|
|
|
| Processing Property of Liquid Polycarbosilane Precursor on Preparation of Ceramic Composites |
| ZHANG Bingyu, YANG Jinhua, WANG Ling |
| ( AVIC Composite Corporation LTD., Beijing 101300, China ) |
|
|
|
Abstract Ceramic precursor plays an important role in preparing ceramic matrix composites through PIP （Precursor
Infiltration and Pyrolysis） method. The properties of precursors have decisive influence on manufacturing process and
properties of the composites. A new liquid ceramic precursor VHPCS and its ceramic products were investigated by infrared
spectrometry, differential scanning calorimetry, thermal gravimetric analysis and X-ray diffraction. Also, the curing
and pyrolysis behavior of VHPCS had been discussed. Results showed that VHPCS contained both Si-H and Si-CH=CH2
reactive groups, and it could be cured above 165℃ . The ceramic yield of VHPCS at 1000℃ in nitrogen atmosphere was
60% and the pyrolysed products showed well crystal-structure stability in the temperature range of 1000-1300℃ . Results
showed that VHPCS could be a promising precursor for PIP method.
|
|
|
|
|
|
|
|
|
2017, 
