Optical measurements of shock-induced chemical reactions in mixed aluminum-nickel powder

Conference · Tue Jan 01 00:00:00 EST 1985

OSTI ID:5626752

Boslough, M B; Graham, R A; Webb, D M

Optical pyrometer and high-speed photography experiments have been carried out to determine the temperature and temporal-spatial evolution of a chemical reaction zone in shock-loaded, nickel-aluminum powder mixtures. The temperature generated is about 5000/sup 0/K, and the reaction occurs on a 100 nanosecond or faster time scale. Experimental results are compared to numerical calculations, which suggest that there are threshold shock pressures and temperatures of about 15 GPa and 500/sup 0/C which are required to initiate the strong exothermic reaction. Further, excessive pressure appears to inhibit reaction. This observation is in agreement with previous experiments in which nickel-aluminum alloys were recovered from shock-loaded mixtures.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5626752
• Report Number(s): SAND-85-0498C; CONF-850736-21; ON: DE85014705
• Resource Relation: Conference: American Physical Society topical conference on shock waves in condensed matter, Spokane, WA, USA, 22 Jul 1985
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
CHEMICAL REACTIONS
NICKEL ALLOYS
BINARY ALLOY SYSTEMS
BINARY MIXTURES
IMPACT SHOCK
POWDERS
PYROMETERS
SHOCK WAVES
STREAK PHOTOGRAPHY
ALLOY SYSTEMS
ALLOYS
DISPERSIONS
MEASURING INSTRUMENTS
MIXTURES
PHOTOGRAPHY
360102* - Metals & Alloys- Structure & Phase Studies