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Material Characterization of Plasma-Treated Aluminum Particles via Different Gases

Published online by Cambridge University Press:  12 March 2019

Chi-Chin Wu Open the ORCID record for Chi-Chin Wu [Opens in a new window] ,
Kelsea K. Miller ,
Scott D. Walck  and
Michelle Pantoya
Chi-Chin Wu*
Affiliation:
Energetic Materials Science Branch, Lethality Division, Weapons and Materials Research Directorate, US Army Research Laboratory, Aberdeen Proving Ground, Maryland21005
Kelsea K. Miller
Affiliation:
Department of Mechanical Engineering, Texas Technical University, Lubbock, Texas79409
Scott D. Walck
Affiliation:
Survice Engineering Co., Materials and Manufacturing Science Division, Weapons and Materials Research Directorate, US Army Research Laboratory, Aberdeen Proving Ground, Maryland21005
Michelle Pantoya
Affiliation:
Department of Mechanical Engineering, Texas Technical University, Lubbock, Texas79409
*
*(Email: chi-chin.wu.civ@mail.mil)
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Abstract

This work describes exploration of mitigating the parasitic amorphous alumina (Al2O3) shell of aluminum nanoparticles (n-Al) and modifying the surface using different plasmas, leading to n-Al with thinner shell and different coatings including carbons and oxidizing salt called aluminum iodate hexahydrate (AIH), respectively. The approach exploits a prototype atmospheric non-thermal plasma reactor with dielectric barrier discharge (DBD) configuration for nanoparticle surface modifications using n-Al of 80 nm average diameter as an example. Preliminary results indicate that the amorphous Al2O3 shell surrounding the active aluminum core can be mitigated with inert plasmas by as much as 40% using either helium (He) or argon (Ar). The particle surface becomes carbon-rich with carbon monoxide (CO) / He plasmas. By immersing the plasma-treated n-Al in an iodic acid (HIO3) solution, AIH crystals can be formed on the n-Al surface. Transmission electron microscopy (TEM) is used as a major tool to study the details of the modified surface morphologies, diffraction patterns, and chemical composition of the modified n-Al. The results demonstrate effective surface passivation of n-Al via atmospheric plasma techniques.

Keywords

transmission electron microscopy (TEM)Alenergetic materialnanostructure
Type
Articles
Information
MRS Advances , Volume 4 , Issue 27: Processing and Manufacturing , 2019 , pp. 1589 - 1595
Copyright
Copyright © Materials Research Society 2019 

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References

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