Solid-state synthesis of Mg2X (X=Si, Ge, Sn and Pb) via bulk mechanical alloying

Tatsuhiko Aizawa, Renbo Song

研究成果: Conference contribution

5 被引用数 (Scopus)

抄録

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.

本文言語English
ホスト出版物のタイトルProgress in Powder Metallurgy - Proceedings of the 2006 Powder Metallurgy World Congress and Exhibition (PM 2006)
出版社Trans Tech Publications Ltd
ページ221-224
ページ数4
PART 1
ISBN(印刷版)0878494197, 9780878494194
DOI
出版ステータスPublished - 2007
外部発表はい
イベント2006 Powder Metallurgy World Congress and Exhibition, PM 2006 - Busan, Korea, Republic of
継続期間: 2006 9 242006 9 28

出版物シリーズ

名前Materials Science Forum
番号PART 1
534-536
ISSN(印刷版)0255-5476
ISSN(電子版)1662-9752

Conference

Conference2006 Powder Metallurgy World Congress and Exhibition, PM 2006
国/地域Korea, Republic of
CityBusan
Period06/9/2406/9/28

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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