LM of a thermostat element

LM of a thermostat element

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Credit: ASTRID & HANNS-FRIEDER MICHLER/SCIENCE PHOTO LIBRARY

Caption: Light micrograph of a thin section from the element of a thermostat showing (from top to bottom) layers of steel, copper and brass. Changes in temperature set up stresses in the element due to the differing thermal expansivities of these component layers. The resulting deformation can be used to make or break an electrical contact. Magnification: x60 at 6x4.5cm size.

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Keywords: brass, chemical, chemistry, compound, compounds, copper, in thermostat, in thermostat element, light micrograph, lm, metal expansion, steel, thermostat element

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