Type
Text
Type
Thesis
Advisor
Hwang, David. | Zuo, Lei | Longtin, Jon
Date
2013-12-01
Keywords
Mechanical engineering | Characterization, Magnesium Silicide, thermal spray
Department
Department of Mechanical Engineering.
Language
en_US
Source
This work is sponsored by the Stony Brook University Graduate School in compliance with the requirements for completion of degree.
Identifier
http://hdl.handle.net/11401/76451
Publisher
The Graduate School, Stony Brook University: Stony Brook, NY.
Format
application/pdf
Abstract
Mg2Si has long been recognized as one of the promising thermoelectric materials; the fabrication methods are hot press, spark plasma sintering, high temperature sintering, etc. however, application of thermoelectric materials requires large scale manufacturing but traditional manufacturing process cannot reach this goal by its nature; thus we employed thermal spray technology to fabricate such thermoelectric material. In collaboration with Thermal Spray Center in Stony Brook University, we manufactured Mg¬2¬Si coatings on titanium substrate by plasma thermal spray technology. Samples were further characterized in various methods: scanning electron microscopy (SEM) exhibits the micro structures of sprayed Mg2Si coatings; X-ray spectroscopy (XRD) analysis examined the content and various thermoelectric properties by electrical conductivity measurement, thermal conductivity measurement, Seebeck Effect measurement and Hall Effect measurement. The result showed that vacuum plasma thermal spray so far has better thermoelectric properties than atmospheric plasma spray and Mg2Si has potential to increase its thermoelectric properties if proper fabrication environment and post-fabrication processes are employed. | Mg2Si has long been recognized as one of the promising thermoelectric materials; the fabrication methods are hot press, spark plasma sintering, high temperature sintering, etc. however, application of thermoelectric materials requires large scale manufacturing but traditional manufacturing process cannot reach this goal by its nature; thus we employed thermal spray technology to fabricate such thermoelectric material. In collaboration with Thermal Spray Center in Stony Brook University, we manufactured Mg¬2¬Si coatings on titanium substrate by plasma thermal spray technology. Samples were further characterized in various methods: scanning electron microscopy (SEM) exhibits the micro structures of sprayed Mg2Si coatings; X-ray spectroscopy (XRD) analysis examined the content and various thermoelectric properties by electrical conductivity measurement, thermal conductivity measurement, Seebeck Effect measurement and Hall Effect measurement. The result showed that vacuum plasma thermal spray so far has better thermoelectric properties than atmospheric plasma spray and Mg2Si has potential to increase its thermoelectric properties if proper fabrication environment and post-fabrication processes are employed. | 84 pages
Recommended Citation
Nie, Chao, "Characterization of Magnesium Silicide Processed with Thermal Spray for Thermoelectric Energy Harvesting" (2013). Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions). 2371.
https://commons.library.stonybrook.edu/stony-brook-theses-and-dissertations-collection/2371