Abstract
Magnesium base alloys and compounds are attractive for various applications as a functional material. In particular, a series of binary system by Mg 2X (X = Si, Ge, Sn and Pb) has fascinated many researchers and engineers by its thermoelectric properties and semi-conductive performance. Many barriers in its processing rejects precise investigation of these types of semi-conductive compounds: high vaporizing pressure and mechanical adhesion of magnesium, reaction of germanium and tin with crucibles, and, difference of melting point among elements, X. Solid-state processing via the bulk mechanical alloying enables us to directly fabricate these Mg2X semi-conductive materials in high density performs. The precise control of chemical composition leads to an investigation on the dilution and enrichment of X in Mg 2X. Two types of solid-state reactivity are introduced: e.g. synthesis of Mg2Si from an elemental mixture Mg - Si, which is a nucleation-controlled process, while synthesis OfMg2Sn from Mg - Sn is a diffusion-controlled process. The thermoelectricity of these Mg 2X is evaluated for discussion on the validity and effectiveness of this new PM route as a reliable tool for fabrication of thermoelectric compounds.
| Original language | English |
|---|---|
| Title of host publication | Materials Science Forum |
| Pages | 221-224 |
| Number of pages | 4 |
| Volume | 534-536 |
| Edition | PART 1 |
| Publication status | Published - 2007 |
| Externally published | Yes |
| Event | 2006 Powder Metallurgy World Congress and Exhibition, PM 2006 - Busan Duration: 2006 Sep 24 → 2006 Sep 28 |
Publication series
| Name | Materials Science Forum |
|---|---|
| Number | PART 1 |
| Volume | 534-536 |
| ISSN (Print) | 02555476 |
Other
| Other | 2006 Powder Metallurgy World Congress and Exhibition, PM 2006 |
|---|---|
| City | Busan |
| Period | 06/9/24 → 06/9/28 |
Fingerprint
Keywords
- Bulk mechanical alloying
- Intermetallic compounds
- MgX
- Semi-conductivity
- Solid state synthesis
- Thermoelectricity
ASJC Scopus subject areas
- Materials Science(all)
Cite this
Solid-state synthesis of Mg2X (X=Si, Ge, Sn and Pb) via bulk mechanical alloying. / Aizawa, Tatsuhiko; Song, Renbo.
Materials Science Forum. Vol. 534-536 PART 1. ed. 2007. p. 221-224 (Materials Science Forum; Vol. 534-536, No. PART 1).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Solid-state synthesis of Mg2X (X=Si, Ge, Sn and Pb) via bulk mechanical alloying
AU - Aizawa, Tatsuhiko
AU - Song, Renbo
PY - 2007
Y1 - 2007
N2 - Magnesium base alloys and compounds are attractive for various applications as a functional material. In particular, a series of binary system by Mg 2X (X = Si, Ge, Sn and Pb) has fascinated many researchers and engineers by its thermoelectric properties and semi-conductive performance. Many barriers in its processing rejects precise investigation of these types of semi-conductive compounds: high vaporizing pressure and mechanical adhesion of magnesium, reaction of germanium and tin with crucibles, and, difference of melting point among elements, X. Solid-state processing via the bulk mechanical alloying enables us to directly fabricate these Mg2X semi-conductive materials in high density performs. The precise control of chemical composition leads to an investigation on the dilution and enrichment of X in Mg 2X. Two types of solid-state reactivity are introduced: e.g. synthesis of Mg2Si from an elemental mixture Mg - Si, which is a nucleation-controlled process, while synthesis OfMg2Sn from Mg - Sn is a diffusion-controlled process. The thermoelectricity of these Mg 2X is evaluated for discussion on the validity and effectiveness of this new PM route as a reliable tool for fabrication of thermoelectric compounds.
AB - Magnesium base alloys and compounds are attractive for various applications as a functional material. In particular, a series of binary system by Mg 2X (X = Si, Ge, Sn and Pb) has fascinated many researchers and engineers by its thermoelectric properties and semi-conductive performance. Many barriers in its processing rejects precise investigation of these types of semi-conductive compounds: high vaporizing pressure and mechanical adhesion of magnesium, reaction of germanium and tin with crucibles, and, difference of melting point among elements, X. Solid-state processing via the bulk mechanical alloying enables us to directly fabricate these Mg2X semi-conductive materials in high density performs. The precise control of chemical composition leads to an investigation on the dilution and enrichment of X in Mg 2X. Two types of solid-state reactivity are introduced: e.g. synthesis of Mg2Si from an elemental mixture Mg - Si, which is a nucleation-controlled process, while synthesis OfMg2Sn from Mg - Sn is a diffusion-controlled process. The thermoelectricity of these Mg 2X is evaluated for discussion on the validity and effectiveness of this new PM route as a reliable tool for fabrication of thermoelectric compounds.
KW - Bulk mechanical alloying
KW - Intermetallic compounds
KW - MgX
KW - Semi-conductivity
KW - Solid state synthesis
KW - Thermoelectricity
UR - http://www.scopus.com/inward/record.url?scp=38349113992&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=38349113992&partnerID=8YFLogxK
M3 - Conference contribution
SN - 0878494197
SN - 9780878494194
VL - 534-536
T3 - Materials Science Forum
SP - 221
EP - 224
BT - Materials Science Forum
ER -