Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 35, Issue 15, Pages 4059-4071Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2015.07.026
Keywords
UHTC; Oxidation; FIB-SIMS; TEM; Characterisation
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Funding
- DSTL, UK [DSTLX-1000015413]
- Fundacion Ramon Areces, Spain
- Centre for Advanced Structural Ceramics (CASC)
- JAE-DOC post-doctoral programme of CSIC, Spain
- European Social Fund (FSE)
- EPSRC [EP/K008749/1, EP/K008749/2] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/K008749/2, EP/K008749/1] Funding Source: researchfish
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ZrB2 based UHTCs (ZrB2/20 vol.% SiC) with rare earth additions (La2O3, LaB6 and Gd2O3) were oxidised for 1 hat 1600 degrees C and the oxidised layers analysed by FIB-SIMS and TEM techniques. Rare earth elements added to ZrB2/20 vol.% SiC led on oxidation to formation of a thick (up to similar to 350 mu m) protective oxide layer. Detailed cross-sectional analyses of oxidised layers revealed that they comprised of mixed crystalline and amorphous phases: m-ZrO2 and zirconates were formed on the oxidised surfaces in all samples as well as evidence of immiscible liquid. (C) 2015 Elsevier Ltd. All rights reserved.
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