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Updates of Iowa State University . S. Dumpala , S. Broderick, A. J. Peralta and K. Rajan Mar – 11 - 2013 . Summary of Previous Al oxidation results. Oxidation of Aluminum at 450 C, 2.5 x 10- 3 Torr for 10 min. - PowerPoint PPT Presentation

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Updates of Iowa State University S. Dumpala, S. Broderick, A. J. Peralta and K. Rajan

Mar 11 - 2013 Oxidation of Aluminum at 450 C, 2.5 x 10-3 Torr for 10 min.

Interface shown from reaction of O and Al. Identify Al2O3 as bulk phase of gas-solid reaction

Use of AP results for experimental inputs into ReaxFF simulations

Summary of Previous Al oxidation results

Diffusion Profiles - APT

Environmental Chamber- APT Heater stage preheated to 500 C (sample T-300 C)

Pressure 7x 10 -5 torr for 5 min

APT Laser run at 1 nj

Different oxygen species are detected as observed earlier

Present - Al oxidation results

Study of InterfacesDiffusion Profiles - APTAlO

Al- Iso surface 95.23% Oxidation forming AlO phase compared to stoichiometric Al2O3 phase observed earlier

Different oxide species observed

Bulk Al2O3 phase Bulk Al phaseAlOXPS, HRTEM also reported formation of limiting thickness Al-deficient phase than Al2O3 at

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