Abstract
One proposed blanket concept uses advanced ferritic alloys and a SiC/SiC composite flow channel insert with both Pb-17 at.%Li and He coolants. As the first step in determining the long-term compatibility of SiC/SiC in Pb-Li, specimens of high-purity, chemical vapor deposited (CVD) SiC were exposed in capsules for up to 5000 h at 800 °C and 1000 h at 1200 °C. Dissolved Si was detected in the Pb-Li after the highest temperature exposures suggesting that SiC may be limited to <1100 °C in Pb-Li. Aluminide coatings are being considered for corrosion resistant coatings for the tubing between the first wall and the heat exchanger. Initial results indicate that, in Pb-Li at 700 °C, FeCrAl, Fe3Al and NiAl form a protective alumina layer which reduces dissolution compared to type 316 stainless steel.
Original language | English |
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Pages (from-to) | 1150-1154 |
Number of pages | 5 |
Journal | Journal of Nuclear Materials |
Volume | 367-370 B |
Issue number | SPEC. ISS. |
DOIs | |
State | Published - Aug 1 2007 |
Funding
The research was sponsored by the US Department of Energy (DOE), Office of Fusion Energy Sciences, Fusion Energy Materials Program, under contract DE-AC05-00OR22725 with UT-Battelle, LLC. D.F. Wilson and J.R. DiStefano consulted on the experimental procedure. H. Longmire and L. Walker assisted with the experimental work. S.J. Pawel, J.R. DiStefano and S.J. Zinkle provided comments on the manuscript.
Funders | Funder number |
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Fusion Energy Materials Program | DE-AC05-00OR22725 |
U.S. Department of Energy | |
Fusion Energy Sciences |