ASSIGNMENT
CALPHAD predicted high performance Advanced Transparent Optical Materials (ATOM) study
Contact: Martijn Homsma, m.d.homsma@utwente.nl ; and/or Wesley van den Beld, w.t.e.vandenbeld@utwente.nl
Introduction
In studying High Entropy Alloys (HEA), complexity becomes a limiting factor for pure empirical research. In order to combat this, CALPHAD has been used to calculate and predict new interesting compositions to then deposit and study. However, this work has only been limited to macroscale approaches, with also seeing limited use for magnetron sputtered samples. This assignment looks into the calculation of new interesting alloys with a.o. CALPHAD software, which are then deposited in our labs and tested. The goal is to increase understanding in what factors play a role in specific properties, as well as the accuracy of using CALPHAD in informing new material depositions.
See also: https://doi.org/10.1557/jmr.2018.152 , https://doi.org/10.1007/978-3-319-27013-5_12 and https://doi.org/10.1016/j.calphad.2019.101647
Master Assignment
- Work with CALPHAD software (CALculation of PHAse Diagrams)
- Derive what makes an interesting (new) alloy to study
- Deposition of such layers via the Advanced Deposition Coater (ADC = PVD magnetron)
- Perform stoichiometric/compositional analysis (via experts) of deposited samples
- Characterize the resulting samples (structure, stoichiometry, purity, etc)
- Correlate calculations with experimental results and verify
Figure: Example phase diagram of CoCrFeNi-Alx [Thermo-Calc Software]