INVESTIGATION OF BONDING IN OXIDE-FIBER (WHISKER) REINFORCED METALS

Abstract

Sessile drop experiments were conducted in order to investigate the wetting (contact angle), between pure nickel and single crystal alpha-Al2O3. Over 16 experiments were conducted in order to evaluate the performance of the apparatus and to establish the most accurate experimental procedure. Of the various factors affecting the con tact angle, the impurities in the nickel were found to have the most pronounced effect. A contact angle of 123.5 degrees was recorded for ultra pure Ni at 1500C. Shear tests were conducted on the solidified Ni drops in order to assess the relative bond strengths, which were found to vary between 510 psi and 9,250 psi. The fracture modes and the chemical etching of the alpha-Al2O3 surfaces by molten nickel are discussed. The results of this investigation will be used ultimately to develop high strength bonds in nickel alpha-Al2O3 (whisker) composite materials.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1963
Accession Number
AD0409518

Entities

People

  • Willard H. Sutton

Organizations

  • General Electric

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Air Force Facilities
  • Aluminum Oxides
  • Chemical Reactions
  • Composite Materials
  • Fabrication
  • Graphitic Materials
  • High Temperature
  • Jet Propulsion
  • Manufacturing
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Materials Testing
  • Military Research
  • Munitions
  • Shear Tests

Readers

  • Materials Science and Engineering.
  • Mechanical Engineering/Mechanics of Materials.
  • Powder metallurgy of Titanium alloys.