Influence of the microstructure on the interreaction of Al/Ni investigated by tomographic atom probe

Jeske, T.; Schmitz, Guido

doi:10.1016/s0921-5093(01)01886-x

Cited by 26 publications

(16 citation statements)

References 19 publications

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“…As a result, Al 3 Ni or a mixture of Al 3 Ni and Al solid solution in Ni were formed. It was reported [24,27,29,[45][46][47] that the manufacturing process parameters, such as the build-up of the stacked sandwich sample, the strain levels, and ensuing defect concentration, alter the phase formation sequence and their growth kinetics. Although further verification is required to clarify the effect of these parameters in a comprehensive manner, a large number of reports have confirmed that the first kinetically favored intermetallic phase is the Al 3 Ni compound.…”

Section: Atomic Diffusivity Observationsmentioning

confidence: 99%

The Effect of Strain on the Formation of an Intermetallic Layer in an Al-Ni Laminated Composite

Azimi

Toroghinejad

Shamanian

et al. 2017

Metals

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Abstract:In the present work, the influence of strain on phase formation at the Al/Ni interface was investigated during cold roll bonding and annealing. A sandwich sample composed of an Al-Ni-Al stack was cold rolled with reductions in the range of 50% to 90%, followed by annealing at 450 • C for 60 min. The crystallography of the annealed sandwich samples was analyzed by XRD (X-ray diffraction), whereas the microstructure was studied by scanning electron microscopy, equipped with EDS (energy dispersive spectrometer) analysis, and optical microscope. In the annealed samples, the intermetallic phase Al 3 Ni has formed at the Ni/Al interface, preferentially on the Al side of the interface. It is found that the applied strains did not have an effect on the type of intermetallic phase that was formed. However, the rolling reduction has a significant effect on the morphology of the intermetallic layer, as it was observed that after the lowest reduction of 50% only some scattered intermetallic nuclei were present, whereas at the highest rolling reduction of 90% a continuous intermetallic layer of 4.1 µm was exhibited. The formation of the intermetallic layer is discussed in terms of Al and Ni diffusion at the interface and irregular nature of the Al/Ni bonded interface after rolling reductions.

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Section: Atomic Diffusivity Observationsmentioning

confidence: 99%

The Effect of Strain on the Formation of an Intermetallic Layer in an Al-Ni Laminated Composite

Azimi

Toroghinejad

Shamanian

et al. 2017

Metals

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“…106 Other researchers have performed fundamental studies of phase stability and interdiffusion. 107,131,132 There is an excellent match between the strengths of the atom probe technique and the needs of this application area. The ability to characterize buried interfaces compositionally in a three-dimensional image is the key.…”

Section: Multilayer Filmsmentioning

confidence: 99%

Atom probe tomography

Kelly¹,

Miller

2007

Review of Scientific Instruments

758

345

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The technique of atom probe tomography ͑APT͒ is reviewed with an emphasis on illustrating what is possible with the technique both now and in the future. APT delivers the highest spatial resolution ͑sub-0.3-nm͒ three-dimensional compositional information of any microscopy technique. Recently, APT has changed dramatically with new hardware configurations that greatly simplify the technique and improve the rate of data acquisition. In addition, new methods have been developed to fabricate suitable specimens from new classes of materials. Applications of APT have expanded from structural metals and alloys to thin multilayer films on planar substrates, dielectric films, semiconducting structures and devices, and ceramic materials. This trend toward a broader range of materials and applications is likely to continue.

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“…The Al-Ni system was chosen as a model system since it is both attractive for applications, e.g. in superalloys or as coatings of III-V semiconductors, and has also been studied thoroughly concerning the microstructure-and the phase evolution [10,11,[13][14][15][16][17][18][19][20][21]. In the studies reported so far, thin Al/Ni multilayers have mostly been deposited by sputtering [17,19,20] or electron-beam evaporation [16,[19][20][21], while repeated folding and cold rolling of Al and Ni foils was also applied as an alternative process to synthesize Al-Ni multilayer foils [10-12, 14, 18].…”

mentioning

confidence: 99%

“…This is explained by the asymmetry of the interdiffusion coefficients, with Ni diffusing much more rapidly into Al than Al into Ni [22,23]. However, depending on the nominal composition of the multilayer and on the processing history, also different initial intermediate phases such as AlNi [19,20,[24][25][26], AlNi 3 [10] or a metastable Al 9 Ni 2 -phase [24,27] Argon flow for 2 min at 250°C. This temperature was chosen because it is close to the onset for the Al 3 Ni formation [12,14,17,18], and the duration was sufficiently short to avoid significant grain growth.…”

mentioning

confidence: 99%

Non-equilibrium intermixing and phase transformation in severely deformed Al/Ni multilayers

Sauvage

Dinda²,

Wilde

2007

Scripta Materialia

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Al/Ni multilayers have been prepared by repeated folding and cold rolling (F&R) of elemental foils. The thickness of Al and Ni foils is reduced down to less than 50 nm after fifty F&R cycles. Three-dimensional atom probe analyses clearly reveal the presence of supersaturated solid solutions and give the evidence of deformation-induced intermixing. The formation of the solid solutions and their transformation into the Al 3 Ni phase upon annealing is discussed.

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Influence of the microstructure on the interreaction of Al/Ni investigated by tomographic atom probe

Cited by 26 publications

References 19 publications

The Effect of Strain on the Formation of an Intermetallic Layer in an Al-Ni Laminated Composite

The Effect of Strain on the Formation of an Intermetallic Layer in an Al-Ni Laminated Composite

Atom probe tomography

Non-equilibrium intermixing and phase transformation in severely deformed Al/Ni multilayers

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