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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.


Cross-sectional morphologies for the Bi and Sn drops on the Fe78B13Si9 ribbons annealed at various temperatures. (a, d) 600 K, (b, f) 800 K, (c) 1000 K, and (e) 710 K.
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Figure 3: Cross-sectional morphologies for the Bi and Sn drops on the Fe78B13Si9 ribbons annealed at various temperatures. (a, d) 600 K, (b, f) 800 K, (c) 1000 K, and (e) 710 K.

Mentions: Figure 3a, b, c shows the cross-sectional morphologies of the Bi-Fe78B13Si9 interfaces. All the Bi drops were separated from the Fe78B13Si9 surfaces during either cooling or later cutting for metallographic sample preparation, indicating very weak interfacial bonding. A thorough EDS analysis on both the cross-sectional interfaces and the separated surfaces (i.e., the bottom surface of the solidified drops and the contact surface of the substrates) revealed the absence of any reaction layer and diffusion layer. Figure 3d, e, f shows the cross-sectional microstructures of the Sn-Fe78B13Si9 interfaces. In contrast to the Bi-Fe78B13Si9 couples, a much more intimate contact was observed for the solidified Sn drops on the amorphous substrates, indicating strong interfacial bonding. However, for the as-crystallized substrates, separation was also observed, suggesting that the crystallization greatly weakens the interfacial bonding.


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)

Cross-sectional morphologies for the Bi and Sn drops on the Fe78B13Si9 ribbons annealed at various temperatures. (a, d) 600 K, (b, f) 800 K, (c) 1000 K, and (e) 710 K.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 3: Cross-sectional morphologies for the Bi and Sn drops on the Fe78B13Si9 ribbons annealed at various temperatures. (a, d) 600 K, (b, f) 800 K, (c) 1000 K, and (e) 710 K.
Mentions: Figure 3a, b, c shows the cross-sectional morphologies of the Bi-Fe78B13Si9 interfaces. All the Bi drops were separated from the Fe78B13Si9 surfaces during either cooling or later cutting for metallographic sample preparation, indicating very weak interfacial bonding. A thorough EDS analysis on both the cross-sectional interfaces and the separated surfaces (i.e., the bottom surface of the solidified drops and the contact surface of the substrates) revealed the absence of any reaction layer and diffusion layer. Figure 3d, e, f shows the cross-sectional microstructures of the Sn-Fe78B13Si9 interfaces. In contrast to the Bi-Fe78B13Si9 couples, a much more intimate contact was observed for the solidified Sn drops on the amorphous substrates, indicating strong interfacial bonding. However, for the as-crystallized substrates, separation was also observed, suggesting that the crystallization greatly weakens the interfacial bonding.

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.