From Event: SPIE Commercial + Scientific Sensing and Imaging, 2018
Traditional thermoelectric device manufacturing uses machining, assembly, and integration steps which lead to material waste and performance limitations. The approach offers little flexibility in designing thermoelectric module geometry. Additive manufacturing can overcome these challenges, but it has not been demonstrated for inorganic thermoelectric materials, particularly those geared toward mid-/high-temperature applications. This work describes selective laser melting, an additive manufacturing process which locally melts successive layers of material powder to construct three-dimensional objects. The work shows the firstever demonstrations of selective laser melting applied to half-Heusler thermoelectric materials: ZrNiSn, and Hf0.3Zr0.7CoSn0.3Sb0.7/nano-ZrO2. Laser processing parameters critically affects the formation and appearance of ingots, and we found laser energy density is useful but cannot be the single consideration for the SLM process. The fabricated ingots are generally porous with rough surfaces. They are characterized through powder XRD and TGA. The results consistently show that produced parts preserved most of the original chemical structures with small chemical changes due to decomposition and oxidation during the selective laser melting process. The work demonstrates selective laser melting is feasible for half-Heusler thermoelectric materials.
Haidong Zhang, Shanyu Wang, Patrick J. Taylor, Jihui Yang, and Saniya LeBlanc, "Selective laser melting of half-Heusler thermoelectric materials," Proc. SPIE 10663, Energy Harvesting and Storage: Materials, Devices, and Applications VIII, 106630B (Presented at SPIE Commercial + Scientific Sensing and Imaging: April 15, 2018; Published: 15 May 2018); https://doi.org/10.1117/12.2306099.
Conference Presentations are recordings of oral presentations given at SPIE conferences and published as part of the proceedings. They include the speaker's narration with video of the slides and animations. Most include full-text papers. Interactive, searchable transcripts and closed captioning are now available for 2018 presentations, with transcripts for prior recordings added daily.
Search our growing collection of more than 16,000 conference presentations, including many plenaries and keynotes.