Innovative Tungsten Alloys for Advanced Propulsion Systems

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NAS8-03009
Agency Tracking Number: 023154
Amount: $70,000.00
Phase: Phase I
Program: SBIR
Awards Year: 2003
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Plasma Processes, Inc.
4914 Moores Mill Rd, Huntsville, AL, 35811
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Robert Hickman
 Principal Investigator
 (256) 851-7653
 robert@plasmapros.com
Business Contact
 Timothy McKechnie
Title: president
Phone: (256) 851-7653
Email: timmck@plasmapros.com
Research Institution
N/A
Abstract
Non-conventional technologies are needed to revolutionize space propulsion. Development of materials with improved properties is essential to increase performance and reduce cost. Advancements are needed for components in high powered electrical, beamed energy, and nuclear propulsion systems. Innovative Vacuum Plasma Spray (VPS) processes for fabricating net shape, tungsten-rhenium-hafnium carbide alloy components are proposed. Tungsten is being used for its high melting temperature and chemical stability. However, conventional tungsten materials have to be forged to get adequate properties. Forging tungsten into complex shapes is difficult and has limited its application. Tungsten alloys yield improved properties as compared to conventional unalloyed tungsten. It is well documented that small additions of rhenium improve the ductility of tungsten without significantly decreasing the melting point. Also, dispersion hardening by additions of HfC increases the high temperature strength by pinning grain boundaries. In Phase I, W-Re-HfC powders and process parameters will be developed to fabricate samples for characterization and hoop tensile testing. After optimization, nozzles will be fabricated and hot fire tested at ATK-Thiokol. Development of these materials will allow the production of components with unique properties and reduce the size, weight, and cost of propulsion systems.

* information listed above is at the time of submission.

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