Crystallization behavior of arc-deposited ceramic barrier coatings

Koch, F.; Brill, Robert H.; Maier, H.; Levchuk, D.; Suzuki, Akihiro; Muroga, T.; Bolt, H.

doi:10.1016/j.jnucmat.2004.04.206

Cited by 57 publications

(26 citation statements)

References 12 publications

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“…Oxygen was introduced into the main chamber, forming an Er 2 O 3 coating. During the deposition RF-induced bias voltages of -150 V was applied on the sample to enhance crystallinity [11]. 1.4 μm thick coatings were deposited on one side or both sides of the substrate.…”

Section: Coating Methodsmentioning

confidence: 99%

“…For the examination of protium concentration, a nuclear reaction of H( 15 N, γα) 12 C was performed by a tandem-type Van der Graf accelerator at the Micro Analysis Laboratory, Tandem accelerator (MALT) at the University of Tokyo [11]. The protium concentration was determined via γ-ray intensity using a semiconductor detector.…”

Section: Measurement Of Hydrogen Isotope Concentration Distribution Bmentioning

confidence: 99%

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Measurement of hydrogen isotope concentration in erbium oxide coatings

Sato

Chikada

Matsuzaki

et al. 2014

Fusion Engineering and Design

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Hydrogen isotope concentrations in erbium oxide coatings fabricated by filtered arc deposition and metalorganic decomposition have been investigated using nuclear reaction analysis and secondary ion mass spectroscopy. It was found that deuterium concentration in the coatings fabricated by filtered arc deposition was 300-500 atomic parts per million, whereas the deuterium concentration in the coating fabricated by metal-organic decomposition was approximately 2.0 × 10 4 atomic parts per million due to hydrogen trapping by carbon impurities. Deuterium concentrations in the coatings by filtered arc deposition increased with increasing depth in accordance with the increase of grain boundary area density. An in-plane deuterium distribution of the coating by secondary ion mass spectroscopy proved the segregation with a net-like structure, indicating that the deuterium diffused through the grain boundaries.

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Section: Coating Methodsmentioning

confidence: 99%

Section: Measurement Of Hydrogen Isotope Concentration Distribution Bmentioning

confidence: 99%

Measurement of hydrogen isotope concentration in erbium oxide coatings

Sato

Chikada

Matsuzaki

et al. 2014

Fusion Engineering and Design

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“…15) Feasibility of the coating with Er 2 O 3 and Y 2 O 3 on V-4Cr-4Ti was demonstrated by EB-PVD, 15) Arc Source Plasma Deposition 46) and RF sputtering. 47) In addition to the physical deposition methods, in-situ coating with Er 2 O 3 on V-4Cr-4Ti is being developed.…”

Section: Mhd Coating Developmentmentioning

confidence: 99%

Vanadium Alloys for Fusion Blanket Applications

Muroga

2005

Mater. Trans.

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Vanadium alloys are attractive candidate structural materials for breeding blanket of fusion reactors because of their low activation properties and high temperature strength. Studies on various blanket designs are being carried out using vanadium alloys as structural materials and liquid lithium or molten salt Flibe as breeding and coolant materials. Recently significant progress in fabrication technology has been made for vanadium alloys through a program of producing large ingots of high purity V-4Cr-4Ti (NIFS-HEATs). Fundamental understandings on the effects of interstitial impurities (C, N, O) on mechanical properties, radiation effects on microstructure and mechanical properties, corrosion and compatibility in various environments were enhanced. New promising candidates were identified for the MHD insulator coating. Among the remaining critical issues are the effects of transmutant helium on mechanical properties and development of long life MHD coating. Development of vanadium alloys will be carried out in coordination with IFMIF and ITER-TBM schedules as essential tools for verification of their performance in fusion blanket environments.

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“…About 1 μm Er 2 O 3 film is deposited by a filtered arc deposition device described in [13] and [16]. A schematic view of the device is shown in Fig.…”

Section: Deposition Of Er 2 O 3 Coatingmentioning

confidence: 99%

Deuterium permeation behavior of erbium oxide coating on austenitic, ferritic, and ferritic/martensitic steels

Chikada

Suzuki

Yang

et al. 2009

Fusion Engineering and Design

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Tritium permeation barrier is required in fusion blanket for reduction of loss of fuel and health hazard. In this study, deuterium permeation experiments have been 2 performed on four kinds of steels and erbium oxide coatings fabricated by a filtered arc deposition method. The permeation flux of uncoated samples shows diffusion-limited regime in the temperature range 573−723 K and the permeability is corresponding to literature data. The coated samples deposited at room temperature have been tested at 773 K. It is found that the coatings suppress the deuterium permeation to a close level in spite of different types of steel substrates. In addition, the exponent of the driving pressure slightly changes compared to the uncoated sample. However, the permeation regime is still near diffusion limited.

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Crystallization behavior of arc-deposited ceramic barrier coatings

Cited by 57 publications

References 12 publications

Measurement of hydrogen isotope concentration in erbium oxide coatings

Measurement of hydrogen isotope concentration in erbium oxide coatings

Vanadium Alloys for Fusion Blanket Applications

Deuterium permeation behavior of erbium oxide coating on austenitic, ferritic, and ferritic/martensitic steels

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