NIOBIUM, MOLYBDENUM, TANTALUM AND TUNGSTEN. A SUMMARY OF THEIR PROPERTIES WITH RECOMMENDATIONS FOR RESEARCH AND DEVELOPMENT

Abstract

The metals Nb, Mo, Ta and W are discussed from the aspects of: (1) physical properties, (2) mechanical characteristics at various temperatures (unalloyed metal and main alloys), and (3) oxidation behaviour. Reference is also made to the problems of protective coatings, joining and fabrication. Following the examination of the present state of knowledge, recommendations are made for research and development. A detailed study is presented of the state of knowledge of each of the metals in regard to phase diagrams, impurities (determination and effects), diffusion couples, behaviour at high temperature under exposure to different gases, and protective coatings. A bibliography of the studies of the 4 metals and their alloys is also presented.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1961
Accession Number
AD0274036

Entities

Organizations

  • AGARD

Tags

Communities of Interest

  • Advanced Electronics
  • Weapons Technologies

DTIC Thesaurus Topics

  • Chemical Synthesis
  • Chemistry
  • Composite Materials
  • Crystal Structure
  • Material Degradation Processes
  • Materials
  • Materials Engineering
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Mechanical Properties
  • Mechanical Working
  • Phase Diagrams
  • Solid Solutions
  • Tensile Strength
  • Transition Metals
  • Transition Temperature

Readers

  • Surface Engineering/Surface Coating Technology.
  • Theoretical Analysis.