A Thickness Gauge for Ceramic Coatings |
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Authors: | CHARLES C GORDON JOSEPH C RICHMOND |
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Affiliation: | National Bureau of Standards, Washington, D. C. |
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Abstract: | An instrument has been developed for the purpose of measuring the thickness of protective coatings of ceramic materials applied on nonmagnetic metal bases. This instrument provides a nondestructive method of measurement and can be used on metallic backings having a wide range of electrical conductivities. Also, the thickness measurement refers to a restricted area and is, therefore, applicable to curved surfaces. Although this instrument was developed primarily for the measurement of the thickness of ceramic coatings on turbine blades and other high-temperature parts of aircraft power plants, it should be generally useful in thickness measurements of paint, plastic, and other nonconducting films. |
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