NASA SBIR 2019-I Solicitation

Proposal Summary

 19-1- Z10.03-3833
 Nuclear Thermal Propulsion
 Additive Manufacturing of Refractory Metal Alloys for Nuclear Thermal Propulsion Components
SMALL BUSINESS CONCERN (Firm Name, Mail Address, City/State/Zip, Phone)
Geoplasma Research, LLC
111 Veterans Memorial Boulevard, Suite 1600
Metairie, LA 70005- 3044
(504) 831-1900

Principal Investigator (Name, E-mail, Mail Address, City/State/Zip, Phone)

Dr. Subhayu Sen
111 Veterans Memorial Blvd., Suite 1600 Metairie, LA 70005 - 3044
(256) 690-5322

Business Official (Name, E-mail, Mail Address, City/State/Zip, Phone)

Mrs. Amy Trosclair
111 Veterans Memorial Blvd., Suite 1600 Metairie, LA 70005 - 3044
(504) 405-3386
Estimated Technology Readiness Level (TRL) :
Begin: 2
End: 3
Technical Abstract (Limit 2000 characters, approximately 200 words)

For long duration deep space missions nuclear thermal propulsion (NTP) enable much superior propulsion capability compared to chemical propulsion, reduces travel time for deep space missions, and circumvents the primary concern of crew exposure to hazardous deep space radiation. A critical requirement for specific components of such reactors is the high temperature capability of structural materials to withstand temperatures greater than 1500 K over long durations. Certain refractory metal alloys are prime candidates for such applications due to their low creep rates, strength retention at high temperatures, and no embrittlement due to irradiation. However, the primary challenge associated with such alloys is their low room temperature ductility and extreme difficulty in manufacturing these alloys to desired shapes and with intricate features. To address this challenge GeoPlasma Research proposes to develop the necessary refractory metal feedstocks and a corresponding low temperature Fused Deposition Modeling (FDM) Additive Manufacturing (AM) technology that will overcome the problems associated with traditional manufacturing of refractory alloys and enable manufacturing of NTP components. During Phase 1 GeoPlasma Research will concentrate on refractory alloys dispersion strengthened by thermodynamically stable phases. The competitive advantage of the proposed GeoPlasma Research technology includes combination of a high strength refractory metal feedstock and an AM technology that circumvents the issues such as cracking from thermal stresses associated with more traditional laser or electron beam AM technology.  In addition, the AM technology circumvents microstructural modifications during the build process by avoiding melt solidification of the powder feedstock. Such a cradle to grave process from development of refractory alloy feedstocks to finished products will enable NASA’s NTP requirements for deep space mission.

Potential NASA Applications (Limit 1500 characters, approximately 150 words)

Specific NTP components consists of neutron reflectors, cooling channels, and control drums to name a few. Other than NTP, targeted NASA applications include in-space propulsion components for apogee insertion, attitude control, orbit maintenance, repositioning of satellites/spacecraft, reaction control systems, and descent/ascent engines, microgravity containment crucibles and cartridges. In addition, other aerospace applications include net-shape fabrication of refractory metals for rocket nozzles, heat pipes, and propulsion subcomponents.

Potential Non-NASA Applications (Limit 1500 characters, approximately 150 words)

Properties such as corrosion resistance enables use of refractory metals alloys as medical implants. Their high temperature stability and strength retention enables application across a wide spectrum such as structural furnace components, hot stamping tools, die inserts for castings and welding electrodes. The high density of refractory metals makes them suitable as a  radioactive shields.  

Duration: 6

Form Generated on 06/16/2019 23:09:27