Fabrication of Zn4Sb3 Bulk Thermoelectric Materials Reinforced with SiC Nanosized Particles by Hot Extrusion Process

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dc.contributor.author Akao, Takahiro
dc.contributor.author Uya, Kenji
dc.contributor.author Onda, Tetsuhiko
dc.contributor.author Chen, Zhong-Chun
dc.date.accessioned 2017-04-12T10:39:24Z
dc.date.available 2017-04-12T10:39:24Z
dc.date.issued 2017-04-12
dc.identifier.issn 2079-6226
dc.identifier.uri http://journals.jkuat.ac.ke/index.php/sri
dc.identifier.uri http://hdl.handle.net/123456789/2856
dc.description.abstract Zinc antimonide, Zn4Sb3, has been found as a promising thermoelectric material utilized in a temperature range of 200 ~ 500˚C, in which there exist vast waste-heat resources exhausted from many factories and vehicles. However, the compound intrinsically shows an extremely brittle feature being an impediment for practical applications. Thus, enhancement of the mechanical properties is highly crucial to prevent unexpected fractures during manufacturing and service processes of modules. We have focused on incorporating nanosized SiC particles into Zn4Sb3 matrix. The bulk samples were prepared by mechanochemical mixing of the starting powders and subsequent hot-extrusion process. The extrudates containing SiC particles up to 5vol% exhibited sound appearances, high density, and fine-grained microstructures with single phase of Zn4Sb3. The mechanical properties such as hardness and compressive strength are remarkably improved by the addition of SiC particles, as a result of dispersion strengthening of SiC particles and microstructural refinement induced by a pinning effect of the particles. Meanwhile, the thermoelectric properties are retained comparable to the pristine compound, in contrast to a conventional behavior where the reinforcements in a semiconductor should usually role-play as an impurity. en_US
dc.language.iso en en_US
dc.relation.ispartofseries Sustainable Research and Innovation Conference Proceedings;Vol 4 (2012)
dc.subject Zn4Sb3 en_US
dc.subject SiC Nanosized Particles en_US
dc.subject Hot Extrusion en_US
dc.subject Zinc antimonide en_US
dc.subject JKUAT en_US
dc.subject Kenya en_US
dc.title Fabrication of Zn4Sb3 Bulk Thermoelectric Materials Reinforced with SiC Nanosized Particles by Hot Extrusion Process en_US
dc.type Article en_US

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