Development of electrical insulator coatings: In-situ electrical resistance measurements on CaO-coated V-5%Cr-5%Ti in liquid lithium
- Argonne National Lab., IL (United States)
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.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 47766
- Report Number(s):
- DOE/ER-0313/16; ON: DE95003404; TRN: 95:011296
- 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
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