Effects Of Nickel On The Microstructure And The Mechanical Properties Of Sn-0.7Cu Lead-Free Solders

Archives of Metallurgy and Materials

A. Simon¹  Z. Gácsi²  A. Gyenes²  P. Lanszki² 

[1] INSTITUTE OF CERAMICS AND POLYMER ENGINEERING, UNIVERSITY OF MISKOLC, H-3515 MISKOLC-EGYETEMVÁROS, HUNGARY;INSTITUTE OF PHYSICAL METALLURGY, METAL FORMING AND NANOTECHNOLOGY, UNIVERSITY OF MISKOLC, H-3515 MISKOLC-EGYETEMVÁROS, HUNGARY

关键词: Keywords: Sn-0.7Cu;    lead-free solder;    Ni addition;    microstructure;    mechanical properties;   

DOI  :  10.1515/amm-2015-0151

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

This paper investigates the effects of small amount nickel addition (0, 200, 400, 800, 1800 ppm) on the microstructure and the mechanical properties of Sn-0.7Cu lead-free solder alloys. It is known that even ppm level Ni additions have significant effects on the microstructure of Sn-Cu solder alloys. Ni suppresses the growth of β-Sn dendrites in favour of eutectic formation. As the nickel content increases, the microstructure undergoes a morphological evolution from hypoeutectic through fully eutectic to hypereutectic. Along with these transformations, the mechanical properties of the alloy also significantly change. Based on the experimental results presented in this paper, the Sn-0.7Cu solder achieves maximum strength at the addition level of 800 ppm Ni, when the microstructure becomes fully eutectic.

【 授权许可】

Unknown