TY - JOUR
T1 - Phase transformation of Sn-Pb-Bi solder for photovoltaic ribbon
T2 - A real-time synchrotron X-ray scattering study
AU - Cho, Tae Sik
PY - 2014/6
Y1 - 2014/6
N2 - The phase transformation of Sn-Pb-Bi solder for photovoltaic ribbon during soldering was studied using real-time synchrotron x-ray scattering. At room temperature, Sn and Pb crystal phases in the solder existed separately. By heating to 92°C, a new PbBi alloy crystal phase was formed, which grew further up to 160°C. The Sn crystal phase first started to melt at 160°C, and was mostly melted at 165°C. In contrast, the Pb and PbBi crystal phases started to melt at 165°C, and were mostly melted at 170°C. The useful result was obtained, that the solder's melting temperature decreased from 183°C to 170°C by addition of a small amount of Bi atoms to the eutectic Sn62-Pb38 (wt%) solder. Our study first revealed the detailed in-situ phase transformation of Sn-Pb-Bi solder during heating to the eutectic temperature. Considering the results of peel strength and hardness, adding 1 wt% of Bi atoms to the Sn62-Pb38 (wt%) solder produced an appropriate composition.
AB - The phase transformation of Sn-Pb-Bi solder for photovoltaic ribbon during soldering was studied using real-time synchrotron x-ray scattering. At room temperature, Sn and Pb crystal phases in the solder existed separately. By heating to 92°C, a new PbBi alloy crystal phase was formed, which grew further up to 160°C. The Sn crystal phase first started to melt at 160°C, and was mostly melted at 165°C. In contrast, the Pb and PbBi crystal phases started to melt at 165°C, and were mostly melted at 170°C. The useful result was obtained, that the solder's melting temperature decreased from 183°C to 170°C by addition of a small amount of Bi atoms to the eutectic Sn62-Pb38 (wt%) solder. Our study first revealed the detailed in-situ phase transformation of Sn-Pb-Bi solder during heating to the eutectic temperature. Considering the results of peel strength and hardness, adding 1 wt% of Bi atoms to the Sn62-Pb38 (wt%) solder produced an appropriate composition.
KW - Phase transformation
KW - Photovoltaic ribbon
KW - Sn-Pb-Bi solder
KW - Synchrotron x-ray scattering
UR - http://www.scopus.com/inward/record.url?scp=84902841975&partnerID=8YFLogxK
U2 - 10.4313/TEEM.2014.15.3.155
DO - 10.4313/TEEM.2014.15.3.155
M3 - Article
AN - SCOPUS:84902841975
SN - 1229-7607
VL - 15
SP - 155
EP - 158
JO - Transactions on Electrical and Electronic Materials
JF - Transactions on Electrical and Electronic Materials
IS - 3
ER -
