Selected Mechanical and Physical Properties of Boron Filaments.

Abstract

Results are presented from an investigation to characterize boron filament with respect to selected mechanical and physical properties. The investigation of 12 different filaments included examination by metallographic techniques and the determination of mechanical properties over the temperature range from room temperature to 2500 deg F (1644 deg K) in argon, air, and vacuum. The study was primarily concerned with the properties of individual boron filaments produced by the deposition of boron on the surface of a fine tungsten substrate wire from a vapor composed of hydrogen and a boron halide compound. These filaments exhibited an average room-temperature strength of 350 ksi (2.42 GN/sq meters) and retained approximately two-thirds of this strength at temperatures up to 2000 deg F (1366 deg K). The range of scatter among individual tensile strength values was generally equal to the mean value of strength. An average Young's modulus value of 60 x 10(exp 3) ksi (414 GN/sq meters) was recorded.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1966
Accession Number
ADA310397

Entities

People

  • Harvey W. Herring

Organizations

  • Langley Research Center

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Ceramic Materials
  • Composite Materials
  • Compound Semiconductors
  • Hardness
  • Materials
  • Materials Processing
  • Measurement
  • Mechanical Properties
  • Mechanical Working
  • Modulus Of Elasticity
  • Physical Properties
  • Silicon Carbide
  • Statistical Analysis
  • Stress Strain Relations
  • Stresses
  • Tensile Strength
  • Vapor Deposition

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Surface Engineering/Surface Coating Technology.