Microstructure and Mechanical Properties of as-soldered SnBi-SACBN Composite Solder Paste
Aiming at the brittleness of Sn58Bi ( SnBi) solder joints，the SnBi composite pastes were prepared by mechanical mixing method with SAC-Bi-Ni ( SACBN) alloy powder. The concentration of the additives was 0， 0. 5，1，and 5 wt%，respectively. The microstructure and composition of the as-soldered alloys...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Harbin University of Science and Technology Publications
2018-02-01
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| Series: | Journal of Harbin University of Science and Technology |
| Subjects: | |
| Online Access: | https://hlgxb.hrbust.edu.cn/#/digest?ArticleID=1480 |
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| Summary: | Aiming at the brittleness of Sn58Bi ( SnBi) solder joints，the SnBi composite pastes were prepared
by mechanical mixing method with SAC-Bi-Ni ( SACBN) alloy powder. The concentration of the additives was 0，
0. 5，1，and 5 wt%，respectively. The microstructure and composition of the as-soldered alloys were investigated
by SEM. Meanwhile，the mechanical properties of the alloys were characterized by nanoindentation method.
Experimental results indicate that with the increase of the SACBN content in the composite solder pastes，the
concentration of β-Sn phase increased. In contrast，Bi-rich phase was reduced after reflow. The refined reticular
structure of Bi-rich phase was suppressed in the alloys. As the increase of SACBN particles increased from 0 to 5
wt%，the hardness of the alloy decreased from 219. 05 N/mm2 to 174. 18 N/mm2. Meanwhile，the elastic modulus
decreased from 5. 93 N/mm2 to 2. 86 N/mm2. |
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| ISSN: | 1007-2683 |