Modeling the mechanical properties of optimally processed cordierite–mullite–alumina ceramic foams by X-ray computed tomography and finite element analysis

Zhang, Lingfei; Ferreira, J.M.F.; Olhero, Susana M.; Courtois, Loïc; Zhang, Tao; Maire, Éric; Rauhe, Jens Chr. M.

doi:10.1016/j.actamat.2012.04.025

Cited by 32 publications

(21 citation statements)

References 32 publications

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“…[17] Based on the reconstructed tomographic images, finite element (FE) method allows to generate numerical models of the mechanical properties of porous ceramics. [18][19][20] The aim of this preliminary study was to compare the real mechanical behavior of the ceramic and glass foams and to present the impact of the carbon on the failure mechanism.…”

Section: Introductionmentioning

confidence: 99%

Comparative Phenomenological Study of Fracture Behavior of Ceramic and Glass Foams under Compressive Stress Using In Situ X‐Ray Microtomography

et al. 2017

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This contribution is dealing with the phenomenological characterization of the cracking and damage of two different brittle foam materials (ceramic foams and glass foams) under compressive load. The compression tests were performed in situ in X-ray microtomograph in order to visualize the formation of single crack and crack patterns in 3D. Successive microtomographic scans at different levels of compression strain provide an insight into the stressed microstructure of the ceramic and glass foams. The linked evaluation of the microtomographic scans and registered load-displacement curves clarify the different mechanical response of ceramic and glass foams. Both, ceramic and glass foams show in the early stages of load nearly elastic response. The compressive loading above the elastic region induces different behavior. Ceramic foams response with local failure of single struts and edges to increasing loading. In case of glass foams, the response is depending on whether the cells are predominantly open or close. Predominantly open cell glass foams features very brittle behavior whereas close cell glass foams show pseudo-ductile behavior with a formation of a crushing band transversal to the loading direction.

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Section: Introductionmentioning

confidence: 99%

Comparative Phenomenological Study of Fracture Behavior of Ceramic and Glass Foams under Compressive Stress Using In Situ X‐Ray Microtomography

et al. 2017

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“…The usually large size of X-ray tomography image stacks, of order 1000 3 voxels, makes it difficult to use all of the measured microstructure because of limited computer power [12,15,17,19,20,23]. For random porous materials, which are non-periodic, defining a surface for imposing any kind of boundary conditions can be difficult [14,16,23].…”

Section: Introductionmentioning

confidence: 99%

“…The procedure is as follows: measure a three-dimensional (3D) volume of the porous microstructure, mesh the image in some manner [10,11], and then, with a choice of elastic moduli for the solid backbone phase, directly compute the elastic moduli using a finite element scheme [12][13][14]. This procedure has been followed many times in recent years, for a wide variety of porous materials, including alumina, aluminum, bone, ceramics, cellular concrete, food materials such as bread, and industrial process materials such as coke in steel making and thermally sprayed ceramic coatings [11,[14][15][16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

X-ray CT imaging and finite element computations of the elastic properties of a rigid organic foam compared to experimental measurements: insights into foam variability

et al. 2015

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A combined computational/experimental technique was developed to analyze the compressive elastic properties of a rigid organic foam. This technique combines X-ray computed tomography, image analysis, and large-scale finite element computations utilizing a new numerical technique. Predictions of Young's modulus were validated with uniaxial compression testing. Good agreement was obtained between imaging/finite element computations and experimental mechanical measurements within experimental error, and the limited knowledge existing on the solid material comprising the backbone of the foam. Using the new combined experimental/theoretical procedures, it was found that the predicted Young's modulus of the solid backbone differed by more than a factor of 100 % between two different grades of the foam, in accordance with the findings of other researchers. A significant variability of the backbone modulus was also found within the same grade. Density measurements identified the variability between different grades of foam and different as-received sample thicknesses within the same grade of foam.

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“…However, the hollow struts with triangular voids and longitudinal cracks will generate after removal of polymeric template at elevated temperature . These flaws weaken the structural properties of RPCs, especially the strut defects reduce the strength of porous material, whose mechanical properties are usually lower than the theoretical strength predicted for open cell structures . Therefore, several methods have been developed to improve the strength of RPCs.…”

Section: Introductionmentioning

confidence: 99%

“…9 These flaws weaken the structural properties of RPCs, especially the strut defects reduce the strength of porous material, whose mechanical properties are usually lower than the theoretical strength predicted for open cell structures. 10,11 Therefore, several methods have been developed to improve the strength of RPCs. In general, pretreatment of polymeric sponge by acid/alkali or polycarbosilane were used to increase surface roughness and wetting ability of sponge, the modified sponge was benefit to thicken the ceramic skeleton.…”

Section: Introductionmentioning

confidence: 99%

Enhanced mechanical properties of SiC reticulated porous ceramics via adjustment of residual stress within the strut

Liang

Sang

et al. 2017

Int J Applied Ceramic Tech

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Silicon carbide reticulated porous ceramics (SiC RPCs) with multi-layered struts were fabricated by polymer replica technique with SiC slurry, followed by infiltrating alumina slurries containing andalusite under vacuum condition. The effects of andalusite addition on the microstructure and mechanical properties of SiC RPCs were investigated, also the residual stress within the multi-layered strut was predicted. Theoretical calculations showed that the residual tensile stress generated in the outer layer of SiC RPCs because of its larger thermal expansion coefficient of infiltration slurry than that of SiC slurry at elevated temperature. Furthermore, the addition of andalusite reduced the thermal expansion coefficient and Young's modulus of infiltration slurries, thereby significantly reducing the residual stress of the outer layer in multi-layered struts. The reduced residual tensile stress within the outer layer was beneficial to eliminate surface cracks on the struts, thus improving the mechanical properties and thermal shock resistance of SiC RPCs. K E Y W O R D Smechanical properties, multi-layered struts, residual stress, SiC reticulated porous ceramics

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Modeling the mechanical properties of optimally processed cordierite–mullite–alumina ceramic foams by X-ray computed tomography and finite element analysis

Cited by 32 publications

References 32 publications

Comparative Phenomenological Study of Fracture Behavior of Ceramic and Glass Foams under Compressive Stress Using In Situ X‐Ray Microtomography

Comparative Phenomenological Study of Fracture Behavior of Ceramic and Glass Foams under Compressive Stress Using In Situ X‐Ray Microtomography

X-ray CT imaging and finite element computations of the elastic properties of a rigid organic foam compared to experimental measurements: insights into foam variability

Enhanced mechanical properties of SiC reticulated porous ceramics via adjustment of residual stress within the strut

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