X-ray induced auger electron spectroscopic studies on aluminum metal surface films in aluminum/iron oxide thermites
The aluminum and iron oxide surfaces of Al/Fe/sub 3/O/sub 4/ thermite in powder and pressed pellet form were studied before and after accelerated aging at 180/sup 0/C by x-ray photoelectron spectroscopy (XPS). The Al/sub 2/O/sub 3/ surface film thicknesses on Al metal were deduced from the intensity ratio of Al K-LL Auger signals induced by x-ray radiation on Al/sub 2/O/sub 3/ and Al metal. Based on the mean free path of 16.5 A for Al KLL Auger electrons, the oxide thickness on aluminum flakes before mixing with Fe/sub 3/OFe/sub 3/O/sub 4/ was estimated to be 8-9 A. A slight oxidation was observed on the aluminum surface after mixing with Fe/sub 3/O/sub 4/ at room temperature. Hot pressing of this mixture at 425/sup 0/C for 7 minutes increased the oxide film to 31 A. This surface oxide film seemed to protect the Al metal and further aging at 180/sup 0/C did not cause significant oxide growth. A layer of carboxylate was detected on the aluminum surface from the C ls XPS signal. The presence of an Fe 2p/sub 3/2/ signal indicated the presence of Fe/sup +2/ and Fe/sup +3/. A weak hydroxyl signal was also observed; this was attributed to slight moisture contamination of the Fe/sub 3/O/sub 4/ surface.
- Research Organization:
- Mound Plant (MOUND), Miamisburg, OH (United States)
- DOE Contract Number:
- AC04-76DP00053
- OSTI ID:
- 5417692
- Report Number(s):
- MLM-2711(OP); CONF-800713-9
- Resource Relation:
- Conference: 7. international pyrotechnics seminar, Vail, CO, USA, 14 Jul 1980
- Country of Publication:
- United States
- Language:
- English
Similar Records
Aluminum particle surface studies in Al/Cu/sub 2/O by electron spectroscopy for chemical analysis and Auger electron spectroscopy
Al/Cu/sub 2/O thermite compatibility studies by x-ray photoelectron and x-ray induced Auger spectroscopy
Related Subjects
ALUMINIUM
PHYSICAL RADIATION EFFECTS
ALUMINIUM OXIDES
HOT PRESSING
SURFACE COATING
IRON OXIDES
AUGER ELECTRON SPECTROSCOPY
FILMS
POWDER METALLURGY
THICKNESS
ALUMINIUM COMPOUNDS
CHALCOGENIDES
DEPOSITION
DIMENSIONS
ELECTRON SPECTROSCOPY
ELEMENTS
FABRICATION
IRON COMPOUNDS
MATERIALS WORKING
METALLURGY
METALS
OXIDES
OXYGEN COMPOUNDS
PRESSING
RADIATION EFFECTS
SPECTROSCOPY
TRANSITION ELEMENT COMPOUNDS
360206* - Ceramics
Cermets
& Refractories- Radiation Effects
360201 - Ceramics
Cermets
& Refractories- Preparation & Fabrication