MODIFICATION
93 -- PIP INFILTRATION OF COMPOSITE PREFORMS
- Notice Date
- 6/8/2012
- Notice Type
- Modification/Amendment
- NAICS
- 334413
— Semiconductor and Related Device Manufacturing
- Contracting Office
- NASA/Glenn Research Center, 21000 Brookpark Road, Cleveland, OH 44135
- ZIP Code
- 44135
- Solicitation Number
- NNC12436235Q
- Response Due
- 6/12/2012
- Archive Date
- 6/8/2013
- Point of Contact
- Sandra L Gerlach, Buyer, Phone 216-433-3764, Fax 216-433-5489, Email Sandra.L.Gerlach@nasa.gov - Dorothy E Viancourt, Purchasing, Phone 216-433-2532, Fax 216-433-5489, Email Dorothy.E.Viancourt@nasa.gov
- E-Mail Address
-
Sandra L Gerlach
(Sandra.L.Gerlach@nasa.gov)
- Small Business Set-Aside
- N/A
- Description
- This is a modification to the synopsis entitled PIP INFILTRATION OF COMPOSITE PREFORMS which was posted on May 31, 2012. You are notified that the following changes are made: Q: Are the 3D preforms already partially densified via CVI, and if so, what is the remaining % open porosity? A: The composite preforms are partially densified and contain ~30% open porosity. Under ideal conditions it is possible to infiltrate these preforms with ~50% particulates. Of course that depends on viscosity of particulate filled polymer, particle size distribution and pore size distribution of the composite preform. However, NASA will consider recommendations from the vendor concerning particle loading and maximum density. Q: NASA specifies the conditions for one heat treatment cycle in argon at 1650C (RFQ states 16500C); are the other cycles also to be conducted in argon? A: If N is the# of PIP cycles required for achieving maximum density in the composite preform, then after N-1 cycles, the infiltrated composite preform needs to be heat treated at 16500C in argon. There is no need to conduct all PIP cycles in argon. However, high temperature PIP processing in argon is preferable to avoid amorphous phases and oxygen impurities in the PIP matrix. PIP processing in nitrogen or air causes contamination of PIP matrix and degradation of composite preforms. There is no temperature requirement for the other cycles. However, the PIP processing temperature should yield crystalline and dense matrix with least amount of oxygen impurities. Clarification: In the current RFQ there is no requirement for seal coating. The due date for responses is not extended. Documents related to this procurement will be available over the Internet. These documents will reside on a World Wide Web (WWW) server, which may be accessed using a WWW browser application. The Internet site, or URL, for the NASA/GRC Business Opportunities home page is http://prod.nais.nasa.gov/cgi-bin/eps/bizops.cgi?gr=D&pin=22 Offerors are responsible for monitoring this site for the release of the solicitation and any amendments. Potential offerors are responsible for downloading their own copy of the solicitation and amendments (if any).
- Web Link
-
FBO.gov Permalink
(https://www.fbo.gov/spg/NASA/GRC/OPDC20220/NNC12436235Q/listing.html)
- Record
- SN02770612-W 20120610/120608235251-4612024aed5209e5703252a98ebad080 (fbodaily.com)
- Source
-
FedBizOpps Link to This Notice
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