Formation of Pyrophoric Fragments

Abstract

An empirical correlation was developed to predict pyrophoric sparking from two properties: (1) the standard free energy of formation per oxygen atom in the metal oxide and (2) the metal oxide volume compared with metal volume. A simple impact test was developed to study large pyrophoric pellets and the formation of free flying fragments in the laboratory. The paper describes the test and reports test results for cerium, misch metal, zirconium, and titanium. Each of the metals exhibited different threshold conditions for initiation of pyrophoric sparking. An experimental criterion was defined as the lower glow temperature.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1973
Accession Number
AD0765447

Entities

People

  • Warren W. Hillstrom

Organizations

  • Ballistic Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Cerium
  • Chemistry
  • Combustion
  • Elements
  • Energy
  • Free Energy
  • Ignition
  • Inorganic Chemicals
  • Materials
  • Metal Oxides
  • Misch Metal
  • Oxides
  • Particle Size
  • Particles
  • Physical Properties
  • Pyrophoric Materials
  • Titanium

Readers

  • Environmental Engineering
  • Explosive Engineering.
  • Plasma Physics.