Journal article Open Access
Efficacy of a ZrB2–SiC matrix in protecting C fibres from oxidation in novel UHTCMC materials
Luca Zoli; Diletta Sciti
A series of high-density ceramic composites with carbon fibre content between 40 and 65% and ultra-refractory ceramic matrix was produced by slurry infiltration and hot pressing. The matrix consisted of ZrB2–10 vol% SiC or ZrB2–40 vol% SiC ceramic mixtures. Water–based and polymer–based routes were tested to analyse the effects on microstructure, mechanical properties and oxidation resistance at 1650 °C in air. Changing the process and/or the processing parameters was found to affect the final composition, the amount of residual porosity, the matrix/fibre adhesion. Composites with nearly fully dense matrix and optimized infiltration of fibre preforms were found to possess the highest strength (240 MPa) and oxidation resistance. Composites with a weak interface and higher porosity in the matrix showed higher toughness (up to 12 MPa m0.5) but were more prone to oxidation and erosion.
| Name | Size | |
|---|---|---|
|
Zoli Sciti Material.pdf
md5:b50a3a5c06a5a87953ef6f4d52e410e6 |
698.5 kB | Download |
| Views | 3 |
| Downloads | 8 |
| Data volume | 5.6 MB |
| Unique views | 3 |
| Unique downloads | 8 |
- Publication date:
- January 5, 2017
- DOI:
-
- Keyword(s):
- carbon ZrB2 Microstructure Mechanical properties Oxidation resistance
- Grants:
-
European Commission:
- C3HARME - NEXT GENERATION CERAMIC COMPOSITES FOR COMBUSTION HARSH ENVIRONMENTS AND SPACE (685594)
- License (for files):
- Creative Commons Attribution-NonCommercial 4.0