TY - JOUR
T1 - The effects of Cu alloying on the microstructure and mechanical properties of Zn-25Sn-xCu (x = 0–1.0 wt%) high temperature Pb-free solders
AU - Guo, Wei Ting
AU - Liang, Chien Lung
AU - Lin, Kwang Lung
N1 - Funding Information:
The authors gratefully appreciate the financial support for the present study from the Ministry of Science and Technology, Taiwan under MOST107-2221-E-006-014-MY3 .
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/3/18
Y1 - 2019/3/18
N2 - The effects of Cu alloying on the microstructure and mechanical properties of Zn-25Sn-xCu (x = 0–1.0 wt%) high temperature Pb-free solders were investigated in the present study. The 1 wt% Cu alloying enhanced the ultimate tensile strength and the micro-hardness of the primary η-Zn phase by 23.1% and 144.0% increments, respectively. These mechanical property variations were attributed to the combined effects of grain refining strengthening of the primary η-Zn phases, precipitation strengthening of the fine ε-CuZn 5 compounds in the η-Zn matrix (Cu content greater than 0.3 wt%), and solid-solution strengthening of the Cu inclusion in the η-Zn matrix. The granular two-phase (η-Zn + ε-CuZn 5 ) microstructure, composed of refined η-Zn matrix and fine ε-CuZn 5 precipitations, contributed to superior mechanical strength of the Zn-25Sn-xCu high temperature Pb-free solders.
AB - The effects of Cu alloying on the microstructure and mechanical properties of Zn-25Sn-xCu (x = 0–1.0 wt%) high temperature Pb-free solders were investigated in the present study. The 1 wt% Cu alloying enhanced the ultimate tensile strength and the micro-hardness of the primary η-Zn phase by 23.1% and 144.0% increments, respectively. These mechanical property variations were attributed to the combined effects of grain refining strengthening of the primary η-Zn phases, precipitation strengthening of the fine ε-CuZn 5 compounds in the η-Zn matrix (Cu content greater than 0.3 wt%), and solid-solution strengthening of the Cu inclusion in the η-Zn matrix. The granular two-phase (η-Zn + ε-CuZn 5 ) microstructure, composed of refined η-Zn matrix and fine ε-CuZn 5 precipitations, contributed to superior mechanical strength of the Zn-25Sn-xCu high temperature Pb-free solders.
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U2 - 10.1016/j.msea.2019.02.053
DO - 10.1016/j.msea.2019.02.053
M3 - Article
AN - SCOPUS:85061623667
SN - 0921-5093
VL - 750
SP - 117
EP - 124
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
ER -