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Title: Development of electrical insulator coatings for fusion power applications

Abstract

In the design of liquid-metal cooling systems, corrosion resistance of structural materials and magnetohydrodynamic (MHD) force and its subsequent influence on thermal hydraulics and corrosion are major concerns. The objective of this study is to develop stable corrosion-resistant electrical insulator coatings at the liquid-metal/structural-material interface, with emphasis on electrically insulating coatings that prevent adverse MHD-generated currents from passing through the structural walls. Vanadium and V-base alloys (V-Ti or V-Ti-Cr) are potential materials for structural applications in a fusion reactor. Insulator coatings inside the tubing are required when the system is cooled by liquid metals. Various intermetallic films were produced on Types 304 and 316 stainless steel, V, V-5Ti, and V-20 Ti, V-5Cr-5Ti and V-15Cr-5Ti, and Ti. The intermetallic layers were developed by exposure of the materials to liquid lithium of 3-5 at.% and containing dissolved metallic solutes (e.g., Al, Be, Mg, Si, Ca, Pt, and Cr) at temperatures of 650-880{degrees}C. Subsequently, electrical insulator coatings were produced by reaction of the reactive layers with dissolved nitrogen in liquid lithium or by air oxidation under controlled conditions at 600-1000{degrees}C. These reactions converted the intermetallic layers to electrically insulating oxide/nitride or oxy-nitride layers.

Authors:
; ;  [1]
  1. Argonne National Lab., IL (United States); and others
Publication Date:
OSTI Identifier:
197871
Report Number(s):
CONF-940664-
TRN: 95:005767-0049
Resource Type:
Conference
Resource Relation:
Conference: ISFNT-3: international symposium on fusion nuclear technology, Los Angeles, CA (United States), 27 Jun - 1 Jul 1994; Other Information: PBD: 1994; Related Information: Is Part Of Third international symposium on fusion nuclear technology; PB: 362 p.
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 70 PLASMA PHYSICS AND FUSION; STAINLESS STEEL-304; COATINGS; STAINLESS STEEL-316; VANADIUM; VANADIUM BASE ALLOYS; TITANIUM; TITANIUM ALLOYS; CHROMIUM ALLOYS; PIPES; ELECTRICAL INSULATION; MHD CHANNELS; FLUID FLOW; PRESSURE DROP; PROTECTIVE COATINGS

Citation Formats

Park, J H, Domenico, T, and Dragel, G. Development of electrical insulator coatings for fusion power applications. United States: N. p., 1994. Web.
Park, J H, Domenico, T, & Dragel, G. Development of electrical insulator coatings for fusion power applications. United States.
Park, J H, Domenico, T, and Dragel, G. 1994. "Development of electrical insulator coatings for fusion power applications". United States.
@article{osti_197871,
title = {Development of electrical insulator coatings for fusion power applications},
author = {Park, J H and Domenico, T and Dragel, G},
abstractNote = {In the design of liquid-metal cooling systems, corrosion resistance of structural materials and magnetohydrodynamic (MHD) force and its subsequent influence on thermal hydraulics and corrosion are major concerns. The objective of this study is to develop stable corrosion-resistant electrical insulator coatings at the liquid-metal/structural-material interface, with emphasis on electrically insulating coatings that prevent adverse MHD-generated currents from passing through the structural walls. Vanadium and V-base alloys (V-Ti or V-Ti-Cr) are potential materials for structural applications in a fusion reactor. Insulator coatings inside the tubing are required when the system is cooled by liquid metals. Various intermetallic films were produced on Types 304 and 316 stainless steel, V, V-5Ti, and V-20 Ti, V-5Cr-5Ti and V-15Cr-5Ti, and Ti. The intermetallic layers were developed by exposure of the materials to liquid lithium of 3-5 at.% and containing dissolved metallic solutes (e.g., Al, Be, Mg, Si, Ca, Pt, and Cr) at temperatures of 650-880{degrees}C. Subsequently, electrical insulator coatings were produced by reaction of the reactive layers with dissolved nitrogen in liquid lithium or by air oxidation under controlled conditions at 600-1000{degrees}C. These reactions converted the intermetallic layers to electrically insulating oxide/nitride or oxy-nitride layers.},
doi = {},
url = {https://www.osti.gov/biblio/197871}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {12}
}

Conference:
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