This title appears in the Scientific Report :
2020
Yttria as a Tritium Permeation Barrier in Fusion Components
Yttria as a Tritium Permeation Barrier in Fusion Components
Poster Presentations Yttria as a Tritium Permeation Barrier in Fusion Components Ch. Linsmeier {FZ Juelich} The development of tritium permeation barriers (TPB) is crucial for a safe reactor operation. Thin oxide coatings, such as Al2O3 and Er2O3, are promising candidates for TPB, due to their high...
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Personal Name(s): | Linsmeier, Ch |
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Houben, Anne (Corresponding author) / Engels, J. | |
Contributing Institute: |
Plasmaphysik; IEK-4 |
Imprint: |
2018
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Conference: | Helmholtz Symposium on Materials And Coatings for High Temperature, Cambridge (UK), 2016-04-07 - 2016-04-08 |
Document Type: |
Abstract |
Research Program: |
Methods and Concepts for Material Development |
Publikationsportal JuSER |
Poster Presentations Yttria as a Tritium Permeation Barrier in Fusion Components Ch. Linsmeier {FZ Juelich} The development of tritium permeation barriers (TPB) is crucial for a safe reactor operation. Thin oxide coatings, such as Al2O3 and Er2O3, are promising candidates for TPB, due to their high thermal stability and corrosion resistivity, and their reasonable hydrogen permeation reduction factors. Their hydrogen permeation reduction factors are in the range of one to three orders of magnitude [1,2]. Due to the more favorable neutron activation behavior of Y compared to Al and Er, Y2O3 is produced as a TPB on Eurofer97 substrates. 1 µm thick layers are deposited on both substrate sides by RF magnetron sputter deposition. After annealing the cubic crystal structure is verified by X-ray diffraction and the microstructure is investigated by scanning electron microscopy. The permeation reduction factor is determined in gas-driven deuterium permeation experiments with a newly developed setup at FZ Jülich. First measurement results suggest that the permeation reduction factor is in the same order of magnitude than for Er2O3. Since the permeation reduction depends heavily on the microstructure of the barrier layer, layers with different microstructures are prepared and the reduction factors are compared. [1] F. Koch, R. Brill, H. Maier, D. Levchuk, A. Suzuki, T. Muroga, and H. Bolt, Crystallization behavior of arc-deposited ceramic barrier coatings, Journal of Nuclear Materials 329-333 (2004) p. 1403–1406.[2] T. Chikada, A. Suzuki, Z. Yao, D. Levchuk, H. Maier, T. Terai, and T. Muroga, Deuterium permeation behavior of erbium oxide coating on austenitic, ferritic, and ferritic/martensitic steels, Fusion Engineering and Design 84 (2009) p. 590 - 592. |