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Wettability of amorphous and nanocrystalline Fe78B13Si9 substrates by molten Sn and Bi.

Shen P, Sun J, Yang J, Qi Y, Jiang Q - Nanoscale Res Lett (2011)

Bottom Line: The wettability of amorphous and annealing-induced nanocrystalline Fe78B13Si9 ribbons by molten Sn and Bi at 600 K was measured using an improved sessile drop method.The results demonstrate that the structural relaxation and crystallization in the amorphous substrates do not substantially change the wettability with molten Bi because of their invariable physical interaction, but remarkably deteriorate the wettability and interfacial bonding with molten Sn as a result of changing a chemical interaction to a physical one for the atoms at the interface.

View Article: PubMed Central - HTML - PubMed

Affiliation: Key Laboratory of Automobile Materials, College of Materials Science and Engineering, Jilin University, Changchun 130025, PR China. shenping@jlu.edu.cn.

ABSTRACT
The wettability of amorphous and annealing-induced nanocrystalline Fe78B13Si9 ribbons by molten Sn and Bi at 600 K was measured using an improved sessile drop method. The results demonstrate that the structural relaxation and crystallization in the amorphous substrates do not substantially change the wettability with molten Bi because of their invariable physical interaction, but remarkably deteriorate the wettability and interfacial bonding with molten Sn as a result of changing a chemical interaction to a physical one for the atoms at the interface.

No MeSH data available.


XRD patterns for the Fe78B13Si9 substrates annealed at various temperatures for 10 min and then after the wetting at 600 K for 1 h.
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Figure 1: XRD patterns for the Fe78B13Si9 substrates annealed at various temperatures for 10 min and then after the wetting at 600 K for 1 h.

Mentions: Figure 1 shows the XRD patterns of the Fe78B13Si9 ribbons after annealing at various temperatures for 10 min and then wetting at 600 K for 1 h. As indicated, when the annealing temperature (hereafter represented by Ta) was no more than 725 K, the Fe78B13Si9 ribbons were basically still in the amorphous state. Nevertheless, as a result of heating, structural relaxation may take place, which caused changes in the arrangement of the atoms within the amorphous structure before the beginning of the crystallization. As the annealing temperature rose, a weak diffraction peak, corresponding to α-Fe(Si), began to appear when Ta was 725 K, which was much lower than the crystallization onset temperature (Tc) determined by DSC. This result might be explained by the fact that the thermal stability of the amorphous Fe78B13Si9 alloy is relatively poor and an isothermal dwell at temperatures lower than Tc could lead to its crystallization [12,13]. With a further increase in Ta, the amorphous structure gradually faded away, replaced by the emergence of multiphases such as α-Fe(Si), Fe3Si, Fe15B2Si3, and Fe2B in the matrix. However, only the Fe3Si and Fe2B IMCs were finally stable in the substrates annealed at high temperatures. Based on the Scherrer equation [15], the average grain size of the precipitated phases was estimated to be no more than 70 nm even after annealing at 1000 K for 10 min, suggesting that the ribbons were in the nanocrystalline state after polycrystallization.


Wettability of amorphous and nanocrystalline Fe78B13Si9 substrates by molten Sn and Bi.

Shen P, Sun J, Yang J, Qi Y, Jiang Q - Nanoscale Res Lett (2011)

XRD patterns for the Fe78B13Si9 substrates annealed at various temperatures for 10 min and then after the wetting at 600 K for 1 h.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211405&req=5

Figure 1: XRD patterns for the Fe78B13Si9 substrates annealed at various temperatures for 10 min and then after the wetting at 600 K for 1 h.
Mentions: Figure 1 shows the XRD patterns of the Fe78B13Si9 ribbons after annealing at various temperatures for 10 min and then wetting at 600 K for 1 h. As indicated, when the annealing temperature (hereafter represented by Ta) was no more than 725 K, the Fe78B13Si9 ribbons were basically still in the amorphous state. Nevertheless, as a result of heating, structural relaxation may take place, which caused changes in the arrangement of the atoms within the amorphous structure before the beginning of the crystallization. As the annealing temperature rose, a weak diffraction peak, corresponding to α-Fe(Si), began to appear when Ta was 725 K, which was much lower than the crystallization onset temperature (Tc) determined by DSC. This result might be explained by the fact that the thermal stability of the amorphous Fe78B13Si9 alloy is relatively poor and an isothermal dwell at temperatures lower than Tc could lead to its crystallization [12,13]. With a further increase in Ta, the amorphous structure gradually faded away, replaced by the emergence of multiphases such as α-Fe(Si), Fe3Si, Fe15B2Si3, and Fe2B in the matrix. However, only the Fe3Si and Fe2B IMCs were finally stable in the substrates annealed at high temperatures. Based on the Scherrer equation [15], the average grain size of the precipitated phases was estimated to be no more than 70 nm even after annealing at 1000 K for 10 min, suggesting that the ribbons were in the nanocrystalline state after polycrystallization.

Bottom Line: The wettability of amorphous and annealing-induced nanocrystalline Fe78B13Si9 ribbons by molten Sn and Bi at 600 K was measured using an improved sessile drop method.The results demonstrate that the structural relaxation and crystallization in the amorphous substrates do not substantially change the wettability with molten Bi because of their invariable physical interaction, but remarkably deteriorate the wettability and interfacial bonding with molten Sn as a result of changing a chemical interaction to a physical one for the atoms at the interface.

View Article: PubMed Central - HTML - PubMed

Affiliation: Key Laboratory of Automobile Materials, College of Materials Science and Engineering, Jilin University, Changchun 130025, PR China. shenping@jlu.edu.cn.

ABSTRACT
The wettability of amorphous and annealing-induced nanocrystalline Fe78B13Si9 ribbons by molten Sn and Bi at 600 K was measured using an improved sessile drop method. The results demonstrate that the structural relaxation and crystallization in the amorphous substrates do not substantially change the wettability with molten Bi because of their invariable physical interaction, but remarkably deteriorate the wettability and interfacial bonding with molten Sn as a result of changing a chemical interaction to a physical one for the atoms at the interface.

No MeSH data available.