Modelling and Measurements of Stress-Controlled Interdiffusion in Multilayered Amorphous Alloys

Yang, Fu-Liang; Shih, Wei-Kuan; Greer, A.L.

doi:10.1557/proc-356-21

Cited by 3 publications

(4 citation statements)

References 21 publications

(31 reference statements)

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“…Studies on amorphous Ni-Zr multilayers 34,36,37,39,114 claim to have confirmed the predictions of the theory of Refs. 115 , and interpret the initial stages of fast interdiffusion not as subject to structural relaxation (cf.…”

Section: Diffusion-induced Stress Effects On Interdiffusion In Thesupporting

confidence: 73%

“…Several studies 34,36,37,39,114 claim a stress dependence of the (inter)diffusion coefficient in amorphous multilayers. These studies follow the theoretical treatment of Refs.…”

Section: Diffusion-induced Stress Effects On Interdiffusion In Thementioning

confidence: 99%

“…While interdiffusion, [32][33][34][35][36][37] impurity diffusion, [38][39][40][41][42] and self-diffusion [43][44][45][46] have been investigated in various metallic glasses, no diffusion data are available in the literature for amorphous Al x Zr 1Àx solid solutions.…”

Section: Introductionmentioning

confidence: 99%

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Interdiffusion in amorphous AlxZr1-x alloys

Noah

Wang

Mittemeijer

2017

Journal of Applied Physics

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Interdiffusion in amorphous AlxZr1−x compositionally modulated multilayers was investigated by Auger electron spectroscopy sputter-depth profiling. Microstructural characterisation was performed by X-ray diffraction and cross-sectional transmission electron microscopy. The temperature-dependent chemical diffusion coefficient could be deduced at a series of temperatures in the range of 356 °C to 415 °C and was found to be weakly dependent on composition. The activation enthalpy for the chemical diffusion coefficients is slightly smaller at the composition of the Al-rich am-Al0.62Zr0.38 sublayer (1.6 eV) than at the composition of the Zr-rich am-Al0.27Zr0.73 sublayer (1.8 eV), which is not related to the concentration dependence of the excess free volume but to the smaller atomic size and mass of Al as compared to Zr. The smaller activation enthalpy for interdiffusion in partially crystallised specimens than in entirely amorphous AlxZr1−x multilayers is ascribed to the relatively large excess free volume in the grain boundaries of the nanocrystalline sublayers, as compared to the amorphous phase, at large Al concentrations. On the basis of an evaluation of the role of diffusion-induced stress in amorphous systems, it is shown that stresses induced by interdiffusion relax relatively fast by viscous flow and do not affect the determined diffusion coefficients.

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Section: Diffusion-induced Stress Effects On Interdiffusion In Thesupporting

confidence: 73%

“…Several studies 34,36,37,39,114 claim a stress dependence of the (inter)diffusion coefficient in amorphous multilayers. These studies follow the theoretical treatment of Refs.…”

Section: Diffusion-induced Stress Effects On Interdiffusion In Thementioning

confidence: 99%

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Interdiffusion in amorphous AlxZr1-x alloys

Noah

Wang

Mittemeijer

2017

Journal of Applied Physics

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“…The Ni-Zr system is characterized by both strong miscibility and asymmetric diffusion of its components. Both these factors contribute to the rapid intermixing between Ni and Zr in multilayers and also to the build up of large stresses in this system due to unbalanced diffusional flow [22,23]. It has also been noted that the mechanical strength of these materials is related to this interdiffusional strain.…”

Section: Introductionmentioning

confidence: 99%

Thermal stability of interfacial mixed layers in c-Ni/a-Zr multilayer during annealing: Structural and magnetic properties

Bhattacharya

Karki

Singh

et al. 2022

Applied Surface Science

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Annealing of crystalline multilayers composed of two miscible elements usually causes interfacial mixing of the constituent atoms, possibly leading to the formation of binary alloys at the interfaces. Magnetron sputtered c-Ni/ a-Zr multilayers deposited at room temperature were vacuum annealed isochronally at 200 • C and 400 • C to observe thermal stability of the interfaces constituting the crystalline/amorphous multilayers. Control over the interfacial behaviour can aid the formation of materials with novel properties. The resultant changes in structural and magnetic properties of the multilayers were investigated in detail through X-ray Reflectivity, Polarized Neutron Reflectivity, SIMS and SQUID-based magnetization measurement techniques. The compositional variations in the amorphous mixed layers formed at the Ni-on-Zr and Zr-on-Ni interfaces due to atomic transport, were carefully observed as a function of annealing. Interface widths proceeded to increase with annealing at the expense of the Ni and Zr layers. The Ni-on-Zr interface was seen to be unstable at both temperatures; but the overall response of the interfaces to atomic diffusion was more pronounced when the multilayers were annealed at 400 • C. Under conditions of supersaturation of atoms within restricted spaces of the interfacial layers and the limited availability of components within the multilayer, unexpected demixing effects were observed at both the interfaces. A large increase in magnetic moment obtained after annealing at 400 • C, was attributed to the high densification of the Ni layers as well as to the incorporation of Ni crystallites into the Zr-on-Ni interface layers.

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Measurements of atomic diffusion using metallic multilayers

Greer

1997

Current Opinion in Solid State and Materials Science

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Modelling and Measurements of Stress-Controlled Interdiffusion in Multilayered Amorphous Alloys

Cited by 3 publications

References 21 publications

Interdiffusion in amorphous AlxZr1-x alloys

Interdiffusion in amorphous AlxZr1-x alloys

Thermal stability of interfacial mixed layers in c-Ni/a-Zr multilayer during annealing: Structural and magnetic properties

Measurements of atomic diffusion using metallic multilayers

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