|About this Abstract
||Materials Science & Technology 2020
||Thermodynamic Properties, Structure and Phase Stabilities of Special Alloys
||Examining the Oxidation in NiAl Binary Alloys Using Cellular Automata
||Indranil Roy, Pratik Ray, Ganesh Balasubramanian
|On-Site Speaker (Planned)
The atomistic approaches to modeling oxidation on metallic surfaces are limited in the scale of systems they are able to model, while macroscopic and kinetic methods do not account for the nanoscale effects. A mesoscale technique such as cellular automata (CA) bridges that gap, and holds potential to describe surface oxidation phenomena that is comparable to experimental observations. Here we present results from our implementation of the 2-dimensional (2D) CA method based on a stochastic approach to examine the oxidation of equiatomic nickel-aluminum (NiAl) alloy. A rapid increase in metal oxide formation followed by gradual decrease in the oxidation rate implies that the reaction becomes progressively slower with time as a primary layer of oxide forms on the surface. Further, we generate the stress field create solely due to oxidation and discuss the advantage of the CA approach in the context of complementary experimental findings.
||Planned: At-meeting proceedings