منابع مشابه
Water diffusion coefficients during copper electropolishing
Cu electropolishing was studied using a rotating disc electrode in a variety of phosphoric acid-based electrolytes, including several with ethanol and other species added as diluents. Diluents allow a wider range of water concentrations and electrolyte viscosities to be accessed and also reduce the removal rate during Cu electropolishing, simplifying possible application to damascene processing...
متن کاملIn situ X-ray nanotomography of metal surfaces during electropolishing
A low voltage electropolishing of metal wires is attractive for nanotechnology because it provides centimeter long and micrometer thick probes with the tip radius of tens of nanometers. Using X-ray nanotomography we studied morphological transformations of the surface of tungsten wires in a specially designed electrochemical cell where the wire is vertically submersed into the KOH electrolyte. ...
متن کاملSuperiority of Electropolishing over Chemical Polishing on High Gradients
Electropolishing (EP) offers a smoother surface, and that makes us expect high gradients in superconducting niobium cavities. EP has a little bit complicated procedure and needs annealing to avoid the hydrogen Q-disease. On the other hand, chemical polishing (CP) is easier and cheaper, so widely used in many laboratories. For the conventional field gradients (,z~ 5 MV/m) in storage rings (TRIST...
متن کاملElectropolishing of the Anl Deflecting Cavity for the Aps Upgrade∗
Studies on the application of electropolishing (EP) of the ANL superconducting deflecting cavity have shown promising results. This cavity geometry is a squashed single-cell cavity with Y-end group waveguide as well as on-cell LOM damper. The cavity works at TM110-like deflecting mode, in which the iris between the cavity cell and the Y-end group is the highest magnetic field region. Before EP,...
متن کاملSmall-Scale Pattern Size Control during Metal Electropolishing
In our previous work, we have studied the pattern formation during the electropolishing of both isotropic and anisotropic materials. Both models predict stable hexagonal and striped patterns and are in qualitative agreement with experiments. In this paper, we study the smallscale pattern size control during electropolishing. Our study shows that applied voltage, surface diffusion and surface de...
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ژورنال
عنوان ژورنال: Nature
سال: 1953
ISSN: 0028-0836,1476-4687
DOI: 10.1038/171931a0