Three-dimensional multimodal imaging and analysis of biphasic microstructure in a Ti–Ni–Sn thermoelectric material
Open Access
- 1 September 2015
- journal article
- conference paper
- Published by AIP Publishing in APL Materials
- Vol. 3 (9) , 096107
Abstract
The three-dimensional microstructure of levitation melted TiNi1.20Sn has been characterized using the TriBeam system, a scanning electron microscope equipped with a femtosecond laser for rapid serial sectioning, to map the character of interfaces. By incorporating both chemical data (energy dispersive x-ray spectroscopy) and crystallographic data (electron backscatter diffraction), the grain structure and phase morphology were analyzed in a 155 μm × 178 μm × 210 μm volume and were seen to be decoupled. The predominant phases present in the material, half-Heusler TiNiSn, and full-Heusler TiNi2Sn have a percolated structure. The distribution of coherent interfaces and high-angle interfaces has been measured quantitatively.Keywords
Funding Information
- National Science Foundation (1144085, DMR-1121053)
- Air Force Research Laboratory (FA9550-12-1-0445)
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