#6961. Defect and phase analysis of scandium hydride by transmission electron microscopy

January 2027publication date
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Journal’s subject area:
Mechanical Engineering;
Mechanics of Materials;
Condensed Matter Physics;
Materials Science (all);
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Abstract:
Commercially available scandium hydride is shown to contain ribbon-like precipitates. Energy dispersive X-ray analysis indicates that the only significant impurity is tantalum. The ribbons, which lie on the {111} planes of the hydride, are present within the parent metal phase prior to synthesis of the hydride. Selected area electron diffraction measurements are in agreement with published X-ray data for ScH2, although the exact hydrogen stoichiometry cannot be determined from this study. Twinning on {111} was also observed. The hydride is sensitive to irradiation, and hydrogen evolution occurs during examination, but changes in the parent hydride structure were not observed.
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