Vaporization Kinetics and Thermodynamics of Graphite Using the High Pressure Mass Spectrometer.
Abstract
A brief review of current studies of the vaporization of graphite is presented, followed by a detailed description of our own work. Apparatus improvements are described, which allow heating of all-graphite Knudsen cells to about 3300K in vacuum without significant heating of beam system walls or objectionable outgassing. A continuously operating vacuum viewport and automatic pyrometer system is described for temperature monitoring under rapid window darkening vaporization conditions. Preliminary equilibrium ion ratio measurements are presented for the species C1 - C7 at temperatures up to 3300K. Extensive experimental results are presented on the neutral time-of-flight behavior of both carbon and low temperature gaseous species, using both the Nuclide and the Bendix mass spectrometers. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1972
- Accession Number
- AD0753713
Entities
People
- Frank T. Greene
- Jacob E. Beachey
- Thomas A. Milne
Organizations
- MRIGlobal