Differential Thermal Analysis and Gas Release Studies of Apollo 11 Samples.

Abstract

The liquidus-solidus behavior of Apollo 11 lunar fines and the evolution characteristics of CO, N2, He, Ne, and Ar were investigated by use of the combined techniques of high-vacuum differential thermal analysis (DTA) and mass spectrometry between 100 and 1500C. The DTA thermogram has shown that the lunar fines undergo partial melting over a broad range of temperature from about 915 to 1300C, with a significant initial melting of glassy and crystalline components within the fines at about 1140C. The thermal evolution curves for the noble gases have indicated that these gases come from several sources, the principal sources being the solar wind, radiogenic decay reactions, and spallation processes. (Author)

Document Details

Document Type
Technical Report
Publication Date
Nov 15, 1971
Accession Number
AD0736428

Entities

People

  • Donald E. Gilmartin
  • Frank M. Wachi
  • John Oro
  • William S. Updegrove

Organizations

  • The Aerospace Corporation

Tags

DTIC Thesaurus Topics

  • Cooperation
  • Differential Thermal Analysis
  • High Vacuum
  • Mass Spectrometry
  • Noble Gases
  • Personal Information Managers
  • Solar Wind
  • Spallation
  • Spectrometry
  • Spectroscopy
  • Thermal Analysis
  • Vacuum

Readers

  • Powder metallurgy of Titanium alloys.
  • Space Exploration and Orbital Mechanics.
  • Thermal Physics or Thermal Science.

Technology Areas

  • Space
  • Space - Orbital Debris