Studies of Graphite Vaporization Using a Modulated Beam Mass Spectrometer

Abstract

A set of experiments employing a mass spectrometer to study the kinetics and thermodynamics of graphite vaporization are described. Evidence for the existence of small amounts of C10, C11, C14, and C15 in the vapors over hot graphite at about 3000K is presented and discussed. Reflection of C3 vapor by graphite surfaces has been shown to occur without condensation or exchange interaction for surface temperatures in the range 1000K less than Ts ;less than 2700K. Isotopic labelling has been employed to demonstrate significant exchange between C3 molecules condensed on the surface and atoms from the graphite substrate. A mass spectrum for C3 is presented.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1972
Accession Number
AD0755899

Entities

People

  • Frederick N. Bourgelas
  • Warren C. Steele

Tags

Communities of Interest

  • Advanced Electronics
  • C4I
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Ablation
  • Air Force
  • Carbon Carbon Composites
  • Chemistry
  • Graphitic Materials
  • Heat Energy
  • Mass Spectra
  • Mass Spectrometers
  • Mass Spectrometry
  • Materials
  • Materials Laboratories
  • Materials Science
  • Measurement
  • New York
  • Spectrometry
  • Thermodynamic Properties
  • Thermodynamics

Fields of Study

  • Chemistry

Readers

  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.
  • Thin Film Deposition Science.

Technology Areas

  • Fully Networked C3