Development of electrically insulating coatings for service in a lithium environment

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Several experiments were conducted to develop electrically insulating CaO coatings on a V-4Cr-4Ti alloy for application in an Li environment. The coatings were developed by vapor phase transport external to Li, and also in-situ in an Li-Ca environment at elevated temperature. In the vapor phase study, several geometrical arrangements were examined to obtain a uniform coating of Ca on the specimens, which were typically coupons measuring 5 to 10 x 5 x 1 mm. After Ca deposition from the vapor phase, the specimens were oxidized in a high-purity argon environment at 600 C to convert the deposited metal into oxide. ... continued below

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12 p.

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Natesan, K.; Uz, M. & Wieder, S. May 17, 2000.

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Description

Several experiments were conducted to develop electrically insulating CaO coatings on a V-4Cr-4Ti alloy for application in an Li environment. The coatings were developed by vapor phase transport external to Li, and also in-situ in an Li-Ca environment at elevated temperature. In the vapor phase study, several geometrical arrangements were examined to obtain a uniform coating of Ca on the specimens, which were typically coupons measuring 5 to 10 x 5 x 1 mm. After Ca deposition from the vapor phase, the specimens were oxidized in a high-purity argon environment at 600 C to convert the deposited metal into oxide. The specimens exhibited insulating characteristics after this oxidation step. Several promising coated specimens were then exposed to high-purity Li at 500 C for 48--68 h to determine coating integrity. Microstructural characteristics of the coatings were evaluated by scanning electron microscopy and energy-dispersive X-ray analysis. Electrical resistances of the coatings were measured by a two-probe method between room temperature and 700 C before and after exposure to Li.

Physical Description

12 p.

Notes

INIS; OSTI as DE00755852

Medium: P; Size: 12 pages

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  • 9th International Conference on Fusion Reactor Materials, Colorado Springs, CO (US), 10/10/1999--10/15/1999

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  • Report No.: ANL/ET/CP-98493
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 755852
  • Archival Resource Key: ark:/67531/metadc712011

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  • May 17, 2000

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  • Sept. 12, 2015, 6:31 a.m.

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  • April 6, 2017, 7:58 p.m.

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Natesan, K.; Uz, M. & Wieder, S. Development of electrically insulating coatings for service in a lithium environment, article, May 17, 2000; Illinois. (digital.library.unt.edu/ark:/67531/metadc712011/: accessed September 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.