properties of C/C-SiC composites used as space materials
- Paper number
IAC-15,C2,4,5,x28209
- Author
Mr. Kunjie Wang, Xi'an Aerospace Composites Research Institute, China
- Year
2015
- Abstract
To decrease anisotropy and collected volatile condensed materials (CVCM) of C/C composites, C/C-SiC composites were prepared by chemical vapor infiltration combined with reactive infiltration of molten silicon. Microstructures, macro-performances and contents of CVCM were investigated. Results indicate that tensile strength and modulus of as-prepared composites with the density of 1.9 g/cm3 are 38.3 MPa and 65.1 GPa, respectively. The linear expansion coefficient of composites in X-Y dimension at 373 K is approximate to that in Z dimension with the value of 27.7 W/(m K) and 22.2 W/(m K), respectively. Contents of CVCM are only 0.001%. Combination property results show that chemical vapor infiltration combined with reactive infiltration of molten silicon is a useful method to prepare C/C-SiC composites with high modulus, low linear expansion and low content of CVCM, and the as-prepared composites are an ideal choice space material.
- Abstract document
- Manuscript document
(absent)