Project #5
Evaluate cleanliness test methods
05/05/2003
Superconducting wire
0.25 inches hexagonal
Small
Less than 1 lb
Wire drawing
bundling multiple strands, evacuation, wire drawing
220
Electro clean, acids, Inproclean 1300
Intermittent cleanliness and no effective means to test surface for adequate cleanliness
Multiple filaments bundled together must bond together with further processing. Contamination hampers bonding.
In vacuum if necessary
overnight
Metallographic inspection after processing
We are seeking a test technique that is sensitive to low levels of contamination and can run continuous at line speeds; We have produced a series of parts that have been cleaned with different processes and we hope to measure cleanliness with OSEE.
Thirteen supplied parts were analyzed using a Photo Emission Tech. Inc Surface Quality Monitor SQM 100. Five readings were made on one side from each of the 13 parts submitted for analysis. OSEE was shown to be an effective analysis method in comparing the various cleanliness of the 13 supplied parts.