Accession Number:

AD0755899

Title:

Studies of Graphite Vaporization Using a Modulated Beam Mass Spectrometer

Descriptive Note:

Final technical rept. 15 Apr 1971-14 Apr 1972

Corporate Author:

AVCO SYSTEMS DIV WILMINGTON MA

Report Date:

1972-09-01

Pagination or Media Count:

38.0

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.

Subject Categories:

  • Guided Missile Trajectories, Accuracy and Ballistics
  • Guided Missile Reentry Vehicles

Distribution Statement:

APPROVED FOR PUBLIC RELEASE