Impact of heat treatment on surface chemistry of Al-coated Eurofer for application as anti-corrosion and T-permeation barriers in a flowing Pb–15.7Li environment

Konys, J.; Krauß, W.; Holstein, N.; Lorenz, Julia; Wulf, Sven-Erik; Bhanumurthy, K.

doi:10.1016/j.fusengdes.2012.03.042

Cited by 29 publications

(6 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The state of the art in the field of coatings for TBMs is given by Al 2 O 3 -forming surface alloys or Al 2 O 3 coatings processed by a variety of techniques. The most studied methods include hot-dip aluminization, chemical vapor deposition, plasma spray, sol-gel deposition, and electrochemical processing [21][22][23][24][25][26]. Some of the disadvantages of these methods include high processing temperatures, low adhesive strength, low deposition rates, or poor compatibility with complex shapes.…”

Section: Introductionmentioning

confidence: 99%

Efficient hydrogen and deuterium permeation reduction in Al₂O₃ coatings with enhanced radiation tolerance and corrosion resistance

et al. 2018

View full text Add to dashboard Cite

One of the major bottlenecks in the development of the breeding blanket of the DEMO fusion reactor is the suppression of tritium permeation through structural steels as well as their protection against dissolution-corrosion by interaction with high temperature heavy liquid metals. Reduction of tritium permeation and corrosion of structural steels are crucial issues in order to enhance reactor safety and avoid operational implications. As a solution to these two daunting challenges, we developed multifunctional alumina coatings capable to tackle, at the same time, tritium permeation and Pb-Li corrosion. The coatings are deposited by pulsed laser deposition and are essentially amorphous, with nanocrystalline inclusions. By optimizing the deposition process, we provide experimental evidence that PLD-grown alumina yields a permeation reduction factor for hydrogen and deuterium well above 10 4 , even after electron irradiation, and a suitable protection against corrosion by the Pb-16Li eutectic. Given these results, the multifunctional, PLD-grown alumina coatings stand out as a viable solution to some of the long-lasting issues related to fusion technologies.

show abstract

Section: Introductionmentioning

confidence: 99%

Efficient hydrogen and deuterium permeation reduction in Al₂O₃ coatings with enhanced radiation tolerance and corrosion resistance

et al. 2018

View full text Add to dashboard Cite

show abstract

“…With reduced activation ferritic-martensitic (FM) steel as the structural material, the DCLL is limited to ~475°C metal temperature because Fe and Cr readily dissolve in Pb-Li above 500°C and Eurofer 97 plugged a Pb-Li loop at 550°C [2][3]. The use of Al containing coatings or alloys has been shown to reduce mass loss of Fe-base alloys in Pb-Li [4][5][6][7][8][9][10][11], typically by the formation of an Al-rich oxide (typically LiAlO 2 ) that inhibits dissolution [7,8,9,11,12]. Of course, Al-containing FeCrAl alloys were developed 50 years ago at General Electric for fuel cladding [13] and an oxide dispersion strengthened (ODS) version to enable higher temperature structural applications was commercialized 35 years ago [14].…”

Section: Introductionmentioning

confidence: 99%

Alloying and coating strategies for improved Pb–Li compatibility in DEMO-type fusion reactors

Unocic

Pint

2014

Journal of Nuclear Materials

View full text Add to dashboard Cite

Two strategies were explored to improve the Pb~16Li compatibility of Fe-base alloys for a fusion energy blanket system. The use of thin (~50µm) Al-rich diffusion coatings on Grade 92 (9Cr-2W) substrates significantly reduced the mass loss in static Pb-Li capsule tests for up to 5,000 h at 600° and 700°C. However, significant Al loss was observed at 700°C. Thicker coatings with Fe-Al intermetallic layers partially spalled after exposure at 700°C, suggesting that coating strategies are limited to lower temperatures. To identify compositions for further alloy development, model FeCrAlY alloys with 10-20 wt.%Cr and 3-5%Al were exposed for 1,000 h at 700°C. There was little effect on mass change of varying the Cr content, however, alloys with <5% Al showed mass losses in these experiments. For both coatings and FeCrAl alloys, the surface reaction product was LiAlO 2 after exposure and cleaning.

show abstract

“…An Al diffusion zone (FeAl) between the alumina coating and substrate is thus desired as a self-healing coating [5,9]. Hot dip aluminizing process followed by heat treatment under oxidizing environment leads to generation of a-Al 2 O 3 + FeAl coatings on 9Cr steel substrates [10,11].…”

Section: Introductionmentioning

confidence: 99%

Compatibility study of plasma grown alumina coating with Pb–17Li under static conditions

Jamnapara

Sree

Kumar

et al. 2014

Journal of Nuclear Materials

View full text Add to dashboard Cite

Impact of heat treatment on surface chemistry of Al-coated Eurofer for application as anti-corrosion and T-permeation barriers in a flowing Pb–15.7Li environment

Cited by 29 publications

References 5 publications

Efficient hydrogen and deuterium permeation reduction in Al₂O₃ coatings with enhanced radiation tolerance and corrosion resistance

Efficient hydrogen and deuterium permeation reduction in Al₂O₃ coatings with enhanced radiation tolerance and corrosion resistance

Alloying and coating strategies for improved Pb–Li compatibility in DEMO-type fusion reactors

Compatibility study of plasma grown alumina coating with Pb–17Li under static conditions

Contact Info

Product

Resources

About

Impact of heat treatment on surface chemistry of Al-coated Eurofer for application as anti-corrosion and T-permeation barriers in a flowing Pb–15.7Li environment

Cited by 29 publications

References 5 publications

Efficient hydrogen and deuterium permeation reduction in Al2O3 coatings with enhanced radiation tolerance and corrosion resistance

Efficient hydrogen and deuterium permeation reduction in Al2O3 coatings with enhanced radiation tolerance and corrosion resistance

Alloying and coating strategies for improved Pb–Li compatibility in DEMO-type fusion reactors

Compatibility study of plasma grown alumina coating with Pb–17Li under static conditions

Contact Info

Product

Resources

About

Efficient hydrogen and deuterium permeation reduction in Al₂O₃ coatings with enhanced radiation tolerance and corrosion resistance

Efficient hydrogen and deuterium permeation reduction in Al₂O₃ coatings with enhanced radiation tolerance and corrosion resistance