Innovative Tungsten Alloys for Advanced Propulsion Systems

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNM04AA12C
Agency Tracking Number: 023154
Amount: $600,000.00
Phase: Phase II
Program: SBIR
Awards Year: 2004
Solicitation Year: 2002
Solicitation Topic Code: A4.02
Solicitation Number: N/A
Small Business Information
4914 Moores Mill Road, Huntsville, AL, 35811-1558
DUNS: 799114574
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Robert Hickman
 Principal Investigator
 (256) 851-7653
Business Contact
 Timothy McKechnie
Title: President
Phone: (256) 851-7653
Research Institution
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 solid and hybrid rocket, high powered electrical, beamed energy, and nuclear propulsion systems. Innovative processes for fabricating net shape, tungsten-rhenium-hafnium carbide alloy components are proposed. Tungsten is being used for its high melting temperature (6170?F) 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. 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 and creep resistance by pinning grain boundaries. In Phase I, W-Re-HfC materials and processing parameters were developed, and W-Re-HfC samples were fabricated for characterization and hoop tensile testing. In hoop tensile tests, Phase I W-Re-HfC was stronger than baseline W-Re or W. Solid rocket nozzle inserts were fabricated and are being hot fire tested at ATK-Thiokol to demonstrate non-eroding nozzles. 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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