Werkstoffkunde

Bargel, Hans-Jürgen; Cardinal, Peter; Hilbrans, Hermann; Hübner, Karl-Heinz; Schulze, Günter; Wurzel, Georg

doi:10.1007/978-3-662-10905-2

Cited by 19 publications

(6 citation statements)

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“…According to the theory of nucleation and crystal growth, a faster grain growth requires more nuclei growing at the same time leading to a more small-grained microstructure. 29,30 Inverse pole figures obtained by EBSD for self-annealed Cu films revealed a preferred (111) orientation. The strength of the (111) texture is comparable for b-Ta and TaN-based metallizations but is three times stronger for the TaSiNbased system.…”

Section: Resultsmentioning

confidence: 96%

Influence of Ta-based Diffusion Barriers on the Microstructure of Copper Thin Films

Stangl

Fletcher

Acker

et al. 2007

Journal of Elec Materi

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Copper represents the most commonly used interconnect material in ultra large-scale integration (ULSI) technology. Given that the successful implementation of Cu requires the use of underlying diffusion barriers, these studies were focused on the influence of Ta-based barrier layers on the microstructure of physical vapor deposited (PVD) and electrochemically deposited (ECD) Cu thin films. The variation of a-Ta, b-Ta, TaSiN, and TaN as an underlayer caused a modification of the PVD Cu seed-layer texture, which also affected the microstructure of Cu electroplated on top of the seed layer, both before and after recrystallization at room temperature.

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Section: Resultsmentioning

confidence: 96%

Influence of Ta-based Diffusion Barriers on the Microstructure of Copper Thin Films

Stangl

Fletcher

Acker

et al. 2007

Journal of Elec Materi

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“…In this study we present the first fracture resistance curves for enamel derived from fracture mechanical testing and evaluation of SENB samples and show that enamel exhibits rising fracture resistance behaviour. Macroscopically, shear fracture occurred [29] with fracture surfaces at 45°to acting tensile stresses independent of sample orientation. On the microstructural level, one could observe that stable crack propagation predominantly occurred within the protein-rich sheaths that envelop enamel rods and separate them from adjacent rods and interrod regions.…”

Section: Discussionmentioning

confidence: 99%

The fracture behaviour of dental enamel

et al. 2010

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Enamel is the hardest tissue in the human body covering the crowns of teeth. Whereas the underlying dental material dentin is very well characterized in terms of mechanical and fracture properties, available data for enamel are quite limited and are apart from the most recent investigation mainly based on indentation studies. Within the current study, stable crack-growth experiments in bovine enamel have been performed, to measure fracture resistance curves for enamel. Single edge notched bending specimens (SENB) prepared out of bovine incisors were tested in 3-point bending and subsequently analysed using optical and environmental scanning electron microscopy. Cracks propagated primarily within the protein-rich rod sheaths and crack propagation occurred under an inclined angle to initial notch direction not only due to enamel rod and hydroxyapatite crystallite orientation but potentially also due to protein shearing. Determined mode I fracture resistance curves ranged from 0.8-1.5 MPa*m(1/2) at the beginning of crack propagation up to 4.4 MPa*m(1/2) at 500 microm crack extension; corresponding mode II values ranged from 0.3 to 1.5 MPa*m(1/2).

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“…Fig. 2 shows an overview of the microstructural processes expected to occur during the extrusion of aluminum including cooling and/or heat treatment [1,2].…”

Section: Materials Modelingmentioning

confidence: 99%

Application of Adaptive Mesh and ALE Method in Simulation of Extrusion of Aluminum Alloys

Kayser

Parvizian

Hortig

et al. 2008

KEM

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The purpose of this work is the modeling and simulation of the material behavior of aluminum alloys during extrusion processes. In particular, attention is focused here on aluminum alloys of the 6000 series (Al-Mg-Si) and 7000 series (Al-Zn-Mg). The material behavior of these alloys during extrusion is governed mainly by dynamic recovery and static recrystallization during cooling. The current material model is based on the role of energy stored in the material during deformation, as it acts as the driving force for microstructural development. The concept of internal variables is used to describe state quantities such as dislocation density, average grain size and average grain orientation. The focus of the current paper is on some of the numerical aspects of the extrusion process simulation such as contact problems and adaptive mesh refinement which should be considered in order to obtain more accurate and robust results.

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Werkstoffkunde

Cited by 19 publications

References 0 publications

Influence of Ta-based Diffusion Barriers on the Microstructure of Copper Thin Films

Influence of Ta-based Diffusion Barriers on the Microstructure of Copper Thin Films

The fracture behaviour of dental enamel

Application of Adaptive Mesh and ALE Method in Simulation of Extrusion of Aluminum Alloys

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