Effects of aging time on the mechanical properties of Sn-9Zn-1.5Ag-xBi lead-free solder alloys

被引:25
作者
Liu, Chih-Yao [1 ]
Hon, Min-Hsiung [1 ,2 ]
Wang, Moo-Chin [3 ]
Chen, Ying-Ru [4 ]
Chang, Kuo-Ming [4 ]
Li, Wang-Long [4 ]
机构
[1] Natl Cheng Kung Univ, Dept Mat Sci & Engn, Tainan 70101, Taiwan
[2] Natl Kaohsiung Univ Appl Sci, Dept Mech Engn, Kaohsiung 80782, Taiwan
[3] Kaohsiung Med Univ, Dept Fragrance & Cosmet Sci, Kaohsiung 80728, Taiwan
[4] Natl Cheng Kung Univ, Inst Nanotechnol & Microsyst Engn, Tainan 70101, Taiwan
关键词
Aging time; Microstructure; Lattice parameter; Grain size; Yield strength; PB-FREE SOLDER; ZN-BI SOLDERS; CU-SUBSTRATE; INTERMETALLIC COMPOUNDS; JOINT STRENGTH; MICROSTRUCTURE; NANOPARTICLES; INTERFACE; BEHAVIOR; GROWTH;
D O I
10.1016/j.jallcom.2013.08.022
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The effects of aging time on the mechanical properties of the Sn-9Zn-1.5Ag-xBi lead-free solder alloys are investigated using scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area electron diffraction (SAED), energy dispersive spectrometry (EDS) and a universal testing machine. The experimental results show that the microstructure of Sn-9Zn-1.5Ag-xBi solder alloys is composed of Sn-rich phase and AgZn3. No other intermetallic compounds (IMCs) with Bi content was observed in the solder matrix for Sn-9Zn-1.5Ag solder alloys with various Bi contents before and after aging at 150 degrees C for different durations. The lattice parameter increases significantly with increasing aging time or Bi addition. The size of Sn-rich grain increased gradually with aging time increased, but decreases with Bi content increases. The maximum yield strength is 112.7 +/- 2.2 MPa for Sn-9Zn-1.5Ag-3Bi solder alloy before aging. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码:229 / 235
页数:7
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