Preparation of Aluminum Specimens
- Grind with 240-grit SiC water-cooled paper, 240 rpm, 5 lbs. (20N) per specimen, until co-planar
- Polish with 9-µm Diamond on an Ultra-Pol (silk) cloth, 150 rpm, 5 lbs/specimen, 5 minutes (contra rotation)
- Polish with 3-µm Diamond on a Trident cloth, 150 rpm, 5 lbs/specimen, 4 minutes (contra rotation)
- Polish with 1-µm Diamond on a Trident cloth, 150 rpm, 5 lbs/specimen, 3 minutes (contra rotation)
- Polish with 0.05-µm Colloidal Silica on a Microclothpad, 120 rpm, 5 lbs/specimen, 3 minutes (contra rotation)
- (Contra: Head and platen rotate in opposite directions)
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