-3749(200007)626:7<1634::aid-zaac1634>3.0.co;2-1

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