BORON-CONTENT PROFILE OF A BORON-PYROLYTIC GRAPHITE NOSE CONE MODEL

Abstract

The pyrohydrolysis method of determining boron concentration in boron-pyrolytic graphite was evaluated by the analysis of reference samples. The method was found to be applicable and was applied to the determination of the boron-content profile of a boron-pyrolytic graphite nose cone model fabricated by the graded boron composition technique. The results of the analysis conclusively show that the expected boron concentration gradient is absent and that effects on fabricability have been incorrectly attributed to such a secondary anisotropy. Kinetic arguments which favor the existence of the concentration gradient also remain open to question.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1966
Accession Number
AD0488914

Entities

People

  • D. E. Gilmartin
  • F. M. Wachi

Organizations

  • The Aerospace Corporation

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Abstracts
  • Accuracy
  • Air Force
  • Boron Carbides
  • California
  • Chemistry
  • Classification
  • Commerce
  • Corporations
  • Government (Foreign)
  • Graphitic Materials
  • Materials
  • Materials Science
  • Nose Cones
  • Noses
  • Space Systems
  • Temperature Gradients

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Reinforced Composite Materials
  • Theoretical Analysis.