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Title: Development of electrical insulator coatings: In-situ electrical resistance measurements on CaO-coated V-5%Cr-5%Ti in liquid lithium

Abstract

The electrical resistance of CaO coatings produced on V-5%Cr-5%Ti by exposure of the alloy to liquid Li that contained 4 at.% dissolved Ca was measured as a function of time at temperatures of 250 to 698{degrees}C. The solute element, Ca in liquid Li, reacted with the alloy substrate at 420{degrees}C to produce a CaO coating. The resistance of the coating layer was {approx} 0.4 and 35.7 {Omega} at 267 and 698{degrees}C, respectively. Thermal cycling between 267 and 698{degrees}C changed the resistance of the coating layer, which followed insulator behavior. These results and those reported previously suggest that thin homogeneous coatings can be produced on variously shaped surfaces by controlling the exposure time, temperature, and composition of the liquid metal. This coating method is applicable to reactor components of various shapes (e.g., inside/outside of tubes, complex geometrical shapes) because the coating is formed by liquid-phase reaction. The liquid metal can be used over and over because only the solutes are consumed within the liquid metal.

Authors:
; ;  [1]
  1. Argonne National Lab., IL (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
47766
Report Number(s):
DOE/ER-0313/16
ON: DE95003404; TRN: 95:011296
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Sep 1994; Related Information: Is Part Of Fusion materials semiannual progress report for the period ending March 31, 1994; PB: 534 p.
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION; 36 MATERIALS SCIENCE; VANADIUM BASE ALLOYS; SURFACE COATING; CHROMIUM ALLOYS; TITANIUM OXIDES; PROGRESS REPORT; LIQUID METALS; CALCIUM OXIDES; ELECTRICAL INSULATION; THERMONUCLEAR REACTOR MATERIALS

Citation Formats

Park, J H, Dragel, G, and Clark, R W. Development of electrical insulator coatings: In-situ electrical resistance measurements on CaO-coated V-5%Cr-5%Ti in liquid lithium. United States: N. p., 1994. Web.
Park, J H, Dragel, G, & Clark, R W. Development of electrical insulator coatings: In-situ electrical resistance measurements on CaO-coated V-5%Cr-5%Ti in liquid lithium. United States.
Park, J H, Dragel, G, and Clark, R W. 1994. "Development of electrical insulator coatings: In-situ electrical resistance measurements on CaO-coated V-5%Cr-5%Ti in liquid lithium". United States.
@article{osti_47766,
title = {Development of electrical insulator coatings: In-situ electrical resistance measurements on CaO-coated V-5%Cr-5%Ti in liquid lithium},
author = {Park, J H and Dragel, G and Clark, R W},
abstractNote = {The electrical resistance of CaO coatings produced on V-5%Cr-5%Ti by exposure of the alloy to liquid Li that contained 4 at.% dissolved Ca was measured as a function of time at temperatures of 250 to 698{degrees}C. The solute element, Ca in liquid Li, reacted with the alloy substrate at 420{degrees}C to produce a CaO coating. The resistance of the coating layer was {approx} 0.4 and 35.7 {Omega} at 267 and 698{degrees}C, respectively. Thermal cycling between 267 and 698{degrees}C changed the resistance of the coating layer, which followed insulator behavior. These results and those reported previously suggest that thin homogeneous coatings can be produced on variously shaped surfaces by controlling the exposure time, temperature, and composition of the liquid metal. This coating method is applicable to reactor components of various shapes (e.g., inside/outside of tubes, complex geometrical shapes) because the coating is formed by liquid-phase reaction. The liquid metal can be used over and over because only the solutes are consumed within the liquid metal.},
doi = {},
url = {https://www.osti.gov/biblio/47766}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {9}
}

Technical Report:
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