METALLOGRAPHIC PREPARATION OF ZIRCALOY
A method of mechanical polishing and chemical etching, which successfully reveals both the hydride platelets and the Zircaloy structure, was developed. The specimen was wet-ground for approximates 30 seconds each on 80-, 240-, 400-, and 600-grit abrasive wheels. After wet-grinding, the specimen was ground on damp 600-grit paper with little pressure. It was then rotated by hand on microcloth with a small amount of 6 mu diamond dust abrasive and approximates 1/2 ml of ethyl alcohol. The 600-grit scratches were removed in 30 to 45 seconds and no further polishing was necessary. The polished specimen was etched with a solution of 70 ml glycerine, 15 ml HNO/sub 3/ (69.7%), 10 ml HCl (37%), and 5 ml HF (48%) at room temperature. The specimen was first rinsed in 170 to 180 deg F water, and then etched by swabbing with cotton saturated with the etchant. The swabbing and rinsing were repeated until the surface appeared bright. (H.G.G.)
- Research Organization:
- Du Pont de Nemours (E.I.) & Co. Savannah River Lab., Aiken, S.C.
- DOE Contract Number:
- AT(07-2)-1
- NSA Number:
- NSA-17-016656
- OSTI ID:
- 4752759
- Report Number(s):
- TID-16475
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-63
- Country of Publication:
- United States
- Language:
- English
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