Phase Equilibria of the Fe-Ni-Sn Ternary System at 270°C
Phase Equilibria of the Fe-Ni-Sn Ternary System at 270°C
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DOI：
10.1007/s11664-016-4787-8
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发表时间：
2016-07
影响因子：
2.1
通讯作者：
Tzu-Ting Huang;Shih-Wei Lin;Chih-Ming Chen;P. Chen;Y. Yen
中科院分区：
文献类型：
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作者：
Tzu-Ting Huang;Shih-Wei Lin;Chih-Ming Chen;P. Chen;Y. Yen
Fe-42wt.%Ni合金，也称为42因瓦合金(合金42)，由于其热膨胀系数比铜或镍基板更接近硅基板，因此被用作引线框架材料。为了增强基材与焊料之间的润湿性，通常在42合金表面电镀锡层。为了确保锡和铁镍合金焊点的可靠性，必须清楚地了解Fe-Ni-Sn三元系的相平衡。为了测定Fe-Ni-Sn三元系在270℃时的等温截面，制备了26种不同成分的Fe-Ni-Sn系合金。实验结果证实在270℃时存在Fe3Ni和FeNi相，同时观察到Fe-Ni-Sn三元系的等温区由11个单相区、19个两相区和9个领带三角形组成。此外，在270℃时，Fe-Ni-Sn系中没有发现三元化合物。
The Fe-42 wt.% Ni alloy, also known as a 42 invar alloy (Alloy 42), is used as a lead-frame material because its thermal expansion coefficient is much closer to Si substrate than Cu or Ni substrates. In order to enhance the wettability between the substrate and solder, the Sn layer was commonly electroplated onto the Alloy 42 surface. A clear understanding of the phase equilibria of the Fe-Ni-Sn ternary system is necessary to ensure solder-joint reliability between Sn and Fe-Ni alloys. To determine the isothermal section of the Fe-Ni-Sn ternary system at 270°C, 26 Fe-Ni-Sn alloys with different compositions were prepared. The experimental results confirmed the presence of the Fe3Ni and FeNi phases at 270°C. Meanwhile, it observed that the isothermal section of the Fe-Ni-Sn ternary system was composed of 11 single-phase regions, 19 two-phase regions and nine tie-triangles. Moreover, no ternary compounds were found in the Fe-Ni-Sn system at 270°C.