Accession Number:

ADA256346

Title:

Coated Tungsten Powders for Advanced Ordnance Applications, Phase 2, SBIR.

Descriptive Note:

Final rept. Sep 1988-Jul 1991

Corporate Author:

ULTRAMET PACOIMA CA

Report Date:

1992-05-01

Pagination or Media Count:

73.0

Abstract:

In this program, Ultramet optimized and characterized a fluidized-bed chemical vapor deposition CVD process for depositing nickel and iron onto tungsten particles for potential use as kinetic energy penetrator materials. The process yields a composite powder having the nominal composition W6NiFe, in which the NiFe ratio is 73. Two relatively narrow tungsten particle size distributions were used one with a mean size of 12-15 Am, the other with a mean size of 5 um. These particle sizes facilitated fluidized-bed CVD processing, but limited the ability to consolidate the materials by liquid phase sintering LPS . Consequently, solid-state consolidation Ceracon process was used to fabricate billets from which flexure, tensile, impact, and quarter-scale ballistic specimens could be machined. Initial three-point flexure measurements were very encouraging, with modulus-of-rupture values 30-50 higher than those of commercial 9010, LPS material cut into similar bars and tested concurrently, and midspan deflections equal to those of the usually more ductile 9010 material. Tungsten powder, Composites, Chemical vapor deposition CVD, Microstructure, Powder metallurgy.

Subject Categories:

  • Coatings, Colorants and Finishes
  • Properties of Metals and Alloys
  • Fabrication Metallurgy
  • Ammunition and Explosives

Distribution Statement:

APPROVED FOR PUBLIC RELEASE