Abstract
Pb-base high-temperature solders (mass % Sn=5-10, melting point (m.p.)=300-310°C) are widely applied under severe conditions, although the harmful nature of Pb is recognized. Bi-base alloys (m.p. of Bi=270°C), Zn-base alloys (m.p. of Zn=420°C), and several Au-base eutectic alloys (m.p. of Au-20Sn and Au-3.6Si=280 and 363°C, respectively) are proposed as candidates for Pb-free hightemperature solders. This paper reviews the features of Bi-base composite solders containing reinforcement particles of a superelastic Cu-Al-Mn alloy in a Bi matrix to relax thermal stress and to prevent the propagation of cracks, and Zn-Al base solders, which have high stability and high reliability enough to be utilized in practical applications under severe thermal cycle tests between-40 and 230°C more than 2000 cycles.
Original language | English |
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Journal | Journal of ASTM International |
Volume | 8 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2011 Jan 1 |
Keywords
- High-temperature solder
- Intermetallic compound IMC
- Thermal cycle test
ASJC Scopus subject areas
- Environmental Engineering
- Materials Science(all)
- Nuclear Energy and Engineering
- Engineering(all)
- Public Health, Environmental and Occupational Health