Lect26_notes

Cbems 164 xrd sem microanalysis lecture 26 16 diamond

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Unformatted text preview: •  Polish (by hand or with automation) –  –  –  –  Use a succession of finer grit sizes Coarse - SiC - (60 - 600 grit) Fine - diamond (30µm - 1µm) Ultrafine - silica (<1µm) •  Need to take care not to contaminate finer sizes with prior coarser media •  Need to polish long enough at each grit size to entirely remove all polishing scratches from previous media size •  Metals may also be electropolished Many variables, multiple fixtures etc. CBEMS 164 – XRD, SEM & Microanalysis: Lecture 26 ! 16 Diamond Polishing! ! ! ! ! ! ! •  Can use many approaches –  Diamond impregnated cloth •  Diamond paste added to cloth •  Many different naps and textures –  Diamond impregnated copper disks •  Available down to 1 µm particle size –  Diamond impregnated mylar films •  Use water lubricant CBEMS 164 – XRD, SEM & Microanalysis: Lecture 26 ! 17 CBEMS 164 – XRD, SEM & Microanalysis: Lecture 26 ! 18 Ultrafine Polishing! ! ! ! ! ! ! •  Necessary for EBSD •  0.05µm silica in suspension •  Plentiful vendor literature Electropolishing!...
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