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Influence of POSS nano-particles on Sn–3.0Ag–0.5Cu–xPOSS/Cu composite solder joints during isothermal aging

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Abstract

Polyhedral oligomeric silsesquioxanes (POSS) nano-particles reinforced Sn–3.0Ag–0.5Cu–xPOSS (x = 1, 3, 5) composite solders were prepared and were reflowed on Cu substrates at 543 K. Then, the solder joints were isothermal aged at 393 K for 24 and 48 h, respectively. Microstructural evolution of the solder joints were observed by scanning electron microscopy and the influence of POSS nano-particles on the solder joint were investigated. The results showed that β-Sn primary phase was refined and the number of grain boundary increased with the addition of POSS nano-particles. The growth rates of intermetallic compounds (IMCs) layer were suppressed by the adsorption affection of POSS nano-particles to the IMCs layer during isothermal aging. Moreover, the dissolution process of the IMCs layer, which was accompanied by with the growth of the IMCs layer, changed the morphology of the IMCs layer. The growth rate and the dissolution rate of the IMCs layer in Sn–3.0Ag–0.5Cu–3POSS/Cu composite solder joint were the lowest.

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Acknowledgments

This project was financially supported by a Natural Science Foundation of China (Grant No. 51375511) and Fundamental Research Funds for the Central Universities of China (Grant No. CDJZR12138801, CDJZR11135501 and CDJZR13130033).

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Authors and Affiliations

  1. Department of Material Science and Engineering, Chongqing University, Chongqing, 400044, China

    Jun Shen, Qin Tang, Yayun Pu, Dajun Zhai, Zhongming Cao & Jie Chen

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  1. Jun Shen
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  2. Qin Tang
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  3. Yayun Pu
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  4. Dajun Zhai
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  5. Zhongming Cao
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Correspondence to Jun Shen.

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Shen, J., Tang, Q., Pu, Y. et al. Influence of POSS nano-particles on Sn–3.0Ag–0.5Cu–xPOSS/Cu composite solder joints during isothermal aging. J Mater Sci: Mater Electron 24, 4881–4887 (2013). https://doi.org/10.1007/s10854-013-1492-8

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  • DOI: https://doi.org/10.1007/s10854-013-1492-8

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