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1.1. Energy-dispersive X-ray spectroscopy (EDS) data
Scanning transmission electron microscopy (STEM) EDS maps were acquired from the as-deposited doped ceria film as well as six samples exposed to irradiation and/or high temperature. A summary of the exposure conditions is provided in Table 1. All raw data sets are hosted with Medeley data [2].
Table 1
Summary of sample irradiation and heat treatment conditions. Some irradiated samples were annealed weeks after the irradiation experiment to reveal the cumulative effect of irradiation and high temperature. Modified from [1].
| Sample ID | Irradiation fluence (I2+/cm2) | Irradiation temperature (°C) | Annealing temperature (°C) | Annealing time (h) |
|---|---|---|---|---|
| Sample 1 | no irradiation | no irradiation | – | – |
| Sample 2 | 1016 | 610 | – | – |
| Sample 3 | 5 × 1016 | 730 | – | – |
| Sample 4 | 5 × 1016 | 610 | – | – |
| Sample 5 | no irradiation | no irradiation | 900 | 10 |
| Sample 6 | 5 × 1016 | 610 | 900 | 10 |
| Sample 7 | 5 × 1016 | 610 | 1100 | 10 |
The dataset sample 1 contains one EDS map. The magnification was chosen so that potential 5–10 nm precipitates should be visible in the data. A cracked grain boundary was used for focusing.
The dataset sample 2 contains two EDS maps. The magnification for both maps was also chosen so that potential 5–10 nm precipitates should be visible in the data. In each case a cracked grain boundary was used for focusing.
The dataset sample 3 contains two EDS maps. The corresponding STEM high-angle annular dark-field (HAADF) images show bright contrast indicating the presence of metal precipitates and dark contrast indicating cavities. Analysis of local spectra reveals high Mo- and Pd-concentrations in the precipitates.
The dataset sample 4 contains three EDS maps. The corresponding STEM HAADF images show cracked grain boundaries, but no bright contrast. However, analysis of local spectra revealed small Pd-rich precipitates and I segregation.
The dataset sample 5 contains six EDS maps. Regions were chosen because the corresponding STEM HAADF images revealed dark and bright contrast. Analysis of the local spectra revealed the presence of Mo- and Pd-rich precipitates. Two maps show precipitates formed at the top surface of the film.
The dataset Sample 6 contains four EDS maps. Regions were chosen because the corresponding STEM HAADF images revealed dark and bright contrast. Analysis of the local spectra revealed the presence of Mo- and Pd-rich precipitates. One map shows precipitates formed at the top surface of the film.
The dataset Sample 7 contains seven EDS maps. Regions were chosen close to the interface where many precipitates were located. Analysis of the local spectra revealed the presence of two-phase precipitates with a Mo-rich and a Pd-rich phase.
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