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Calcium Oxide Coating on Vanadium Alloys in Liquid Lithium

Published online by Cambridge University Press:  17 March 2011

J.-H. Park ,
K. Natesan  and
D. L. Smith
J.-H. Park
Affiliation:
Argonne National Laboratory, Argonne, IL 60439, USA
K. Natesan
Affiliation:
Argonne National Laboratory, Argonne, IL 60439, USA
D. L. Smith
Affiliation:
Energy Technology Division and Technology Development Division
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Abstract

We have fabricated CaO coatings on vanadium metal and various vanadium alloys (V-10Cr, V-1Ti, V-4Cr-4Ti, and V-5Cr-5Ti), for use in liquid metal blankets of fusion reactors. Initially, by monitoring weight change as a function of time, oxygen was charged into the vanadium alloys (rectangular sample, 2 x 1 x 0.1 cm) at 710°C by flowing Ar-O2 gas. Oxygen-charged samples were exposed in 2.8 at.% Ca-Li at temperatures of 600 and 700°C for times between 50 and 120 h. The thickness of the in-situ-formed CaO was 13 to 30 m in the experimental conditions. Thicker CaO films were formed at higher oxygen contents and 700°C, while thinner CaO films were formed at lower oxygen contents and 600°C. The data show promise for in-situ formation of CaO layers on V alloys for the fusion blanket application.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 697: Symposium P – Surface Engineering 2001--Fundamentals and Applications , January 2001 , P5.5
Copyright
Copyright © Materials Research Society 2002

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References

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