SYMPOSIA PAPER Published: 01 January 1986

Ignition of Metals and Alloys by High-Velocity Particles


The ignition of metals and alloys by impacting high-velocity particles in gaseous oxygen was investigated. A convergent/divergent nozzle was used to accelerate the flowing oxygen, which in-turn accelerated the particles to velocities greater than 305 m/s (1000 ft/s). The test sample (target) was placed at the end of the chamber in the flow path.

Aluminum 6061, Type 316 stainless steel, Type 304 stainless steel, and Inconel 718 were ignited with 1600-μm aluminum 2017 particles at elevated temperatures and pressures whereas Monel 400 could not be ignited. The ignition susceptibility of metals and alloys appeared to increase as the inlet pressure, sample temperature, and particle size were increased. Type 304 stainless steel particles required more extreme conditions for ignition of materials than similar sized aluminum particles. The results indicated that ignition and subsequent burning of the particles were required for ignition of the target materials with the possible exception of Aluminum 6061.

Author Information

Benz, FJ
NASA, Johnson Space Center, White Sands Test Facility, Laboratories Test Office, Las Cruces, NM
Williams, RE
Lockheed/EMSCO, Johnson Space Center, White Sands Test Facility, Las Cruces, NM
Armstrong, D
Lockheed/EMSCO, Johnson Space Center, White Sands Test Facility, Las Cruces, NM
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Developed by Committee: G04
Pages: 16–37
DOI: 10.1520/STP19307S
ISBN-EB: 978-0-8031-4976-2
ISBN-13: 978-0-8031-0474-7