PREPARATION OF MACRO-POROUS SIC-AL2O3 COMPOSITES WITH POLYSILANES AND POLYCARBOSILANES

被引：9
|
作者：
LANGGUTH, K
机构：
[1] Institut für Keramische Werkstoffe, TU Bergakademie, Freiberg, D-09596 Freiberg
来源：
CERAMICS INTERNATIONAL | 1995年 / 21卷 / 04期
关键词：
D O I：
10.1016/0272-8842(95)99788-D
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Spongelike polycarbosilanes with 50% open porosity were prepared by pyrolysis of a mixture of polysilanes and polycarbosilanes at 650 degrees C in argon. Porous SiC-Al2O3 composites were prepared by oxidation of the pyrolyzed preforms at 600 degrees C in air and subsequent infiltration with an aqueous Al2O3 slurry. Sintering was performed at 1600 degrees C in 1.5 MPa argon. The precursors were analyzed by infrared-spectroscopy and by thermal decomposition. The SiC-Al2O3 composites were investigated by light microscopy, scanning electron microscopy, energy dispersive X-ray analysis and electron scanning microanalysis.
引用
收藏
页码：237 / 242
页数：6
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