The wetting of Fe78B13Si9 ribbon and liquid Sn

The wetting behaviors of liquid Sn on three types of Fe78B13Si9 substrate, an amorphous substrate and two types of pre-annealed substrate at 400 and 450 degreesC, were studied by the sessile drop technique between 350-450 degreesC. The equilibrium contact angle of the amorphous Fe78B13Si9 substrate did not decrease monotonically with increasing temperature, which is evidently different from that of polycrystalline alloy substrate. Pre-annealing of Fe78B13Si9 substrate made its wettability very poor when the wetting temperature was lower than the pre-annealing temperature. However, when the wetting temperature was higher than the pre-annealing temperature, pre-annealing of substrate had little effect on the equilibrium contact angle.