Abstract
Apparatus and techniques are described which allow the preparation of metal foils several square centimeters in area with thickness as small as 2 μm. The foils retain the microstructure of the 25–50‐μm‐thick starting material and are especially useful in experiments utilizing charged particle bombardment to simulate the effects of fast neutron damage on mechanical, electrical, thermal, and mass transport properties. The thinning rate is controlled by monitoring the transmittance of 6328‐Å light passed through the electrolyte. Intermittent specimen rotation, dc voltage pulsing, and periodic adjustments in electrolyte composition permit reproducible thinning rates with point‐to‐point variations in foil thickness smaller than 20%.
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