The Mechanism of Periodic Layered Structure Formation in Ni3Si/Zn System

Su, Xuping; Gao, Cuiping; Li, Zhenfeng; Wang, Jianhua; Liu, Shupei; Ya, Liu; Peng, Haoping

doi:10.1007/s11669-013-0251-0

Cited by 10 publications

(7 citation statements)

References 14 publications

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“…After that, various reports have been published that are focused on the formation of such periodic layered structure in solid-solid reaction systems, such as NiCoFe/Mg [13], SiO 2 /Mg [14], Co 2 Si/Zn [15], SiC/Ni [16], Sn/Ni-7 wt. %V [17], Fe 3 Si/Zn [18] and Ni 3 Si/Zn [19][20]. Recently Liu et al [21] observed the periodic layered structure with alternating layers in the reactions of FeCr alloys and molten Zn.…”

Section: Introductionmentioning

confidence: 99%

Formation of periodic layered structure during hot-dip galvanizing in Al-Zn-Mg bath

Gao

Kuang

et al. 2016

Surface and Coatings Technology

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This study investigated the effect of Al and Mg content and immersion time on the formation of periodic layered structure during hot-dip galvanizing in Al-Zn-Mg bath. The steel substrates were immersed in Al-Zn bath for 10 s to 120 s, with five levels of Al content in the range of 15 to 55 wt.%, and four levels of Mg additions, in the range of 0.5 to 3.0 wt.%. The microstructure and constituent phases of the periodic layered structure were characterized by optical microscopy, scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction and X-ray photoelectron spectroscopy. The coating with periodic layered structure contains a thin light gray Fe 2 Al 5 Zn x layer near substrate and outer periodic layered structure.The periodic layered structure consists of alternating light gray layer (FeAl 3 Zn x ) and black 2 gray layer (Al dendrites and Zn-rich interdendritic regions). The formation of periodic layered structure requires an incubation period t 1 , while if the immersion time is over t 2 , the periodic layered structure is destroyed. In addition, t 1 and t 2 varies with the Al content and Mg addition.

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Section: Introductionmentioning

confidence: 99%

Formation of periodic layered structure during hot-dip galvanizing in Al-Zn-Mg bath

Gao

Kuang

et al. 2016

Surface and Coatings Technology

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“…Till now, the periodic layered structure has been evidenced in the other systems [16][17][18][19][20][21][22][23][24][25][26][27][28][29]. Not only in the solid state reaction [16][17][18][19][20][21][22][23][24], but also in the solid-liquid reaction [25][26][27][28], even solid-vapor reaction [29]. In this kind of structure, phase layers appears periodically in time and space.…”

Section: Formation Mechanism Of Periodic Layered Structurementioning

confidence: 99%

Formation of periodic layered structure during reaction between Co2Si and liquid Zn

Liu

Tang

Dong

et al. 2016

Surface and Coatings Technology

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Reactions of Co 2 Si alloy with liquid zinc for annealing time up to 720 minutes were studied by means of scanning electron microscope, energy-dispersive X-ray spectroscope and electron backscattered diffraction techniques. The results showed that periodic patterns, Co 2 Si / (γ 2 + η-Zn), were observed in the reaction zone, and its thickness and morphology were dependent on the crystallographic orientation of Co 2 Si grain. The relationship between anisotropy growth of the periodic patterns and crystal structure was explained with the concept of dangling bonds. The thermodynamic foundation and mechanism of formation of the periodic layered structure were elaborated in this paper.

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“…The formation of alternating layers during solid-state reactions in Fe 3 Si/Zn diffusion couples was first discovered by Osinski et al [17]. In recent five years, some other systems identified with such periodic patterns have been reported, e.g., CuTi/Zn [18], Ni 3 Si/ Zn [19,20], (Ni,W)/Al [21], Sn-Cu/Ni-Co [22],Sn/(Bi 0.25 Sb 0.75 ) 2 Te 3 [23], and Au-12Ge/Ni [24]. A literature survey shows that, at least, three mechanisms have been proposed to explain this phenomenon [25]:…”

Section: Alternating Layer Formationmentioning

confidence: 99%

“…Due to mobility differences of species, slow diffusion species would accumulate at the reaction front leading to another phase precipitate within the matrix phase. Su et al [20] employed this mechanism in the Ni 3 Si/Zn and CuTi/Zn systems [18]. However, the concentration fluctuation at the reaction front is not really evidenced experimentally.…”

Section: Alternating Layer Formationmentioning

confidence: 99%

“…This model explained the formation of alternating layers consisting of singlephase bands. Actually, in papers in recent years [18][19][20] twophase structures of the bands are always observed. However, Lin et al reported alternation band in the Au-12Ge/Ni joints consisting of a single-phase layer of (Au,Ni,Ge) and NiGe, respectively [24].…”

Section: Alternating Layer Formationmentioning

confidence: 99%

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