Shear strength and sliding at a metal–ceramic (aluminum–spinel) interface at ambient and elevated temperatures

Singh, Gurpreet; Yu, Yeonseop; Ernst, F.; Raj, Rishi

doi:10.1016/j.actamat.2007.01.008

Cited by 20 publications

(11 citation statements)

References 15 publications

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“…Particularly, the characteristic width of grain boundaries does not exceed a few nanometers, whereas the width of phase interfaces may vary within several orders of magnitude and reach a few micrometers (as is observed, e.g., in sintered metal-ceramic composites [49]). The ''wide'' phase interfaces have a pronounced gradient of the internal nanostructure (vacancy and dislocation densities, secondary nanoinclusions) and mechanical properties in transition from one phase to another [50][51][52][53].…”

Section: Direct and Indirect Models Of Interfaces Between Structural mentioning

confidence: 99%

Overcoming the limitations of distinct element method for multiscale modeling of materials with multimodal internal structure

Shilko

Psakhie

Schmauder

et al. 2015

Computational Materials Science

108

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Section: Direct and Indirect Models Of Interfaces Between Structural mentioning

confidence: 99%

Overcoming the limitations of distinct element method for multiscale modeling of materials with multimodal internal structure

Shilko

Psakhie

Schmauder

et al. 2015

Computational Materials Science

108

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“…[1] Failure of the films by cleavage fracture is similar to previous studies of ceramic films on metal substrates pulled in tension. [17][18][19] With the periodic cracking method that is based on a shear lag analysis, [17,18,20,21] the maximum shear traction that is supported by the interface can be calculated. The periodic cracking method was first developed to study the shear properties of metal-ceramic interfaces, [17] with similar periodic cracking of other material systems having also been studied.…”

Section: Introductionmentioning

confidence: 99%

Fracture and Delamination of Chromium Thin Films on Polymer Substrates

Cordill

Taylor

Schalko

et al. 2009

Metall Mater Trans A

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New emerging technologies in the field of flexible electronic devices require that metal films adhere well and flex with polymer substrates. Common thin film materials used for these applications include copper (Cu) with an adhesion interlayer of chromium (Cr). Copper can be quite ductile and easily move with the polymer substrate. However, Cr is more brittle and fractures at lower strains than Cu. This study aims to examine the fracture and subsequent buckling and delamination of strained Cr films on polyimide (PI). In-situ scanning electron microscope (SEM) straining is used to systematically study the influence of film thickness on fracture and buckling strains. Film fracture and delamination depend on film thickness, and increases in crack and buckle density with decreasing thickness are explored by a shear lag model.

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“…7b ), which is also slightly different from the value (0.286 nm) in the stoichiometric MA. These are understandable, as the structure and the energetics of the spinels permit them to tolerate a wide range of cation compositions 37 38 39 . At high temperature MA can form a wide range of solid solutions with excessive magnesia or alumina, i.e., MgO· n Al 2 O 3 [ n = 0.8(MgO rich)-3.5(Al 2 O 3 rich)] 40 .…”

Section: Resultsmentioning

confidence: 99%

Novel calcium hexaluminate/spinel-alumina composites with graded microstructures and mechanical properties

Shuai

Huang

et al. 2014

Sci Rep

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Calcium hexaluminate (CA6) was incorporated into the matrix of magnesio aluminate spinel-alumina (MA-A) via infiltration of a porous preform fabricated from α-Al2O3 and MgO powders with a saturated calcium acetate solution and subsequent firing, forming CA6/(MA-A) functionally composites with graded fracture toughness. Actually, the porous preform was partially and perpendicularly immersed (1/4 of its length) in the solution. Owing to the capillary action, the calcium acetate solution was absorbed into the porous preform, and the different absorption distance led to the graded solution concentration in the height direction of the porous preform. The in-situ formation of CA6 conferred graded microstructures, as well as improved mechanical properties on the resultant composites. The CA6 content decreased gradually along the solution absorption direction, i.e., from one end [CA6/(MA-A) region] immersed in solution to the other end [MA-A region], reducing evidently the formation of layered structure along the direction, while increasing gradually the formation of spherical alumina particles. The CA6/(MA-A) region had a better toughness that could prevent the crack propagation and improve the spalling resistance. Meanwhile, the MA-A region could provide structural support, because of the higher Vickers hardness and density.

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Shear strength and sliding at a metal–ceramic (aluminum–spinel) interface at ambient and elevated temperatures

Cited by 20 publications

References 15 publications

Overcoming the limitations of distinct element method for multiscale modeling of materials with multimodal internal structure

Overcoming the limitations of distinct element method for multiscale modeling of materials with multimodal internal structure

Fracture and Delamination of Chromium Thin Films on Polymer Substrates

Novel calcium hexaluminate/spinel-alumina composites with graded microstructures and mechanical properties

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