Metal hetero-diffusion along the metal-ceramic interfaces: A case study of Au diffusion along the Ni-sapphire interface

Barda, Hagit; Rabkin, Eugen

doi:10.1016/j.actamat.2019.12.051

Cited by 19 publications

(4 citation statements)

References 33 publications

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“…The diffusion of Au at interfaces should thus be the most active mechanism of diffusion and is also favored because the Fe NPs and the amorphous silica form an incoherent interface with a low contact area. Au diffusion was also recently reported at a metal-ceramic interface, namely the Ni-sapphire interface [26]. The authors demonstrate that this interface diffusion was faster than the bulk diffusion of Au in Ni, in the investigated range of annealing temperature (450-550 • C).…”

Section: Adhesion and Orientation Of The Nps On Silicamentioning

confidence: 51%

Self-organization mechanisms in a Fe-Au film: from isolated core-shell to multicore nanoparticles

Combettes

Hungrı́a

Barré

et al. 2022

Eur. Phys. J. Appl. Phys.

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Many nanotechnological applications necessitate a high density of nanoparticles (NPs), making NP morphology control highly challenging. In this work, the morphology of bimetallic NPs formed by magnetron sputtering deposition of a Fe(3nm)-Au(2nm) bilayer film on an amorphous silica substrate is analyzed using high-angle dark-field scanning transmission electron microscopy (HAADF-STEM). While all the NPs adopt a Fe-Au core-shell chemical order, they can be sorted into three different types. Isolated NPs, displaying either a highly symmetric centered core geometry (CC-type) or an asymmetrical off-centered core geometry (OC-type), are observed despite the rather large metallic volume. The majority of the NPs however displays a multicore geometry, with Fe cores in the 10-12 nm range, larger than the NPs observed in a pure Fe (3nm) film grown under identical conditions. The driving forces leading to the different morphologies are discussed together with the role played by the environnement.

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Section: Adhesion and Orientation Of The Nps On Silicamentioning

confidence: 51%

Self-organization mechanisms in a Fe-Au film: from isolated core-shell to multicore nanoparticles

Combettes

Hungrı́a

Barré

et al. 2022

Eur. Phys. J. Appl. Phys.

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“…In recent years, both in situ and ex situ studies have been developed to focus on the growth kinetic and inuencing factors of UTGLs formation on the different substrates, including solid substrates (e.g., silicon (Si) wafers and oxides thin lms), 16,22,[32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47] so substrates (e.g., polymer thin lms), 28,[48][49][50][51][52][53][54][55][56][57][58] and nanostructured substrates (e.g., phase-separated polymer lms, nanostructured oxides thin lms, and quantum dot arrays). [59][60][61][62][63][64] 2.1 On solid substrates Depositing Au on a at solid substrate, such as Si wafer, is regarded as the idealized case to study the UTGL growth without other inuencing factors. Therefore, many fundamental studies focused on the growth processes of UTGLs on Si wafers and other at solid substrates.…”

Section: Formation Fundamentals Of Ultrathin Gold Layers On Different...mentioning

confidence: 99%

State of the art of ultra-thin gold layers: formation fundamentals and applications

et al. 2022

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“…Their results, supported by first-principles density-functional theory (DFT) calculations, suggest that the rate of Ni diffusion along this interface is close to the rate of Ni self-diffusion in Ni GBs. On the other hand, Barda et al [32] applied a similar experimental method and found that Au hetero-diffusion along the same Ni-Al 2 O 3 interface was slower than Au hetero-diffusion in Ni GBs.…”

Section: Introductionmentioning

confidence: 99%

Atomistic modeling of metal-nonmetal interphase boundary diffusion

Chesser¹,

Koju²,

Vellore³

2023

Preprint

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Atomistic computer simulations are applied to investigate the atomic structure, thermal stability, and diffusion processes in Al-Si interphase boundaries as a prototype of metalceramic interfaces in composite materials. Some of the most stable orientation relationships between the phases found in this work were previously observed in epitaxy experiments. A non-equilibrium interface can transform to a more stable state by a mechanism that we call interface-induced recrystallization. Diffusion of both Al and Si atoms in stable Al-Si interfaces is surprisingly slow compared with diffusion of both elements in Al grain boundaries but can be accelerated in the presence of interface disconnections. A qualitative explanation of the sluggish interphase boundary diffusion is proposed. Atomic mechanisms of interphase boundary diffusion are similar to those in metallic grain boundaries and are dominated by correlated atomic rearrangements in the form of strings and rings of collectively moving atoms.

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Metal hetero-diffusion along the metal-ceramic interfaces: A case study of Au diffusion along the Ni-sapphire interface

Cited by 19 publications

References 33 publications

Self-organization mechanisms in a Fe-Au film: from isolated core-shell to multicore nanoparticles

Self-organization mechanisms in a Fe-Au film: from isolated core-shell to multicore nanoparticles

State of the art of ultra-thin gold layers: formation fundamentals and applications

Atomistic modeling of metal-nonmetal interphase boundary diffusion

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