Effect of substrate annealing on the wetting of metastable BNi-2 ribbons by molten Sn

2010 
Wetting of metastable BNi-2 substrates annealed at various temperatures (550–900 K) by molten Sn was investigated at a constant temperature of 550 K in a high vacuum using a modified sessile drop method. The spreading was the fastest for Sn on the amorphous substrate annealed at 550 K. With increasing annealing temperature, the wettability became worse, being the poorest for the substrate annealed at 750 K, and then improved. The wetting behavior was strongly affected by the structural and energetic changes from amorphous to nanocrystalline states, so were the atomic diffusion and interfacial reaction. The plausible correlations among the wetting behavior, the structural change, and the interfacial reaction were addressed.
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