In-situ study of the impact of excess Cu on phase formation of half-Heusler TiNiSn
The aim is to follow the formation of TiNiCu0.1Sn from cold-pressed disks of mixed elemental powders. Sample to be heated at 3 deg/min to 900C (4-5 hr) and then left to anneal for 3-4 hours. D20 to use the ROC and blue furnace, wavelength 1.54 A, 8 < d-spacing < 0.8 A to give best trade-off between flux and d-spacing range. This is sufficient to determine phase fractions. The scientific aim is to determine the impact of the excess Cu on the reaction pathway. From ex-situ work, we do not observe any full-Heusler phase (TiNi2Sn) when using excess Cu. This is very different from the formation mechanism of TiNiSn, as recently published by us from in-situ NPD (Barczak et al. Chem Mater. DOI: 10.1021/acs.chemmater.3c00393). The proposed experiment will show if the FH phase is missing from the reaction path, or if there is a kinetic effect and it disappears more rapidly. Direct formation of the HH phase without interference of the FH would be of considerable interest for the design of TiNiSn-based thermoelectric materials. This experiment will provide key results for the PhD thesis for Mr Blair Kennedy, who is due to submit by September 2023, precluding a regular proposal.
The data is currently only available to download if you are a member of the proposal team.
The recommended format for citing this dataset in a research publication is in the following format:
BOS Jan Willem and RITTER Clemens. (2023). In-situ study of the impact of excess Cu on phase formation of half-Heusler TiNiSn. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.EASY-1132
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