Silver-alumina solid state bonding: Study of diffusion and toughness close to the interface

Sérier, B.; Berroug, A.; Juvé, Daniel; Tréheux, D.; Moya, E.

doi:10.1016/0955-2219(93)90008-f

Cited by 14 publications

(4 citation statements)

References 10 publications

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“…Wang et al, 2016;Pan et al, 2021). The diffusivity of Mg is one to two orders of magnitude lower (log 10 (D[m 2 s -1 ]) ≈ -13; Ando, 1987), with other measured elements (Al, O, Ni, Ga, REE, Pt, Cr, Ag, Ti and Cu) diffusing more slowly, with caveats given that experimental temperature ranges mean that direct comparisons are not always possible (Oishi and Kingery, 1960;Paladino and Kingery, 1962;Reddy and Cooper, 1982;Lesage et al, 1983;Haneda and Monty, 1989;Moya et al, 1993;Sérier et al, 1993;Le Gall et al, 1994;Moya et al, 1995;Hickey et al, 1996;Moya et al, 1998;Gontier-Moya et al, 2001;Legros et al, 2005;Apostolopoulos et al, 2006;Takahashi et al, 2010;Fielitz et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…The only higher diffusivities measured in corundum are associated with H and its isotopes, with log 10 ( D [m 2 s –1 ]) between –8 and –10 at 1800°C (Hauffe and Hoeffgen, 1970; Roberts et al , 1979; El-Aiat and Kröger, 1982; Ramirez et al , 1997; Kronenberg et al , 2000; Belonoshko et al , 2004; Mao et al , 2013; F. Wang et al , 2016; Pan et al , 2021). The diffusivity of Mg is one to two orders of magnitude lower (log 10 ( D [m 2 s –1 ]) ≈ –13; Ando, 1987), with other measured elements (Al, O, Ni, Ga, REE, Pt, Cr, Ag, Ti and Cu) diffusing more slowly, with caveats given that experimental temperature ranges mean that direct comparisons are not always possible (Oishi and Kingery, 1960; Paladino and Kingery, 1962; Reddy and Cooper, 1982; Lesage et al , 1983; Haneda and Monty, 1989; Moya et al , 1993; Sérier et al , 1993; Le Gall et al , 1994; Moya et al , 1995; Hickey et al , 1996; Moya et al , 1998; Gontier-Moya et al , 2001; Legros et al , 2005; Apostolopoulos et al , 2006; Takahashi et al , 2010; Fielitz et al , 2020).…”

Section: Introductionmentioning

confidence: 99%

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Beryllium incorporation in corundum

Jollands

Balan

2022

MinMag

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The structure of corundum is not amenable to accommodating beryllium, yet Be is commonly added to corundum for purposes of colour modification. Where the main sites in corundum are octahedrally coordinated, Be is tetrahedrally coordinated in all known Be minerals. To attempt to explain this discrepancy, the configurations of Be in the Be-Al-O±H system were determined using density functional theory (DFT). In the Be-Al-O system, the most likely Be configuration is in triangular coordination, replacing Al and bonded to three oxygen on the basal plane (large triangle) of the Al-vacant octahedral site. When H is added, OH groups form at the opposite face of the same octahedron, pointing either into or out of the site. Be-H 2 (beryllium hydride) defects are also stable at the DFT level, with Be bonded to three O and one H. As some defects contain O-H or Be-H bonds, the DFT calculations can be corroborated by FTIR spectroscopy. Spectra recorded from 1000 corundum crystals with elevated Be confirm that bands centred at 3062 and 2490 cm -1 correspond to Be-associated defects. Polarised spectra show that the band at 2490 cm -1 resolves into two, one centred at 2491 cm -1 , with a shoulder at 2523 cm -1 , one of which is likely associated with a Be-H bond.The 3062 cm -1 band resolves into at least three, including a major band at 3058 cm -1 , a shoulder at 3140 cm -1 and a small, sharp band at 3082 cm -1 . Whilst there are caveats relating to curve fitting and baseline subtraction, the 3058 cm -1 band can likely be attributed to the defect where H points into the Al-vacant octahedral site, and the 3140 cm -1 band to the defect where the H points out. To our knowledge, this is the first occurrence of Be in triangular coordination proposed for a naturally occurring mineral. This substitution mechanism may also explain the high diffusivity of Be, as Be is effectively associated with its own Al vacancy.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Beryllium incorporation in corundum

Jollands

Balan

2022

MinMag

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“…The mechanical resistance of this assembly depends primarily on the conditions of its elaboration, particularity on the atmosphere of elaboration. The fracture resistance is generally determined according to the nature of the elaboration the atmosphere of this kind of junctions [12][13][14]. Silver is a noble metal and reacting with the alumina does not give an intermediate compound.…”

Section: Introductionmentioning

confidence: 99%

Finite element analysis of the interface defect in ceramic-metal assemblies: Alumina-Silver

Bouafia

Hadid

Sérier

et al. 2020

Frattura Ed Integrità Strutturale

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In the present work, the finite element analysis was employed to study the distribution of mechanical stress generated in metal-ceramic bimaterial. A micromechanical model is proposed to explain a phenomenon of defect observed in the metal-ceramic interface. The distribution of this stress in the ceramic around this defect was the subject of a numerical analysis using the finite element method. The analysis has been extended to the effect of defect-defect interaction, defect size and form.

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“…The fracture resistance is generally determined according to the nature of the atmosphere of the elaboration of these kinds of junction. [10][11][12] Silver is a noble metal and by reacting with the alumina do not give an intermediate compound. Assembly of this metal in alumina form no-reactive junction.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of the crack behavior interface-fiber: interfacial crack

Ramdoum¹,

Sérier²

2019

MSEIJ

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Background: Numerous studies have been conducted on composite materials, concerning development at the microscopic scale. In addition, the elaboration of composites at relatively high temperatures leads to very localized residual stresses in the fiber and the matrix in the neighborhood very close to their interface. These shear stresses put the fiber in compression and the matrix in tension. The objective of this work is to analyze the behavior of cracks initiated in the interface of a unidirectional ceramic fiber-reinforced composite and to study, in three dimensions by the finite element method, the effect of these constraints on the crack behavior appeared in this composite. This behavior is analyzed in terms of stress variation intensity factors in modes I, II and III. The effect of several parameters has been studied.

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Silver-alumina solid state bonding: Study of diffusion and toughness close to the interface

Cited by 14 publications

References 10 publications

Beryllium incorporation in corundum

Beryllium incorporation in corundum

Finite element analysis of the interface defect in ceramic-metal assemblies: Alumina-Silver

Numerical analysis of the crack behavior interface-fiber: interfacial crack

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