Interface instabilities of multilayers and flat precipitates

Junqua, N.; Grilhé, J.

doi:10.1080/01418619508236240

Cited by 12 publications

(11 citation statements)

References 26 publications

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“…Broadly speaking, there are three main thermodynamic driving forces that can affect layering stability at high temperatures: energy of mixing between the layer materials, elastic strain energy, and relative interfacial to grain boundary free energies [4][5][6][7][8][9][10]. Generally, the free energy of the multilayer can be reduced through interdiffusion between layers or morphological evolution to non-planar or discontinuous interfaces.…”

Section: Introductionmentioning

confidence: 99%

“…Considering the above-mentioned driving forces, one possible driving force for morphological instabilities in multilayer systems is the reduction of elastic strain energy, which can arise from numerous sources, including mismatches in lattice constants, thermal expansion coefficients, or elastic constants between the layers [5,10,11]. The main contribution to the elastic stresses in MLCCs arises from the mismatch of densification rates between the ceramic layers and metal electrodes during co-sintering [7,8].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Cr additions on the microstructural stability of Ni electrodes in ultra-thin BaTiO3 multilayer capacitors

et al. 2007

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Microstructural control in thin-layer multilayer ceramic capacitors (MLCC) is one of the present day challenges to maintain an increase in capacitive volumetric efficiency. This present paper opens a series of investigations aimed to engineer the stability of ultra-thin Ni electrodes in BaTiO 3 -based multilayer capacitors using refractory metal additions to Ni. Here, pure Ni and Ni-1 wt.% Cr alloy powders are used to produce 0805-type BME MLCCs with 300 active layers and with dielectric and electrode layer thickness around 1 μm. To investigate the continuity of Ni electrodes, both MLCC chips with pure and doped electrodes were sintered at different temperatures for 5 h. It is found that the continuity of Ni electrodes is improved most likely due to the effect of Cr on the lowmelting point (Ni,Ba,Ti) interfacial alloy layer formation. The interfacial alloy layer is not observed when Cr is segregated at Ni-BaTiO 3 interface in the Cr-doped samples, while it is found in all undoped samples. The interfacial alloy layer is believed to increase mass-transfer along the Ni-BaTiO 3 interfaces facilitating an acceleration of Ni electrodes discontinuities.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Cr additions on the microstructural stability of Ni electrodes in ultra-thin BaTiO3 multilayer capacitors

et al. 2007

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“…It is worth mentioning that Eqs. (42) and (43) are the general formulae, including two special cases with jd 1 j ¼ jd 2 j of the same phase and the opposite phase as discussed by Sridhar et al (1997b) and Junqua and Grilhé (1995). To analyze the opposite phase, one can add a negative sign to d 2 or d 1 .…”

Section: Deformation Field To the First Order Of Approximationmentioning

confidence: 98%

“…In contrast to the chemical potential used in the literature (Larche and Cahn, 1985;Leo and Sekerka, 1989;Junqua and Grilhé, 1995), the strain energy from the coherence of the interface is included in the calculation of DU F E due to the use of Eqs. (3)-(5).…”

Section: Problem Formulationmentioning

confidence: 99%

“…Junqua and Grilhé (1995) used the dislocation mechanics to analyze the interfacial instabilities of a layer confined by two semi-infinite solids from the energetic viewpoint, in which the interfacial perturbations had the same perturbation amplitude with the same phase or the opposite phase. Lu et al (2004) discussed the effect of the substrate thickness on the interfacial stability in an epitaxially strained film deposited on a substrate.…”

Section: Introductionmentioning

confidence: 99%

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Stress-driven interfacial instability of a bilayer structure: The interaction between free surface and interface

Song

Yang

2008

International Journal of Solids and Structures

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The morphological evolution of strained films is of technological importance to microelectronics and nanotechnology. The morphological instability of a bilayer system is analyzed, consisting of an elastic film and an elastic substrate with a misfit strain on the coherent interface. A kinetic model is derived by considering the morphological fluctuations of different perturbation amplitudes along both the free surface and the interface and the coupling effect between the film and the substrate. The couplings include the misfit strain, surface/interface energy, and surface/interface diffusion, which determine the morphological instability of the system. A quadratic dispersion relationship is established for the growth rate of the longitudinal surface and interfacial perturbations along the free surface and the interface, respectively. The propagation of the surface perturbations is revealed from the free surface to the interface, and the characteristic frequencies are identified for the initiation of the morphological instability.

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Fabricated Metal Laminates via Cold Roll Bonding Techniques

Yu,

Gao,

2024

High-Performance Metallic Composites Fabricated by Advanced Rolling Techniques

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Interface instabilities of multilayers and flat precipitates

Cited by 12 publications

References 26 publications

Effect of Cr additions on the microstructural stability of Ni electrodes in ultra-thin BaTiO3 multilayer capacitors

Effect of Cr additions on the microstructural stability of Ni electrodes in ultra-thin BaTiO3 multilayer capacitors

Stress-driven interfacial instability of a bilayer structure: The interaction between free surface and interface

Fabricated Metal Laminates via Cold Roll Bonding Techniques

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