Fabrication and thermoelectric properties of Al/Mg2Si composite materials

Yuta Hayashibara; Kei Hayashi; Ikumi Ando; Masataka Kubouchi; Yohei Ogawa; Wataru Saito; Yuzuru Miyazaki

doi:10.2320/matertrans.E-M2018815

Fabrication and thermoelectric properties of Al/Mg₂Si composite materials

Yuta Hayashibara, Kei Hayashi, Ikumi Ando, Masataka Kubouchi, Yohei Ogawa, Wataru Saito, Yuzuru Miyazaki

ENG - Applied Physics

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

7 Citations (Scopus)

Abstract

Mg₂Si has attracted interest as a potential thermoelectric material that can convert waste heat into electricity. To improve thermoelectric performance of Mg₂Si, Al/Mg₂Si composite materials with nominal composition of xAl/Mg₂Si (x = 0.25, 0.5, 0.75, 1.0, or 1.5) were fabricated, i.e., an Al metal phase was introduced to an Mg₂Si matrix. Reflecting an increase in the electrical conductivity and a decrease in the Seebeck coefficient with increasing x, the power factor was successfully enhanced by the incorporation of the Al phase. The increase in electrical conductivity was discussed in terms of electron carrier density and carrier mobility.

Original language	English
Pages (from-to)	1041-1045
Number of pages	5
Journal	Materials Transactions
Volume	59
Issue number	7
DOIs	https://doi.org/10.2320/matertrans.E-M2018815
Publication status	Published - 2018

Keywords

Aluminum
Carrier mobility
Composite material
Electron carrier density
Magnesium silicide
Microstructure
Thermoelectric properties

ASJC Scopus subject areas

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

Access to Document

10.2320/matertrans.E-M2018815

Cite this

@article{3e36efaf2f554ec2a1a421f52b3d2135,

title = "Fabrication and thermoelectric properties of Al/Mg2Si composite materials",

abstract = "Mg2Si has attracted interest as a potential thermoelectric material that can convert waste heat into electricity. To improve thermoelectric performance of Mg2Si, Al/Mg2Si composite materials with nominal composition of xAl/Mg2Si (x = 0.25, 0.5, 0.75, 1.0, or 1.5) were fabricated, i.e., an Al metal phase was introduced to an Mg2Si matrix. Reflecting an increase in the electrical conductivity and a decrease in the Seebeck coefficient with increasing x, the power factor was successfully enhanced by the incorporation of the Al phase. The increase in electrical conductivity was discussed in terms of electron carrier density and carrier mobility.",

keywords = "Aluminum, Carrier mobility, Composite material, Electron carrier density, Magnesium silicide, Microstructure, Thermoelectric properties",

author = "Yuta Hayashibara and Kei Hayashi and Ikumi Ando and Masataka Kubouchi and Yohei Ogawa and Wataru Saito and Yuzuru Miyazaki",

note = "Funding Information: This study was partly supported by a JSPS Grant-in-Aid for Scientific Research (B) (No. 17H03398). Publisher Copyright: {\textcopyright} 2018 The Thermoelectrics Society of Japan.",

year = "2018",

doi = "10.2320/matertrans.E-M2018815",

language = "English",

volume = "59",

pages = "1041--1045",

journal = "Materials Transactions",

issn = "1345-9678",

publisher = "Japan Institute of Metals (JIM)",

number = "7",

}

TY - JOUR

T1 - Fabrication and thermoelectric properties of Al/Mg2Si composite materials

AU - Hayashibara, Yuta

AU - Hayashi, Kei

AU - Ando, Ikumi

AU - Kubouchi, Masataka

AU - Ogawa, Yohei

AU - Saito, Wataru

AU - Miyazaki, Yuzuru

PY - 2018

Y1 - 2018

N2 - Mg2Si has attracted interest as a potential thermoelectric material that can convert waste heat into electricity. To improve thermoelectric performance of Mg2Si, Al/Mg2Si composite materials with nominal composition of xAl/Mg2Si (x = 0.25, 0.5, 0.75, 1.0, or 1.5) were fabricated, i.e., an Al metal phase was introduced to an Mg2Si matrix. Reflecting an increase in the electrical conductivity and a decrease in the Seebeck coefficient with increasing x, the power factor was successfully enhanced by the incorporation of the Al phase. The increase in electrical conductivity was discussed in terms of electron carrier density and carrier mobility.

AB - Mg2Si has attracted interest as a potential thermoelectric material that can convert waste heat into electricity. To improve thermoelectric performance of Mg2Si, Al/Mg2Si composite materials with nominal composition of xAl/Mg2Si (x = 0.25, 0.5, 0.75, 1.0, or 1.5) were fabricated, i.e., an Al metal phase was introduced to an Mg2Si matrix. Reflecting an increase in the electrical conductivity and a decrease in the Seebeck coefficient with increasing x, the power factor was successfully enhanced by the incorporation of the Al phase. The increase in electrical conductivity was discussed in terms of electron carrier density and carrier mobility.

KW - Aluminum

KW - Carrier mobility

KW - Composite material

KW - Electron carrier density

KW - Magnesium silicide

KW - Microstructure

KW - Thermoelectric properties

UR - http://www.scopus.com/inward/record.url?scp=85049167955&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85049167955&partnerID=8YFLogxK

U2 - 10.2320/matertrans.E-M2018815

DO - 10.2320/matertrans.E-M2018815

M3 - Article

AN - SCOPUS:85049167955

SN - 1345-9678

VL - 59

SP - 1041

EP - 1045

JO - Materials Transactions

JF - Materials Transactions

IS - 7

ER -