Processing and Properties of Tough Silicides.

Abstract

The processing and properties of tough silicides have been investigated. Vacuum hot pressing was utilized to produce Nb5Si3/Nb laminates, while the fracture toughness of the laminates was evaluated with the use of a deformation stage situated inside of a SEM. The interface strength in such laminates was systematically varied as was the thickness of the Nb layer in order to determine the effects of such changes on the fracture behavior and toughness of such laminates. The effects of changes in test temperature on the above were also determined. Complementary experiments were conducted on in-situ composites where R-curve behavior was obtained. In addition, the effects of changes in grain size, test temperature, and alloy content, on the cleavage fracture stress and the fracture toughness were determined. The results of these experiments were used to rationalize the fracture behavior of the laminates and in-situ composites.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
May 01, 1996
Accession Number
ADA320473

Entities

People

  • John J. Lewandowski
  • Robert M. Aikin Jr

Organizations

  • Case Western Reserve University

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Chemical Analysis
  • Chemical Synthesis
  • Chemistry
  • Composite Materials
  • Electron Microscopy
  • Grain Size
  • Heat Energy
  • High Temperature
  • Hot Pressing
  • Laminates
  • Materials
  • Materials Processing
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Solid Solutions
  • Tensile Stress

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Structural Health Monitoring of Composite Structures.
  • Surface Engineering/Surface Coating Technology.