Melt dispersion versus diffusive oxidation mechanism for aluminum nanoparticles: Critical experiments and controlling parameters

Applied Physics Letters

Volumn 92, Issue 1, 2008, Pages

  Levitas, Valery I ^a   Pantoya, Michelle L ^a   Dikici, Birce ^a  

^a Department of Electrical and Computer Engineering   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ALUMINA; MELTING; OXIDATION;

ALUMINA SHELL THICKNESS; DIFFUSION OXIDATION; DIFFUSIVE OXIDATION MECHANISM; MELT DISPERSION;

NANOPARTICLES;

EID: 38049004285     PISSN: 00036951     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.2824392     Document Type: Article

References (10)

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10. Current trends are to substitute the oxide shell with metals such as gold, nickel, and silver [T. J. Foley, C. E. Johnson, and K. T. Higa, Chem. Mater. CMATEX 0897-4756 16, 4086 (2005)] or C13 F27 COOH [R. J. Jouet, J. R. Carney, R. H. Granholm, H. W. Sandusky, and A. D. Warren, Mater. Sci. Technol. MSCTEP 0267-0836 22, 422 (2006)] to reduce the dead weight and initial barrier for diffusion. This is useful for some applications but not for those where the goal is to increase the reaction and flame velocity, because the strength of such shells is significantly lower compared to alumina and MDM cannot operate. Indeed, even bare Al nanoparticles with D=20 nm require more than 1 s for complete oxidation at T=900 °C (Ref.).