Nano Archive

Effects of nano-structured particles on microstructure and microhardness of Sn-Ag solder alloy

Tai, F and Guo, F and Xia, ZD and Lei, YP and Shi, YW (2010) Effects of nano-structured particles on microstructure and microhardness of Sn-Ag solder alloy. JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS . ISSN 0957-4522

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Abstract

In this research, the typical nano-structured Polyhedral Oligomeric Silsesquioxane (POSS) particles were incorporated into the Sn-3.5Ag eutectic solder paste by mechanically mixing to form lead-free composite solder. The effects of nano-structured POSS additions on the microstructure and mechanical properties of as-fabricated composite solder alloys were systematically investigated. Experimental results indicated that the average size and spacing distance of Ag3Sn intermetallic compounds (IMCs) in composite solder matrix decreased as compared to the Sn-3.5Ag eutectic solder. The 3 wt% addition of nano-structured POSS particles could enhance the microhardness of composite solder by 18.4% compared with the Sn-3.5Ag eutectic solder matrix. The average grain size and spacing distance of Ag3Sn IMCs in Sn-Ag + 3 wt% POSS composite solder matrix reduced from 0.35 to 0.23 mu m and from 0.54 to 0.32 mu m, respectively. The refined Ag3Sn IMCs, acting as a strengthening phase in the solder matrix, could enhance the microhardness of the composite solders.

Item Type:Article
Subjects:Material Science > Nanofabrication processes and tools
ID Code:9757
Deposited By:CSMNT
Deposited On:28 Oct 2010 10:22
Last Modified:28 Oct 2010 10:22

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