Formation of Pyrophoric Fragments
Memorandum rept. Jun 1971-Dec 1972
ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD
Pagination or Media Count:
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.
- Physical Chemistry