caa a22 4500 445828242 CHVBK 20180317145305.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s10854-010-0267-8 doi (NATIONALLICENCE)springer-10.1007/s10854-010-0267-8 Properties and microstructure of Sn-0.7Cu-0.05Ni solder bearing rare earth element Pr [Elektronische Daten] [Guang Zeng, Songbai Xue, Liang Zhang, Lili Gao, Zhongmin Lai, Jiadong Luo] Effects of trace amount of rare earth element Pr on properties and microstructure of Sn-0.7Cu-0.05Ni solder were investigated in this paper. The solderability of Sn-Cu-Ni-xPr alloy and shear strengh of Sn-Cu-Ni-xPr soldered micro-joints were determined by means of the wetting balance method and shear test, respectively. Moreover, microstructure of solder alloys bearing Pr, as well as intermetallic compound (IMC) layer formed at solder/Cu interface after soldering were observed. It was concluded that the major benefits of rare earth element Pr on Sn-Cu-Ni lead-free solder are: improving solderability, refining microstructure, and depressing IMC (IMC) growth, which exhibited improved mechanical properties. It also revealed that (Cu,Ni)6Sn5 is the majority IMC phase at the interface of Sn-Cu-Ni-xPr/Cu solder joints. Ni added into the solder effectively suppressed the growth of Cu3Sn and consequently also the total IMC layer thickness. Above all, the thickness and morphology of the interfacial (Cu,Ni)6Sn5 IMC were optimized due to alloying Pr. It can be inferred that Pr and Ni would play an important role in improving the reliability of Sn-Cu-Ni lead-free solder joints. Springer Science+Business Media, LLC, 2010 Zeng Guang College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, 210016, Nanjing, People's Republic of China aut Xue Songbai College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, 210016, Nanjing, People's Republic of China aut Zhang Liang College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, 210016, Nanjing, People's Republic of China aut Gao Lili College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, 210016, Nanjing, People's Republic of China aut Lai Zhongmin Provincial Key Lab of Advanced Welding Technology, Jiangsu University of Science and Technology, 212003, Zhengjiang, People's Republic of China aut Luo Jiadong College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, 210016, Nanjing, People's Republic of China aut Journal of Materials Science: Materials in Electronics Springer US; http://www.springer-ny.com 22/8(2011-08-01), 1101-1108 0957-4522 22:8<1101 2011 22 10854 https://doi.org/10.1007/s10854-010-0267-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10854-010-0267-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zeng Guang College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, 210016, Nanjing, People's Republic of China aut NATIONALLICENCE 700 1- Xue Songbai College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, 210016, Nanjing, People's Republic of China aut NATIONALLICENCE 700 1- Zhang Liang College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, 210016, Nanjing, People's Republic of China aut NATIONALLICENCE 700 1- Gao Lili College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, 210016, Nanjing, People's Republic of China aut NATIONALLICENCE 700 1- Lai Zhongmin Provincial Key Lab of Advanced Welding Technology, Jiangsu University of Science and Technology, 212003, Zhengjiang, People's Republic of China aut NATIONALLICENCE 700 1- Luo Jiadong College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, 210016, Nanjing, People's Republic of China aut NATIONALLICENCE 773 0- Journal of Materials Science: Materials in Electronics Springer US; http://www.springer-ny.com 22/8(2011-08-01), 1101-1108 0957-4522 22:8<1101 2011 22 10854 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer