Hi,

I am performing cross-section preparation of tungsten wires of diameters 345, 155, 64, 41 µm by mechanical grinding and polishing. I am using SiC foils of different grit sizes. For coarse grinding, 200 and 68 µm grit sizes foils are being used. For middle grinding, 30 and 18 µm foils while for pre-polishing 5 µm foils are being used.

I am having problem of broken edges and cracks in the wire cross-section and it seems that defects are grinding induced. Can anyone explain me why I am having defects? Any suggestion and literature are highly appreciated.

Regards,

Hassan

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