Voorhees Research Group
ONR MURI: Understanding Corrosion in 4D
Email: rohitramanathan2020 at u dot northwestern dot edu
Office: Cook 4028
Northwestern University – Evanston, IL
Dept. of Materials Science and Engineering
Sept. 2015 – present
Cornell University – Ithaca, NY
B.S. in Materials Science and Engineering
Aug. 2011 – May 2015
Rohit is interested in developing theories and using computer simulations to understand microstructure formation and evolution in materials. His work is focused on understanding the early stages of oxidation and corrosion of alloys as part of the ONR MURI “Understanding Corrosion in 4D”.
Currently, Rohit’s research has focused on developing a model of electrochemical oxide growth that accounts for the coupling between the motion of charged defects and the electrostatic potential in the oxide film. Often, it is assumed that the oxide film is charge neutral which is only a good assumption for a thick film. Passive oxide films that form on many alloys are less than 10 nm in thickness and thus are likely to be charged. Space charge effects in oxide growth are one of many phenomena that Rohit will investigate, in collaboration with Kyoungdoc Kim and other members of the MURI team.
His initial work focused on developing a thermodynamic and kinetic model of oxide island growth and coalescence that accounts for the polydispersity of the size distribution and its evolution in time.
- R. Ramanathan, G. Ramalingam, J.H. Perepezko, P. Reinke, and P.W. Voorhees, “Evolution of NiO Island Size Distributions During the Oxidation of a Ni-5Cr Alloy: Experiment and Modeling,” ACS Appl. Mater. Interf. (2018).
- A.K. Singh, B.C. Revard, R. Ramanathan, M. Ashton, F. Tavazza, and R.G. Hennig, “Genetic algorithm prediction of two-dimensional group-IV dioxides for dielectrics,” Phys. Rev. B, 95(15), 155426 (2017).