MODIFICATION
A -- BRAZING OF METALLIC/NONMETALLIC FABRICATED MATERIALS
- Notice Date
- 8/25/2005
- Notice Type
- Modification
- NAICS
- 332811
— Metal Heat Treating
- Contracting Office
- NASA/George C. Marshall Space Flight Center, Procurement Office, Marshall Space Flight Center, AL 35812
- ZIP Code
- 35812
- Solicitation Number
- NNM04122136Q
- Response Due
- 9/29/2005
- Archive Date
- 8/25/2006
- Point of Contact
- Kellie D. Craig, Contracting Officer, Phone (256) 544-5906, Fax (256) 544-6062, Email Kellie.D.Craig@nasa.gov
- E-Mail Address
-
Email your questions to Kellie D. Craig
(Kellie.D.Craig@nasa.gov)
- Description
- This is a modification to the synopsis entitled BRAZING OF METALLIC/NONMETALLIC FABRICATED MATERIALS NNM04122136Q which was posted on August 11, 2005. You are notified that the following changes are made: AMENDMENT 001 answers the following questions: Q1. What is the ceramic material, and does it have a specification A1. The ceramic material is Alumina 998. Q2. What are the specific alloy designations and forms for the metals (tantalum, molybdenum and copper) A2. No alloy, we request 3N or better for the sheaths as well as for the couplers. Q3. The functional requirements and operating conditions for the braze joints seem to suggest that the R&D is directed towards a particular application or type of application. Is that a correct assumption A3. We are not directing toward any specific process, so active metal braze or metallization is at the discretion of the company. If that is true, then is general information about the component designs available? In particular, is there available information about design requirements for the braze joint, such as thicknesses and configurations of the components being joined The preferred joint design for the ceramic to metal braze will be an important consideration for the proposal. The choice of joining process between brazing and welding for the molybdenum to molybdenum, or the tantalum to tantalum joints will be influenced, if not determined, by access limitations to the joint, hence the interest in configurations. Q4. In service, is the primary function of the joints to be a hermetic seal with minimal mechanical loading; or will there be thermal cycle induced loads from temperature variations in the service temperature range (227C), and perhaps launch vibrational loading A4. Hermetic seal minimal loading, max 30 psi internal pressure at temperature 7 psi typical. Q5. Are the "deliverables" for this brazing R&D work to be developed processes for the different material combinations, including joint designs, that meet the 900C exposure after a 30 minute (or less) ramp to temperature? Or, are the results to be both developing the processes and a source to fabricate components A5. MSFC deliverables include documentation of the brazing process and the brazed items. 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/MSFC Business Opportunities home page is http://prod.nais.nasa.gov/cgi-bin/eps/bizops.cgi?gr=D&pin=62 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
-
Click here for the latest information about this notice
(http://prod.nais.nasa.gov/cgi-bin/eps/bizops.cgi?gr=D&pin=62#117076)
- Record
- SN00879846-W 20050827/050825212940 (fbodaily.com)
- Source
-
FedBizOpps.gov Link to This Notice
(may not be valid after Archive Date)
| FSG Index | This Issue's Index | Today's FBO Daily Index Page |