Microscopic Study of the Influence of Impurities on Interface Bonding.

Abstract

Results are reported for two experimental areas associated with interface failure. Model layered systems, with the main emphasis on the Al-Al2O3-Graphite system, were studied for varied interface chemistry and thickness. The results show that when the interface has low resistivity fracture occurs within the graphite but when the interface resistance is high fracture occurs within the interface. This holds true for a wide range of interface chemistries and impurity doping at the interface. Introduction of an embrittling element at the interface of the low resistance interface did not change the fracture path. The second experimental area studied was the influence the interface plays on the fracture behavior of the discontinuous SiC/Al matrix composites. Both discontinuous fibers and particulate SiC dispersoids were studied. In all cases interface failure was not the dominant fracture path. The more ductile the matrix the more ductile the composite and the less interface failure. Gamma-Al2O3 was observed to be present at many of the interfaces. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jan 25, 1984
Accession Number
ADA139300

Entities

People

  • H. L. Marcus

Organizations

  • University of Texas at Austin

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Aluminum Oxides
  • Auger Electron Spectroscopy
  • Auger Electrons
  • Ceramic Materials
  • Chemical Analysis
  • Chemistry
  • Composite Materials
  • Electron Spectroscopy
  • Materials
  • Materials Engineering
  • Materials Science
  • Materials Testing
  • Metal Matrix Composites
  • Silicon Carbide
  • Spectra
  • Tensile Strength
  • Tensile Testing

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.
  • Reinforced Composite Materials
  • Thin Film Deposition Science.