THE DEVELOPMENT OF PROCESSING TO PRODUCE FINE PARTICLE ALUMINUM WITH A PASSIVE COATING OF ALF3

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N/A
Agency Tracking Number: 15476
Amount: $50,000.00
Phase: Phase I
Program: SBIR
Awards Year: 1991
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Materials And Electrochemical
7960 S Kolb Road, Tucson, AZ, 85706
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Dr J C Withers
 Principal Investigator
 (602) 574-1980
Business Contact
Phone: () -
Research Institution
N/A
Abstract
THE HEATS OF DETONATION OF ALUMINIZED EXPLOSIVES AND PROPELLANTS ARE, IN GENERAL, CONSIDERABLY HIGHER THAN FOR NON ALUMINIZED MATERIALS. HOWEVER, THE INHERENT OXIDE ON THE ALUMINUM INTERFERES WITH AND DELAYS THE DETONATION PROCESS. IT IS POSSIBLE THAT THE SUBSTITUTION OF A FLUORIDE (ALF3) COATING FOR THE OXIDE IN THE PRODUCTION OF THE ALUMINUM POWDERS WOULD LEAD TO EARLIER PARTICIPATION OF THE ALUMINUM IN THE DETONATION. A PROCESS IS PROPOSED THAT IN-SITU PRODUCES ANALF3 COATING ON SPHERICAL SHAPED ALUMINUM PARTICLES WHICH FORMS A PASSIVE FILM TO OXIDATION. TO AVOID PRODUCING ALF3 PARTICLES AND THE SUBLIMATION OF AN ALF3 COATING, WHICH OCCURS AT 1291 DEGREES C, IT ISNECESSARY TO CONDENSE ALUMINUM IN THE ABSENCE OF A FLUORINE ATMOSPHERE AND REACT THE FLUORINE WITH ALUMINUM PARTICLES BELOW THE ALF3 SUBLIMATION TEMPERATURE. THIS PROGRAM WILL DEVELOP AND DEMONSTRATE PROCESSING TO PRODUCE A PASSIVE ALF3 FILM ON ALUMINUM PARTICLESAND CHARACTERIZE AS TO ALF3 THICKNESS, PERFECTION AND STABILITY OF THE COATING IN THE PRESENCE OF MOISTURE FOLLOWED BY DELIVERY OF SAMPLES TO THE NAVY.

* information listed above is at the time of submission.

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