Improved trade-off between thermoelectric performance and mechanical reliability of Mg2Si by hybridization of few-layered reduced graphene oxides

Gwansik Kim; Sung Wng Kim; Hyun Jun Rim; Hwijong Lee; Jeongmin Kim; Jong Wook Roh; Byung Wook Kim; Kyu Hyoung Lee; Wooyoung Lee

doi:10.1016/j.scriptamat.2018.11.052

Improved trade-off between thermoelectric performance and mechanical reliability of Mg₂Si by hybridization of few-layered reduced graphene oxides

Gwansik Kim, Sung Wng Kim, Hyun Jun Rim, Hwijong Lee, Jeongmin Kim, Jong Wook Roh, Byung Wook Kim, Kyu Hyoung Lee, Wooyoung Lee

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

Nanocomposites can simultaneously enhance the thermoelectric and mechanical properties of thermoelectric materials. Here, we fabricated bulks of Mg_1.96Al_0.04Si_0.97Bi_0.03 with monodispersed few-layered reduced graphene oxides utilizing ultrasonic-based wet chemical pulverizing-mixing and spark plasma sintering to improve unfavorable trade-off between thermoelectric performance and mechanical reliability, which is important for commercialization. An unexpected high fracture toughness of ~1.88 MPa m^1/2 was observed due to the synergetic effect of the deflection of crack propagation, bridging, and sheet pull-out mechanisms, and a high thermoelectric figure of merit ~0.6 was obtained even for a high content (3 vol.%) of reduced graphene oxides.

Original language	English
Pages (from-to)	402-407
Number of pages	6
Journal	Scripta Materialia
Volume	162
DOIs	https://doi.org/10.1016/j.scriptamat.2018.11.052
Publication status	Published - 2019 Mar 15

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant ( 2017R1A2A1A17069528 ) funded by the Korea government (MSIT), the Industrial Fundamental Technology Development Program (10052977) funded by the Ministry of Trade, Industry and Energy (MOTIE), and Hyundai Motor Group ( 2017-11-0993 ).

Publisher Copyright:
© 2018 Elsevier Ltd

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

Access to Document

10.1016/j.scriptamat.2018.11.052

Cite this

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title = "Improved trade-off between thermoelectric performance and mechanical reliability of Mg2Si by hybridization of few-layered reduced graphene oxides",

abstract = "Nanocomposites can simultaneously enhance the thermoelectric and mechanical properties of thermoelectric materials. Here, we fabricated bulks of Mg1.96Al0.04Si0.97Bi0.03 with monodispersed few-layered reduced graphene oxides utilizing ultrasonic-based wet chemical pulverizing-mixing and spark plasma sintering to improve unfavorable trade-off between thermoelectric performance and mechanical reliability, which is important for commercialization. An unexpected high fracture toughness of ~1.88 MPa m1/2 was observed due to the synergetic effect of the deflection of crack propagation, bridging, and sheet pull-out mechanisms, and a high thermoelectric figure of merit ~0.6 was obtained even for a high content (3 vol.%) of reduced graphene oxides.",

author = "Gwansik Kim and Kim, {Sung Wng} and Rim, {Hyun Jun} and Hwijong Lee and Jeongmin Kim and Roh, {Jong Wook} and Kim, {Byung Wook} and Lee, {Kyu Hyoung} and Wooyoung Lee",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant ( 2017R1A2A1A17069528 ) funded by the Korea government (MSIT), the Industrial Fundamental Technology Development Program (10052977) funded by the Ministry of Trade, Industry and Energy (MOTIE), and Hyundai Motor Group ( 2017-11-0993 ). Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2019",

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doi = "10.1016/j.scriptamat.2018.11.052",

language = "English",

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AU - Kim, Gwansik

AU - Kim, Sung Wng

AU - Rim, Hyun Jun

AU - Lee, Hwijong

AU - Kim, Jeongmin

AU - Roh, Jong Wook

AU - Kim, Byung Wook

AU - Lee, Kyu Hyoung

AU - Lee, Wooyoung

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant ( 2017R1A2A1A17069528 ) funded by the Korea government (MSIT), the Industrial Fundamental Technology Development Program (10052977) funded by the Ministry of Trade, Industry and Energy (MOTIE), and Hyundai Motor Group ( 2017-11-0993 ). Publisher Copyright: © 2018 Elsevier Ltd

PY - 2019/3/15

Y1 - 2019/3/15

N2 - Nanocomposites can simultaneously enhance the thermoelectric and mechanical properties of thermoelectric materials. Here, we fabricated bulks of Mg1.96Al0.04Si0.97Bi0.03 with monodispersed few-layered reduced graphene oxides utilizing ultrasonic-based wet chemical pulverizing-mixing and spark plasma sintering to improve unfavorable trade-off between thermoelectric performance and mechanical reliability, which is important for commercialization. An unexpected high fracture toughness of ~1.88 MPa m1/2 was observed due to the synergetic effect of the deflection of crack propagation, bridging, and sheet pull-out mechanisms, and a high thermoelectric figure of merit ~0.6 was obtained even for a high content (3 vol.%) of reduced graphene oxides.

AB - Nanocomposites can simultaneously enhance the thermoelectric and mechanical properties of thermoelectric materials. Here, we fabricated bulks of Mg1.96Al0.04Si0.97Bi0.03 with monodispersed few-layered reduced graphene oxides utilizing ultrasonic-based wet chemical pulverizing-mixing and spark plasma sintering to improve unfavorable trade-off between thermoelectric performance and mechanical reliability, which is important for commercialization. An unexpected high fracture toughness of ~1.88 MPa m1/2 was observed due to the synergetic effect of the deflection of crack propagation, bridging, and sheet pull-out mechanisms, and a high thermoelectric figure of merit ~0.6 was obtained even for a high content (3 vol.%) of reduced graphene oxides.

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