Significant improvement of the self-protection capability of ultra-high temperature ceramic matrix composites
•Short term oxidation tests at 1500 °C and 1650 °C were carried out on UHTCMC.•Less than 30 vol% of ZrB2 into SiC(O) matrix is able to impart a fast passivation.•Oxidation resistance was affected by the distribution of ZrB2 into the SiC matrix. The oxidation behaviour of Cf/ZrB2-SiC with different f...
Gespeichert in:
Veröffentlicht in: | Corrosion science 2021-08, Vol.189, p.109575, Article 109575 |
---|---|
Hauptverfasser: | , , , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | •Short term oxidation tests at 1500 °C and 1650 °C were carried out on UHTCMC.•Less than 30 vol% of ZrB2 into SiC(O) matrix is able to impart a fast passivation.•Oxidation resistance was affected by the distribution of ZrB2 into the SiC matrix.
The oxidation behaviour of Cf/ZrB2-SiC with different fibre architectures, manufactured by slurry impregnation, polymer infiltration and mild pyrolysis, was investigated. Short term oxidation tests in air were performed for 1 min and 5 min at 1500 °C and 1650 °C in a bottom loading furnace. Microstructure, oxide scale thickness and composition were analysed by SEM/EDS/XRD. Results indicated that a good dispersion of ZrB2 particles in the polymer derived SiC(O) matrix promoted the formation of compact scales filling surface holes left by fibre oxidation. 20−30 vol% of ZrB2 in the material was found a good compromise between lightness and oxidation resistance. |
---|---|
ISSN: | 0010-938X 1879-0496 |
DOI: | 10.1016/j.corsci.2021.109575 |