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Determination of Small Thermal Expansion Coefficients by a Micrometric Dilatometer Method

B. S. Lement, C. S. Roberts, B. L. Averbach

Abstract

A method for the measurement of small thermal expansion coefficients in the vicinity of room temperature is described. The thermal expansion of Invar in the room temperature range may be reduced to zero by the elimination of impurities from the basic 36 Ni, bal. Fe composition.

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Key concepts: Dilatometer, Thermal expansion, Invar, Materials science, Impurity, Atmospheric temperature range, Thermal, Thermodynamics