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Title: X-ray induced auger electron spectroscopic studies on aluminum metal surface films in aluminum/iron oxide thermites

Abstract

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 slightmore » moisture contamination of the Fe/sub 3/O/sub 4/ surface.« less

Authors:
; ;
Publication Date:
Research Org.:
Mound Plant (MOUND), Miamisburg, OH (United States)
OSTI Identifier:
5417692
Report Number(s):
MLM-2711(OP); CONF-800713-9
DOE Contract Number:  
AC04-76DP00053
Resource Type:
Conference
Resource Relation:
Conference: 7. international pyrotechnics seminar, Vail, CO, USA, 14 Jul 1980
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 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

Citation Formats

Wang, P S, Haws, L D, and Peters, J A. X-ray induced auger electron spectroscopic studies on aluminum metal surface films in aluminum/iron oxide thermites. United States: N. p., 1980. Web.
Wang, P S, Haws, L D, & Peters, J A. X-ray induced auger electron spectroscopic studies on aluminum metal surface films in aluminum/iron oxide thermites. United States.
Wang, P S, Haws, L D, and Peters, J A. 1980. "X-ray induced auger electron spectroscopic studies on aluminum metal surface films in aluminum/iron oxide thermites". United States. https://www.osti.gov/servlets/purl/5417692.
@article{osti_5417692,
title = {X-ray induced auger electron spectroscopic studies on aluminum metal surface films in aluminum/iron oxide thermites},
author = {Wang, P S and Haws, L D and Peters, J A},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/5417692}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 1980},
month = {Tue Jan 01 00:00:00 EST 1980}
}

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