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588 vs. 384 (polyimide & carbon)

588 vs. 384 (polyimide & carbon). C. T. Mueller J. G. Coffer 6/7/2000. Topics. Microscopic examination of 588 & 384 fiber samples much more “damage” to polyimide coating on 588 sample vs. 384 sample Resistance measurements on 588, 384, & CO858XB 1A (no carbon coating)

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588 vs. 384 (polyimide & carbon)

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  1. 588 vs. 384 (polyimide & carbon) C. T. Mueller J. G. Coffer 6/7/2000

  2. Topics • Microscopic examination of 588 & 384 fiber samples • much more “damage” to polyimide coating on 588 sample vs. 384 sample • Resistance measurements on 588, 384, & CO858XB 1A (no carbon coating) • Evaluation of NASA Goddard XPS data • concluded that XPS data does not support the presence of SiC on either sample (588 or 384)

  3. CDO588XD Surface contamination? approximately periodically-spaced marks in the polyimide coating

  4. CDO588XD

  5. CDO588XD

  6. CDO384XB Surface contamination

  7. CDO384XB Some marks, but not as many nor as deep Surface contamination

  8. Electrical Resistance Measurements • CDO588XD 13.0 kohm/cm • CDO384XB 12.3 kohm/cm • OC-1260 (no carbon coating) CO858XB1A >40 Mohms/cm • Recall: other UNCABLED carbon-coated fiber showed 15 kohm/cm

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