Work

Three-dimensional multimodal imaging and analysis of biphasic microstructure in a Ti–Ni–Sn thermoelectric material

Year: 2015

Type: article

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.

Source: APL Materials

DOI: 10.1063/1.4931764

Authors: Jason E. Douglas, McLean P. Echlin, William C. Lenthe, Ram Seshadri, Tresa M. Pollock

Institution: University of California, Santa Barbara

Language: English

Topic: Advanced Thermoelectric Materials and Devices

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,200

Funders: National Science Foundation, Air Force Research Laboratory