Interface sharpening in miscible Ni/Cu multilayers studied by atom probe tomography

Balogh, Zoltán; Chellali, Mohammed Reda; Greiwe, Gerd Hendrik; Schmitz, Guido; Erdélyi, Zoltán

doi:10.1063/1.3658390

Cited by 23 publications

(25 citation statements)

References 19 publications

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“…This interesting behavior has also been observed in our previous EELS investigation [8]. The compositional oscillation is not expected in the composition profile due to thermally activated diffusion [9][10][11] thus it is a unique behavior induced by deformation. The composition profile across the multilayers for Ni/V after 60 passes that was measured by EELS shows a continuous variation between end members as shown in Fig.…”

Section: Resultssupporting

confidence: 55%

Mixing behaviors in Cu/Ni and Ni/V multilayers induced by cold rolling

Wang

Perepezko

Larson

et al. 2015

Journal of Alloys and Compounds

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Section: Resultssupporting

confidence: 55%

Mixing behaviors in Cu/Ni and Ni/V multilayers induced by cold rolling

Wang

Perepezko

Larson

et al. 2015

Journal of Alloys and Compounds

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“…36 Atom probe tomography (APT) investigation of sputtered Cu/Ni multilayers also shows a smoothly and monotonically varying composition between the pure elements upon isothermal annealing. 37 The asymmetry in the interdiffusion mobility of the two species was revealed by experimental observations that Ni diffuses into Cu faster than Cu diffuses into Ni causing the complete consumption of pure Cu sooner than pure Ni. 37 The same behavior has also been simulated using the Kinetic Monte Carlo method.…”

Section: Introductionmentioning

confidence: 96%

“…37 The asymmetry in the interdiffusion mobility of the two species was revealed by experimental observations that Ni diffuses into Cu faster than Cu diffuses into Ni causing the complete consumption of pure Cu sooner than pure Ni. 37 The same behavior has also been simulated using the Kinetic Monte Carlo method. 38 The interdiffusion coefficients of Ni in Cu 39 and Cu in Ni 40 have been measured and found to be D NiinCu ¼ 1:95 exp ðÀ236:35=RTÞ cm 2 s À1 ;…”

Section: Introductionmentioning

confidence: 96%

Intermixing in Cu/Ni multilayers induced by cold rolling

Wang

Perepezko

Larson

et al. 2015

Journal of Applied Physics

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Repeated cold rolling was performed on multilayers of Cu60/Ni40 and Cu40/Ni60 foil arrays to study the details of driven atomic scale interfacial mixing. With increasing deformation, there is a significant layer refinement down to the nm level that leads to the formation of a solid solution phase from the elemental end members. Intriguingly, the composition of the solid solution is revealed by an oscillation in the composition profile across the multilayers, which is different from the smoothly varying profile due to thermally activated diffusion. During the reaction, Cu mixed into Ni preferentially compared to Ni mixing into Cu, which is also in contrast to the thermal diffusion behavior. This is confirmed by observations from X-ray diffraction, electron energy loss spectrum and atom probe tomography. The diffusion coefficient induced by cold rolling is estimated as 1.7 Â 10 À17 m 2 /s, which cannot be attributed to any thermal effect. The effective temperature due to the deformation induced mixing is estimated as 1093 K and an intrinsic diffusivity d b , which quantifies the tendency towards equilibrium in the absence of thermal diffusion, is estimated as 6.38 Â 10 À18 m 2 /s. The fraction of the solid solution phase formed is illustrated by examining the layer thickness distribution and is described by using an error function representation. The evolution of mixing in the solid solution phase is described by a simplified sinusoid model, in which the amplitude decays with increased deformation level. The promoted diffusion coefficient could be related to the effective temperature concept, but the establishment of an oscillation in the composition profile is a characteristic behavior that develops due to deformation. V C 2015 AIP Publishing LLC. [http://dx.

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“…5,10 Nowadays, this field remains active and has been extended with the development of atomic simulations and many microscopy techniques like atom probe tomography which give details on the intermixing mechanisms. 11,12 As mentioned, the starting point of the present x-ray diffraction study comes from recent atomistic simulation results obtained for coherent CuNi multilayers. It is found that an unusual layer-by-layer interdiffusion mode should take place in such systems even though Cu and Ni elements are highly miscible.…”

Section: Introductionmentioning

confidence: 99%

Thermoelasticity and interdiffusion in CuNi multilayers

et al. 2012

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X-ray scattering experiments on coherent CuNi multilayers are performed at various annealing temperatures. First, we show that the classical thermoelasticity theory can be applied in such nanosamples to link composition and strain fields at intermediate temperature. Second, when interdiffusion takes place at higher temperature, the satellite peaks measured at different annealing times indicate the presence of a layer-by-layer interdiffusion mode controlled by the asymmetry of the atomic mobilities in this system.

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Interface sharpening in miscible Ni/Cu multilayers studied by atom probe tomography

Cited by 23 publications

References 19 publications

Mixing behaviors in Cu/Ni and Ni/V multilayers induced by cold rolling

Mixing behaviors in Cu/Ni and Ni/V multilayers induced by cold rolling

Intermixing in Cu/Ni multilayers induced by cold rolling

Thermoelasticity and interdiffusion in CuNi multilayers

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