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Title: Development of intermetallic 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 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 V, V-t, and V-20 Ti, V-5Cr-t and V-15Cr-t, and Ti, and Types 304 and 316 stainless steel. The intermetallic layers were developed by exposure of the materials to liquid lithium of 3--5 at.% and containing dissolved metallic solutes at temperatures of 416--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. This coating method could be applied to a commercial product. The liquid metal can be used over and over because onlymore » the solutes are consumed within the liquid metal. The technique can be applied to various shapes because the coating is formed by liquid-phase reaction. This paper will discuss initial results on the nature of the coatings and their in-situ electrical resistivity characteristics in liquid lithium at high temperatures.« less

Authors:
; ; ;
Publication Date:
Research Org.:
Argonne National Lab., IL (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10154740
Report Number(s):
ANL/ET/CP-81527; CONF-940664-1
ON: DE94012647; TRN: 94:012072
DOE Contract Number:  
W-31109-ENG-38
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: Mar 1994
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ELECTRICAL INSULATION; DESIGN; COATINGS; THERMONUCLEAR REACTOR MATERIALS; CORROSION RESISTANCE; MAGNETOHYDRODYNAMICS; VANADIUM ALLOYS; VANADIUM BASE ALLOYS; INTERMETALLIC COMPOUNDS; ELECTRIC CONDUCTIVITY; CERAMICS; LIQUID METALS; HYDRAULICS; HEAT TRANSFER; 700480; COMPONENT DEVELOPMENT; MATERIALS STUDIES

Citation Formats

Park, J H, Domenico, T, Dragel, G, and Clark, R. Development of intermetallic coatings for fusion power applications. United States: N. p., 1994. Web.
Park, J H, Domenico, T, Dragel, G, & Clark, R. Development of intermetallic coatings for fusion power applications. United States.
Park, J H, Domenico, T, Dragel, G, and Clark, R. 1994. "Development of intermetallic coatings for fusion power applications". United States. https://www.osti.gov/servlets/purl/10154740.
@article{osti_10154740,
title = {Development of intermetallic coatings for fusion power applications},
author = {Park, J H and Domenico, T and Dragel, G and Clark, R},
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 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 V, V-t, and V-20 Ti, V-5Cr-t and V-15Cr-t, and Ti, and Types 304 and 316 stainless steel. The intermetallic layers were developed by exposure of the materials to liquid lithium of 3--5 at.% and containing dissolved metallic solutes at temperatures of 416--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. This coating method could be applied to a commercial product. The liquid metal can be used over and over because only the solutes are consumed within the liquid metal. The technique can be applied to various shapes because the coating is formed by liquid-phase reaction. This paper will discuss initial results on the nature of the coatings and their in-situ electrical resistivity characteristics in liquid lithium at high temperatures.},
doi = {},
url = {https://www.osti.gov/biblio/10154740}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {3}
}

Conference:
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