Boron Nitride and Its Precursors

Abstract

The objective was to develop processible preceramic polymers amenable to transformation into pure boron nitride for applications as fibers and coatings. Pyrolysis of B-tri (amino)-N-tris (trimethylsily) - borazine gave a fusible BN precursor amenable to continuous filament fiber drawing. These were transformed into BN ceramic fibers. From B, B', B'' - trichloroborazine and hexamethyldisilazane was obtained a soluble/nonfusible BN precursor utilized for coatings applications on carbon and alumina fibers. Linear 2-, 3-, and 4-BN systems were synthesized and evaluated. Functional linear BN compounds were prepared. Reactions of the materials synthesized were studied and operative mechanisms postulated.

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Document Details

Document Type
Technical Report
Publication Date
Feb 14, 1991
Accession Number
ADA233538

Entities

People

  • K. L. Paciorek

Tags

DTIC Thesaurus Topics

  • Carbon Fibers
  • Ceramic Materials
  • Chemical Compounds
  • Chemistry
  • Classification
  • Coatings
  • Fibers
  • Filaments
  • Materials Science
  • Military Research
  • New York
  • Nitrogen
  • Precursors
  • Procurement
  • Pyrolysis
  • Security
  • Technical Ceramics

Fields of Study

  • Materials science

Readers

  • Organic Chemistry
  • Reinforced Composite Materials