A Study of Basic Mechanisms Involved in the Consolidation of Multiphase Nanostructured Materials.

Abstract

Programmatic achievements made under contract NOOOl4-93-0997 include: (1) demonstrating that nanostructured WC-Co powder can be thermally sprayed to form nanostructured coatings on substrate materials using the High-velocity Oxyfuel method. (2) showing that the micro structural scale of the deposited n- WC/Co coatings compares with that of bulk consolidated material (200 nm.). (3) showing that chemical changes during actual thermal spraying are completely eliminated by using an experimental gun with a high chamber pressure. (4) discovering the existence of ultrafine cobalt precipitates in WC nanograins in bulk consolidated n-WC/Co. These nanoprecipites, which result from the intimate mixing of elements at the molecular level, are believed to be important in promoting fracture toughness. (MM)

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Document Details

Document Type
Technical Report
Publication Date
Aug 15, 1995
Accession Number
ADA298635

Entities

People

  • Peter R. Strutt

Organizations

  • University of Connecticut

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Chemical Synthesis
  • Continuous Chemical Reactors
  • Electron Microscopes
  • Electron Microscopy
  • Grain Growth
  • High Resolution
  • Manufacturing
  • Materials
  • Materials Processing
  • Materials Science
  • Mechanical Working
  • Microscopes
  • Microscopy
  • Nanoparticles
  • Particles
  • Powders
  • Thermal Spraying

Readers

  • Materials Science (Mechanical Engineering).
  • Powder metallurgy of Titanium alloys.
  • Surface Engineering/Surface Coating Technology.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene