Product Code: ICAL07_406

Cast Carbide-metal Composite Components via Laser Based Solid Freeform Fabrication
Authors:
William Hofmeister, University of Tennessee Space Institute; Tullahoma TN USA
Deepak Rajput, University of Tennessee Space Institute; Tullahoma TN USA
Lino Costa, University of Tennessee Space Institute; Tullahoma TN USA
Kate Lansford, University of Tennessee Space Institute; Tullahoma TN USA
Presented at ICALEO 2007

Titanium-tungsten-carbon base alloys are a promising candidate material for high performance propulsion systems, given their ability to form cast carbide-metal composites having a fine microstructure consisting of a dispersion of hard titanium carbide particles within a tough tungsten rich metal matrix. Given the ability to produce these high temperature non-eroding materials by laser melting mixtures of tungsten and titanium carbide powders, the fabrication of cast carbide-metal composite components via laser based solid freeform fabrication techniques is currently being explored at the Center for Laser Applications (CLA) at the University of Tennessee Space Institute (UTSI). The microstructure and properties, namely hardness and erosion resistance, of the fabricated cast carbide-metal composite components are presented in this paper.

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