We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Effect of structural transition in an amorphous NiP alloy on the wetting by a eutectic Sn-Bi solder.
- Authors
Shen, Ping; Yang, Jun; Wang, Yi; Guo, Ruifen; Jiang, Qichuan
- Abstract
Annealing-induced structural transition from amorphous to nanocrystalline states is believed to have a significant effect on the wettability of metallic glass alloys. In this study, an amorphous NiP alloy was pre-annealed at various temperatures to yield different structures and then wetted by a eutectic Sn-Bi solder at 473 K in a high vacuum using a dispensed sessile drop method. The results show that the structural relaxation and primary crystallization in the amorphous substrates greatly deteriorate the wettability while large-scale eutectic crystallization and the growth of nanocrystallites after high-temperature annealing improve it primarily due to the formation of a precursor film ahead of triple line. Moreover, the amorphous Ni-P substrates are more reactive with the molten Sn-Bi solder than the crystallized ones. The interfacial reaction yields NiSn and a P-rich crystalline layer consisting mainly of NiP and NiSnP intermetallics. The presence of this layer dramatically retards the subsequent growth of the NiSn phase.
- Subjects
AMORPHOUS alloys; WETTING; EUTECTIC bonding process; SOLDER &; soldering; ANNEALING of metals; CHEMICAL relaxation; CRYSTALLIZATION; BIOCHEMICAL substrates
- Publication
Journal of Materials Science, 2014, Vol 49, Issue 7, p2932
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-013-8004-3