Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 38, Issue 6, Pages 2495-2501Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2018.01.015
Keywords
Preceramic polymer; Polymer derived ceramics; Crack healing; Strength recovery
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Funding
- Deutsche Forschungsgemeinschaft (DFG) [GR 961/33-1]
- Exzellenzcluster Engineering of Advanced Materials (EAM)
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In this study, SiOC/FeSiCr/SiC-ceramics were derived by using polymethylsilsesquioxane as a polymeric precursor and FeSiCr (iron-chromium-silicide) and SiC powders as ceramic fillers in a polymer-extrusion process followed by pyrolytic conversion in a nitrogen atmosphere. The crack healing properties of the ceramic in an oxidising atmosphere were subsequently investigated. The SiOC/FeSiCr/SiC-ceramics showed crack closure and strength recovery behaviour after oxidation treatments in air from 600 to 1300 degrees C with various holding times from 2 to 1000 min. The crack healing mechanisms at different oxidation temperatures and with various dwell times are discussed.
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