Method for providing a diffusion barrier

Details Method for providing a diffusion barrier Method for providing a diffusion barrier

1978-11-28

1980-11-11

Kendall, Ralph S.

Metal treatment

Compositions

Heat treating

204 37R, 204 52R, 176 82, 176 91R, G21B 306, C23F 702

Patent

active

042330866

ABSTRACT:
A method for providing a barrier against copper diffusion into a zirconium alloy tube which is lined with copper for the purpose of increasing the resistance of the tube to stress corrosion induced by fission products when the tube is used to fuel a nuclear reactor. The method involves the deposition of a copper lining on the zirconium alloy tube and the subsequent exposure of the lined tube to a substance such as steam, water, nickel oxide or carbon dioxide or another material which has the ability to oxidize the zirconium without oxidizing the copper. Thus, a zirconium oxide layer is developed between the zirconium alloy tube and the copper lining thereon.

REFERENCES:
patent: 2899345 (1959-08-01), Oshry
patent: 3556870 (1971-01-01), Debray et al.
patent: 4017368 (1977-04-01), Wax et al.
patent: 4093756 (1978-06-01), Donaghy
Roy, Oxidation-Resistant Coatings for Zirconium Alloys, Chem. Abs. vol. 81:28474d 8-74.

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