Development and performance of aluminum nitride insulating coatings for application in a lithium environment

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The blanket system is one of the most important components in a fusion reactor because it has a major impact on both the economics and safety of fusion energy. Based on the requirement that an electrically insulating coating on the first-wall structural material must minimize the magnetohydrodynamic pressure drop that occurs during the flow of liquid metal in a magnetic field, aluminum nitride (AlN) is considered a candidate coating material for the lithium self-cooled blanket concept. Detailed investigations were conducted on the fabrication, metallurgical microstructure, compatibility in liquid Li, and electrical characteristics of AlN as a coating material. A nonindentation ... continued below

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14 p.

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Natesan, K.; Reed, C.B.; Rink, D.L. & Haglund, R.C. October 1, 1997.

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Description

The blanket system is one of the most important components in a fusion reactor because it has a major impact on both the economics and safety of fusion energy. Based on the requirement that an electrically insulating coating on the first-wall structural material must minimize the magnetohydrodynamic pressure drop that occurs during the flow of liquid metal in a magnetic field, aluminum nitride (AlN) is considered a candidate coating material for the lithium self-cooled blanket concept. Detailed investigations were conducted on the fabrication, metallurgical microstructure, compatibility in liquid Li, and electrical characteristics of AlN as a coating material. A nonindentation technique was used to evaluate the hardness of the coated samples in as-coated condition, after a hardening treatment, and after exposure to Li. Lithium compatibility studies were conducted in static systems by exposure of AlN-coated specimens for several time periods, at various temperatures, and in various lithium chemistries. Electrical resistance of the specimens was measured at room temperature before and after exposure to liquid Li. This paper discusses the results from ongoing activities on the development of AlN coatings.

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14 p.

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INIS; OSTI as DE98050527

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  • 8. international conference on fusion reactor materials (ICFRM), Sendai (Japan), 26-31 Oct 1997

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  • Other: DE98050527
  • Report No.: ANL/ET/CP---92764
  • Report No.: CONF-971090--
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 554845
  • Archival Resource Key: ark:/67531/metadc697114

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • October 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Dec. 15, 2015, 12:06 p.m.

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Natesan, K.; Reed, C.B.; Rink, D.L. & Haglund, R.C. Development and performance of aluminum nitride insulating coatings for application in a lithium environment, article, October 1, 1997; Illinois. (digital.library.unt.edu/ark:/67531/metadc697114/: accessed April 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.