Using a novel microstructure generator to calculate macroscopic properties of multi-phase non-oxide ceramics in comparison to experiments

Winkler, Dag; Staab, T.E.M.; Müller, Th.; Raether, F.

doi:10.1016/j.ceramint.2015.08.114

Cited by 12 publications

(5 citation statements)

References 32 publications

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“…As shown in Ref. , our simulation of elastic properties show a good agreement with measurements. According to Watari et al , we assume that deviations in the thermal conductivity of Si

_{3}

_{4}

‐YA ceramics are due to oxygen impurities and aluminum diffusion into the

β

‐Si

_{3}

_{4}

‐grains (primary phase), originating from the sintering additives (Y

_{2}

_{3}

, Al

_{2}

_{3}

), necessary for the liquid‐phase sintering.…”

Section: Experimentals and Simulation Toolssupporting

confidence: 88%

“…All error bars given in this and the following figures were estimated from the standard deviation of five similar, but independently generated microstructures, and from systematic errors of the material properties used as input parameters (compare Ref. ).…”

Section: Resultsmentioning

confidence: 99%

“…While several research groups focus on three‐dimensional (3D) modeling of multi‐phase materials, only a few calculate thermal or mechanical properties of these materials as well . To the knowledge of the authors, only one group recently published simulations of microstructure property correlations of silicon nitride: Wippler et al.…”

Section: Introductionmentioning

confidence: 99%

“…Based on these microstructures one can estimate thermal, elastic, or electric properties by finite‐element (FE) simulations . This method was recently validated with different ceramic materials .…”

Section: Introductionmentioning

confidence: 99%

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The influence of sintering additives on the microstructure and material properties of silicon nitride ceramics investigated by advanced simulation tools

Brockmann

Staab

Raether

2017

Physica Status Solidi (a)

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In multi‐phase bulk ceramics, the separate influence of individual phases on the overall macroscopic properties can often hardly be studied by purely experimental observations. However, once a realistic microstructure model exists, computer simulations allow for that by varying the properties of individual phases and, thus, for studying their role independently. In the present article, the microstructure of liquid phase sintered silicon nitride ceramics was created using a voxel‐based structure generator. These generated microstructures have been meshed with a special tool so that thermal conductivities and elastic properties of these ceramics could be calculated using standard finite element simulations. Variations of the properties of individual phases were considered in a realistic range for the experimental optimization of silicon nitride ceramics and, therefore, their respective influence on macroscopic properties could be studied. It turns out that a high volume fraction of the primary β‐Si3N4 ‐phase has the largest positive impact on both stiffness and thermal conductivity, whereas the effect of grain shape and anisotropic material properties of the β‐Si3N4 ‐grains is rather low. However, the thermal conductivity of the secondary phase plays a significant role in the overall thermal conductivity, provided that it drops beyond 10 W m·K−1. Nevertheless, experimentally the thermal conductivity of silicon nitride ceramics is dominated by the thermal conductivity of the β‐Si3N4 ‐grains, where the latter is controlled by impurities which can be incorporated into the silicon nitride lattice during sintering. Thus, inverse simulation can be used as a powerful tool to investigate individual phase properties in multiphase ceramics, for example, estimating a decreased thermal conductivity of the primary phase (β‐Si3N4 ‐grains).

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“…As shown in Ref. , our simulation of elastic properties show a good agreement with measurements. According to Watari et al , we assume that deviations in the thermal conductivity of Si

_{3}

_{4}

‐YA ceramics are due to oxygen impurities and aluminum diffusion into the

β

‐Si

_{3}

_{4}

‐grains (primary phase), originating from the sintering additives (Y

_{2}

_{3}

, Al

_{2}

_{3}

), necessary for the liquid‐phase sintering.…”

Section: Experimentals and Simulation Toolssupporting

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The influence of sintering additives on the microstructure and material properties of silicon nitride ceramics investigated by advanced simulation tools

Brockmann

Staab

Raether

2017

Physica Status Solidi (a)

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show abstract

“…8 The material property of single-phase material can be determined directly by measurement or the first principle of simulation. 9 The multi-phase material can be altered as per the application's requirement. These materials are generally subjected to extreme loading conditions during service.…”

Section: Introductionmentioning

confidence: 99%

Mesoscale modeling and biocompatibility of nano-hydroxyapatite reinforced ultra-high molecular weight polyethylene composite

Verma

Keshri

Pathak

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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This work aims to implement an efficient and accurate computational model to predict elastoplastic properties of UHMWPE/nano-HA bio-composite. Mean-field (MF) homogenization and finite element (FE) techniques are implemented to predict the elastoplastic behavior of composite. The predicted results obtained by MF and FE were compared and validated experimentally by fabricating the specimen using microwave-assisted compression molding. The axial and transverse moduli were increased by 49% at a 20% weight fraction of nano-HA. The hardening modulus was also found to be increased by 67%. Further, Degree of crystallinity (Xc) of fabricated composite specimens was determined using differential scanning calorimetry analysis. It was found that the Xc increased 34% with the addition of 20% weight fraction of nano-HA. In vitro, direct contact cytotoxicity and antibacterial test were performed to determine cell adhesion and bacterial behavior of the composite.

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Modelling of multilayer actuator layers by homogenisation technique using Digimat software

Trzepieciński

Ryzińska

Biglar

et al. 2017

Ceramics International

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Using a novel microstructure generator to calculate macroscopic properties of multi-phase non-oxide ceramics in comparison to experiments

Cited by 12 publications

References 32 publications

The influence of sintering additives on the microstructure and material properties of silicon nitride ceramics investigated by advanced simulation tools

The influence of sintering additives on the microstructure and material properties of silicon nitride ceramics investigated by advanced simulation tools

Mesoscale modeling and biocompatibility of nano-hydroxyapatite reinforced ultra-high molecular weight polyethylene composite

Modelling of multilayer actuator layers by homogenisation technique using Digimat software

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