Microstructure of a lead-free composite solder produced by an in-situ process

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A composite solder, which consisted of solder matrix and intermetallic reinforcements, was manufactured by an innovative method. The cast ingot of the Sn-6.9Cu-2.9Ag alloy has primary Cu6Sn5 intermetallics in dendritic form. After rolling, the intermetallic dendrites are crushed into fine particles and distributed uniformly in the solder matrix. The crushed intermetallic particles do not melt, and they retain their shape during spheroidizing and reflow because of their high melting temperature. Coarsening and gravitational segregation of the particles was observed during reflow and analyzed theoretically.
Publisher
Springer
Issue Date
2002
Language
English
Article Type
Article; Proceedings Paper
Keywords

SN-AG; ALLOY

Citation

JOURNAL OF ELECTRONIC MATERIALS, v.31, no.11, pp.1304

ISSN
0361-5235
URI
http://hdl.handle.net/10203/81282
Appears in Collection
MS-Journal Papers(저널논문)
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