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Bulk Annealing of Moly Permalloy Foils

IP.com Disclosure Number: IPCOM000091662D
Original Publication Date: 1968-Apr-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Christian, SG: AUTHOR

Abstract

Annealing of rolled temper foil at temperatures higher than 1750 degrees F is enabled by first coating the foil with magnesium methylate in a methanol base to a thickness not to exceed fifteen millionths of an inch. The magnesium methylate dries to a thin adherent film of magnesium oxide after the solvent is driven off. The foil is wound upon insulated rolls having one flange removed and, in rolled temper condition, subjected to an annealing cycle of approximately 16-20 hours at temperatures ranging from 100 degrees to 1950 degrees F. This method permits bulk annealing of foil at relatively low cost, and without welding of adjacent turns as will occur without the protective coating of magnesium oxide.

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Bulk Annealing of Moly Permalloy Foils

Annealing of rolled temper foil at temperatures higher than 1750 degrees F is enabled by first coating the foil with magnesium methylate in a methanol base to a thickness not to exceed fifteen millionths of an inch. The magnesium methylate dries to a thin adherent film of magnesium oxide after the solvent is driven off. The foil is wound upon insulated rolls having one flange removed and, in rolled temper condition, subjected to an annealing cycle of approximately 16- 20 hours at temperatures ranging from 100 degrees to 1950 degrees F. This method permits bulk annealing of foil at relatively low cost, and without welding of adjacent turns as will occur without the protective coating of magnesium oxide.

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