Meeting at GSFC
Diane Kolos (GSFC)
Jerry Clinton (SLAC/ Mfg. Engr.)
Nick Virmani (Swales/GSFC)
Frank Golden (Parlex, Dir. Of Corp. QA)
Discuss micro-sections which had several separations between barrel plating and internal layers. Some samples had missing annular rings. Evaluation of Parlex micro-sections vs. GSFC coupons.
Parlex had questions regarding the interlayer separation requirements in the referred IPC-6013 specification. Parlex indicated that they do not work to IPC-6013 and normally follow MIL-P-50884C. Both specifications have the same requirements for inter-separation. Parlex agreed that all specifications do not permit interlayer separation.
Thermal stressed micro-sections brought by Parlex were oxidized and had heavy scratches due to polishing. They could not be evaluated and have to be re-polished prior to evaluation. Polishing procedures and processes were reviewed by parlex and re-polishing was performed on part number 727, micro-section serial numbers 11 and 13. Both micro-sections were accepted and evaluated by parlex and were considered acceptable prior to re-polishing.
After polishing and evaluation S/N 11 micro-sections have clear evidence of interlayer separation. Parlex agreed to re-evaluate inspection process (details unknown). S/N 13 did not show any evidence of interlayer separation.
Parlex has some concern on the micro-section procedures used by GSFC materials lab. To resolve this issue, the GSFC rejected micro-sections and remnants of the coupons as well as Parlex’s remnants of the coupons ( for some serial numbers) will be evaluated by an independent lab.
Parlex will discuss with the independent Delson Lab in CA,
the dates for shipping the coupons and micro-sections.
Parlex will send the new micro-sectioning procedures by email for review, which contains details missing from the previous procedures.