DEVELOPMENT OF A POROUS METALLIC COMPOSITE MATERIAL

Abstract

The feasibility of making a porous metallic composite by bonding hollow metal spheres was demonstrated. Methods were developed for making hollow metal spheres by metallizing the surface of ceramic and plastic spheres. Hollow glass microspheres in the 1. 0 to 5. 0-mil diam. range were metallized by electroless Cu, Ni, and Ag processes. The building up of a sufficient metal thickness on these microspheres for bonding into a porous metallic composite appears impractical. Hollow clay spheres and hollow alumina bubbles were metallized by both electroless processes and by electrolytic processes. Expanded polystyrene spheres were metallized by electrolytic processes. Heavy metal coatings of 1 to 5 mils thickness were electroplated on 137-mil diam polystyrene spheres. The polystyrene was then completely removed by heating to 600-650 F. Ni, Cu, and Ag were successfully electroplated to form hollow metal spheres by this process. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jun 24, 1960
Accession Number
AD0265637

Entities

People

  • Angelo H. Rossetti
  • George H. Bischoff

Tags

DTIC Thesaurus Topics

  • Composite Materials
  • Dielectric Polymers
  • Electrolytic Processes
  • Heavy Metals
  • Materials
  • Materials Processing
  • Metal Coatings
  • Metals
  • Plastics
  • Polystyrenes
  • Reinforced Plastics
  • Resins
  • Spheres
  • Thermoplastic Composites

Fields of Study

  • Materials science

Readers

  • Aerosol Science/Aerosol Physics
  • Surface Engineering/Surface Coating Technology.