REDUCTION AND CONSOLIDATION OF SUPERIOR QUALITY MOLYBDENUM ALLOYS

Abstract

Thermitic reduction of molybdenum trioxide with calcium was successfully scaled-up and reguli weighing 50 pounds each were produced in a 14-inch diameter bomb. Techniques were developed for the electron beam melting of hydrogen-reduced molybdenum powder. Although this material contains low interstitial elements, it exhibited severe grain boundary brittleness. Physical properties of these single crystals are being determined. The electron beam melting of the thermitically-reduced molybdenum presented difficulties; primarily because of the melting configuration. The use of a remote electron beam source will be attempted to overcome power interruptions caused by volatilization of the occluded free calcium metal and calcium oxide. Additional future studies will include attempts to refine the as-cast grain size through the addition of grain inhibitors during the melting operation. (Author)

Document Details

Document Type
Technical Report
Publication Date
Sep 30, 1960
Accession Number
AD0284815

Entities

People

  • Edmund Baroch
  • James Wong
  • Stephen Yih

Tags

Communities of Interest

  • Counter IED
  • Weapons Technologies

DTIC Thesaurus Topics

  • Brittleness
  • Crystals
  • Diameters
  • Electron Beam Melting
  • Electron Beams
  • Electrons
  • Elements
  • Grain Boundaries
  • Grain Size
  • Materials
  • Mechanical Properties
  • Melting
  • Molybdenum
  • Molybdenum Alloys
  • Physical Properties
  • Single Crystals

Readers

  • Metallurgy
  • Pulsed Power and Plasma Physics.
  • Surface Engineering/Surface Coating Technology.

Technology Areas

  • Directed Energy
  • Directed Energy - Pulsed-Laser Deposition
  • Microelectronics
  • Microelectronics - Graphene