Electricity: measuring and testing – Magnetic – With temperature control of material or element of test circuit
Patent
1989-07-21
1991-05-14
Snow, Walter E.
Electricity: measuring and testing
Magnetic
With temperature control of material or element of test circuit
324501, G01N 2772, G01R 3300, G01R 3100
Patent
active
050159500
ABSTRACT:
A system for nondestructive analysis of barrier coatings on electrically conductive materials includes imposition of a controlled known heat load to a localized area of the coating and measuring electrical conductivity of the underlying material at or near the localized area of the coating. The electrical conductivity of the material is affected by changes in temperature related to thermal conduction into the material through the coating. Thermal resistance of the coating and defects between the coating and the material can therefore be detected.
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Moulder John C.
Rose James H.
Iowa State University & Research Foundation, Inc.
Snow Walter E.
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