Mechanical Properties of Porous, High Temperature Structural Materials: Sources of Toughness in Reaction Bonded Silicon Nitride.

Abstract

Reaction bonded silicon nitride (RBSN) prepared from submicron size pure silicon powder is a micro-porous ceramic with excellent mechanical and dielectric properties for high temperature structural applications and for radomes. In this research program the mechanical properties including elastic moduli, tensile strength and fracture toughness of RBSN was experimentally studied in connection with its quasi-regular microstructure. The further ranges of microstructural features and the processes related to local fracture resistance were studied by means of two relate and quite flexible computer simulations of the reaction kinetics controlling the microstructure and the processes that control the crack paths. These results are summarized and presented in greater detail in four appended manuscripts. jg p1

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Document Details

Document Type
Technical Report
Publication Date
Oct 15, 1995
Accession Number
ADA301872

Entities

People

  • Ali S. Argon
  • John S. Haggerty

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Cellular Structures
  • Ceramic Materials
  • Chemical Kinetics
  • Chemical Reactions
  • Elastic Properties
  • Materials
  • Materials Engineering
  • Materials Processing
  • Materials Science
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Modulus Of Elasticity
  • Molecular Dynamics
  • Stress Strain Relations
  • Three Dimensional
  • Two Dimensional

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.
  • Technical Research and Report Writing.