Activity measurement of the constituents in molten Sn-Ag-In and Sn-Zn-Mg ternary lead free solder alloys by mass spectrometry

Takahiro Miki, Naotaka Ogawa, Tetsuya Nagasaka, Mitsutaka Hino

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

Soldering material widely used is Sn-Pb alloy, which have low melting point and excellent electrical, strength properties and wettability. However, Pb is one of the toxic elements, which is undesirable due to environmental and safety reasons, thus Pb-free alternative alloy is preferred for new soldering material. Sn-Ag and Sn-Zn based alloys have been viewed as very promising candidates, among many potential substitutes. Addition of third element to these alloys will decrease melting point of the alloys. Hence, Sn-Ag-In and Sn-Zn-Mg alloys are expected to be suitable for replacing Sn-Pb solder alloy. In order to design new Pb-free soldering materials, it is crucial to understand precise thermodynamic properties and phase diagrams of alloy systems. In the present work, ion current ratios of Ag to In and Mg to Zn were measured for Sn-Ag-In and Sn-Zn-Mg alloys by mass spectrometry, respectively. Also, the authors reviewed the thermodynamic properties of terminal binary alloys determined by other researchers and evaluated a thermodynamic functions to express the excess Gibbs free energy of each binary alloy. Thermodynamic functions to express the excess Gibbs free energy of liquid Sn-Ag-In and Sn-Zn-Mg ternary alloys were determined, utilizing the assessed Gibbs free energy of terminal binary alloys with the measured ion current ratios using mass spectrometer.

本文言語English
ホスト出版物のタイトルYazawa International Symposium
ホスト出版物のサブタイトルMetallurgical and Materials Processing: Principles and Techologies; Materials Processing Fundamentals and New Technologies
編集者F. Kongoli, K. Itagaki, C. Yamauchi, H.Y. Sohn, F. Kongoli, K. Itagaki, C. Yamauchi, H.Y. Sohn
ページ405-415
ページ数11
出版ステータスPublished - 2003 10 16
イベントYazawa International Symposium: Metallurgical and Materials Processing: Principles and Technologies; Materials Processing Fundamentals and New Technologies - San Diego, CA, United States
継続期間: 2003 3 22003 3 6

出版物シリーズ

名前Yazawa International Symposium: Metallurgical and Materials Processing: Principles and Techologies; Materials Processing Fundamentals and New Technologies
1

Other

OtherYazawa International Symposium: Metallurgical and Materials Processing: Principles and Technologies; Materials Processing Fundamentals and New Technologies
国/地域United States
CitySan Diego, CA
Period03/3/203/3/6

ASJC Scopus subject areas

  • 工学(全般)

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