Assessment of thermoelectric, mechanical, and microstructural reinforcement properties of graphene-mixed heterostructures
Date
2021
Authors
Zaferani, S.H.
Ghomashchi, R.
Vashaee, D.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Journal article
Citation
ACS Applied Energy Materials, 2021; 4(4):3573-3583
Statement of Responsibility
Sadeq Hooshmand Zaferani, Reza Ghomashchi, and Daryoosh Vashaee
Conference Name
Abstract
We examine the role of graphene nanoplates (GNPs) in the critical properties of thermoelectric GNP nanocomposites. After a detailed analysis of the thermoelectric, microstructural, and mechanical characteristics of such nanocomposites, we present a case study based on CoVSn-GNP heterostructures. It is shown that GNPs can improve the mechanical properties without deteriorating the thermoelectric properties of the material. CoVSn-GNP bulk composites are fabricated using powder metallurgy and spark plasma sintering with a GNP weight percentage range of 0–1. All samples with the addition of GNPs showed improved mechanical properties compared with pristine CoVSn. The sample with 0.5 wt % GNPs showed the highest value of Vickers Hardness (737 HV) among all of the studied compositions. Moreover, the fracture toughness was higher for the samples with a lower average crystal size. The concentration and dispersion of GNPs did not significantly change the CoVSn multiphase microstructure; however, it influenced the thermoelectric factors by reducing the thermal conductivity and increasing the Seebeck coefficient, leading to the enhancement of the thermoelectric figure of merit.
School/Discipline
Dissertation Note
Provenance
Description
Access Status
Rights
© 2021 American Chemical Society