Recent progress in the development of electrically insulating coatings for a liquid lithium blanket

Pint, Bruce A.; Tortorelli, P.F.; Jankowski, Alan F.; Hayes, Jeffrey P.; Muroga, T.; Suzuki, Akihiro; Yeliseyeva, Olga; Чернов, В. М.

doi:10.1016/j.jnucmat.2004.04.010

Cited by 93 publications

(63 citation statements)

References 44 publications

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“…Also, the both selection of coating material and coating process were necessary to comply with the advanced breeding blanket system. Some ceramic materials such as CaO, Y 2 O 3 , CaZrO 3 , AlN and Er 2 O 3 have been studied historically as the candidate materials for the insulating coating [3,4]. Based on these studies, Er 2 O 3 was selected as one of the candidate materials for the insulator coating for reducing the MHD pressure drop because of high compatibility with liquid Li and high electrical resistivity [4].…”

Section: Introductionmentioning

confidence: 99%

“…Some ceramic materials such as CaO, Y 2 O 3 , CaZrO 3 , AlN and Er 2 O 3 have been studied historically as the candidate materials for the insulating coating [3,4]. Based on these studies, Er 2 O 3 was selected as one of the candidate materials for the insulator coating for reducing the MHD pressure drop because of high compatibility with liquid Li and high electrical resistivity [4]. In the previous studies, the various small insulator coatings to investigate the coating characteristics were developed by Physical Vapor Deposition (PVD) methods via RF-sputtering and arc source plasma author's e-mail: hishinuma.yoshimitsu@nifs.ac.jp * ) This article is based on the presentation at the 21st International Toki Conference (ITC21).…”

Section: Introductionmentioning

confidence: 99%

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Microstructure of Oxide Insulator Coating before and after Thermal Cycling Test

Hishinuma

Murakami

Matsuda

et al. 2012

Plasma and Fusion Research

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Erbium oxide (Er 2 O 3 ) was shown to be a high potential candidate for tritium permeation barrier and electrical insulator coating for advanced breeding blanket systems such as liquid Li, Li-Pb or molten-salt blankets. Recently, we succeeded to form Er 2 O 3 coating layer on large interior surface area of metal pipe using Metal Organic Chemical Vapor Deposition (MOCVD) process. In this paper, we investigated the microstructure of Er 2 O 3 coating layer on stainless steel 316 (SUS 316) plate before and after heat treatments with hydrogen or argon gases. From the results of TEM observations, we confirmed that Er 2 O 3 coating layer with 700 nm thickness was formed on the SUS 316 plate and this layer was identified to poly-crystal phase because the diffraction fleck which was arranged like a ring was observed in the selected electron diffraction pattern. No macroscopic defects such as crack and peeling in Er 2 O 3 coating layer were observed before and after thermal cycling test. The change of microstructure of the Er 2 O 3 coating layer on before and after heat cycling test was reported.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microstructure of Oxide Insulator Coating before and after Thermal Cycling Test

Hishinuma

Murakami

Matsuda

et al. 2012

Plasma and Fusion Research

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“…Nuclear fusion reactor has been focused on the new energy system [1], and the system mainly composed of superconducting coil, plasma core, and blanket system. The blanket system requires the following five conditions: (1) Not break down at high temperature.…”

Section: Introductionmentioning

confidence: 99%

“…The blanket system requires the following five conditions: (1) Not break down at high temperature. (2) Low reactivity with Li as a coolant.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cu²⁺ Ion Irradiation on Microstructure of Er₂O₃ Coating Layer Formed by MOCVD Method

et al. 2017

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Erbium oxide (Er2O3) coating is one of the promising methods to restrict tritium permeation and the magneto hydrodynamic pressure drop for advanced breeding blanket systems. Er2O3 coating layer on large interior surface area of metal pipe is deposited by using metal organic chemical vapor deposition process. In this work, the influence of Cu 2+ ion irradiation on microstructure of Er2O3 coating layer on stainless steel 316 (SUS 316) substrate by metal organic chemical vapor deposition methods was investigated using scanning electron microscopy, transmission electron microscopy observation and X-ray diffraction analysis. Microstructure observation of Er2O3 coating was carried out after 0.00-1.50 dpa Cu 2+ ion irradiation at 298 K and 773 K. Scanning electron microscopy observation of the surface area on Er2O3 thin film revealed the crack generation on surface after Cu 2+ ion irradiation. X-ray diffraction peaks were identified in Er2O3 after Cu 2+ ion irradiation transmission electron microscopy observations, the formation of interlayer between Er2O3 coating and SUS substrate was confirmed. According to transmission electron microscopy-energy dispersive spectroscopy, the interlayer includes Fe and Cr.

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“…The Er 2 O 3 coating has been investigated as insulator for liquid lithium blanket system [14,15]. Therefore there are limited data as TPB and the permeation mechanism through the coating has not been clarified yet.…”

Section: Introductionmentioning

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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Recent progress in the development of electrically insulating coatings for a liquid lithium blanket

Cited by 93 publications

References 44 publications

Microstructure of Oxide Insulator Coating before and after Thermal Cycling Test

Microstructure of Oxide Insulator Coating before and after Thermal Cycling Test

Effect of Cu²⁺ Ion Irradiation on Microstructure of Er₂O₃ Coating Layer Formed by MOCVD Method

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

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Recent progress in the development of electrically insulating coatings for a liquid lithium blanket

Cited by 93 publications

References 44 publications

Microstructure of Oxide Insulator Coating before and after Thermal Cycling Test

Microstructure of Oxide Insulator Coating before and after Thermal Cycling Test

Effect of Cu2+ Ion Irradiation on Microstructure of Er2O3 Coating Layer Formed by MOCVD Method

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

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Product

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Effect of Cu²⁺ Ion Irradiation on Microstructure of Er₂O₃ Coating Layer Formed by MOCVD Method