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Title

High temperature creep of 20 vol%. SiC-HfB2 UHTCs up to 2000 °C and the effect of La2O3 addition

AuthorsZapata-Solvas, E. ; Gómez-García, D. ; Domínguez-Rodríguez, A.; Lee, W. E.
KeywordsUltra-high temperature ceramics
Creep
Cavitation damage
Reaction damage
Limited ductility
Issue Date1-Jan-2018
PublisherElsevier
CitationJournal of the European Ceramic Society 38(1): 47-56 (2018)
AbstractHigh temperature compressive creep of SiC-HfB2 UHTCs up to 2000 °C has been studied. Microstructural analysis after deformation reveals formation of new phases in the Hf-B-Si and Hf-B-Si-C systems, which are responsible for the poor creep resistance. RE oxide additions have a negative effect reducing the creep resistance of SiC-HfB2 UHTCs. A simplistic analysis for the required creep resistance is described, indicating that only SiC-HfB2 UHTCs could withstand re-entry conditions for 5 min in a single use. However, RE oxide addition to SiC-HfB2 UHTCs does not provide the required creep resistance for them to be candidate materials for hypersonic applications.
Publisher version (URL)https://doi.org/10.1016/j.jeurceramsoc.2017.08.028
URIhttp://hdl.handle.net/10261/194101
DOI10.1016/j.jeurceramsoc.2017.08.028
ISSN0955-2219
Appears in Collections:(ICMS) Artículos
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