Multi-Scale Mechanical Behaviour of a Highly Porous Alumina Based Foam

Buncianu, Dorel; Tessier-Doyen, Nicolas; Absi, Joseph; Negru, Radu; Şerban, Dan Andrei; Marșavina, Liviu

doi:10.1007/s12540-019-00413-0

Cited by 7 publications

(4 citation statements)

References 31 publications

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“…Although the standard (i.e., ASTM C1424-15(2019), Standard Test Method for Monotonic Compressive Strength of Advanced Ceramics at Ambient Temperature) recommends cylindrical shape specimens with the length/diameter range from 1.5 to 2.5, we chose cubic specimens for the following technological reasons: (i) the sacrificial polyurethane foam is easier and more precisely cut in this shape compared to the cylindrical shape; (ii) the final ceramic scaffold is easy to be shaped in the desired form starting from cubic form using regular abrasive tools. It should be mentioned that similar specimens were successfully used for compression tests of highly porous alumina-based foam [ 28 ]. Biocompatibility or cytotoxicity can be verified using two different methods: (i) in vivo tests using human materials, which are too complex and require ethical approvals; (ii) in vitro testing on human or animal cell lines, which is the most common method and it was applied in the present study for the new material C. Biocompatibility was demonstrated in our previous study [ 25 ] for the two commercially available materials E and D. …”

Section: Methodsmentioning

confidence: 99%

“…Although the standard (i.e., ASTM C1424-15(2019), Standard Test Method for Monotonic Compressive Strength of Advanced Ceramics at Ambient Temperature) recommends cylindrical shape specimens with the length/diameter range from 1.5 to 2.5, we chose cubic specimens for the following technological reasons: (i) the sacrificial polyurethane foam is easier and more precisely cut in this shape compared to the cylindrical shape; (ii) the final ceramic scaffold is easy to be shaped in the desired form starting from cubic form using regular abrasive tools. It should be mentioned that similar specimens were successfully used for compression tests of highly porous alumina-based foam [28]. (6) Biocompatibility or cytotoxicity can be verified using two different methods: (i) in vivo tests using human materials, which are too complex and require ethical approvals;…”

Section: Characterization Of the Samplesmentioning

confidence: 99%

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Ceramic Scaffolds for Bone Augmentation: Design and Characterization with SEM and Confocal Microscopy

et al. 2022

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Bone scaffolds must fulfil numerous and sometimes contradictory characteristics: biocompatibility, bioactivity, high porosity, and appropriate mechanical strength. To tackle some of these issues, this study has several aims for the development of such scaffolds for dentistry applications: (i) to utilize appropriate materials (ceramics and sponges) and to introduce a novel, potentially performant ceramic material; (ii) to characterize the obtained scaffolds by using a range of methods; (iii) to compare and to correlate the assessment results with the scope to validate them reciprocally. There are two commercially available dental ceramics (i.e., Ceramco iC Natural Enamel (E) and Ceramco iC Natural Dentine (D), (DeguDent GmbH, Hanau-Wolfgang, Deutschland)) that are considered, as well as a new-developed porcelain (ceramic C). To obtain porous structures of scaffolds, each ceramic is introduced in two different sponges: a denser one, green (G) and a less dense one, blue (B). A total of 60 samples are manufactured and divided in six study groups, obtained by combining the above materials: GE, BE, GD, BD, GC, and BC (where the first letter represents the sponge type and the second one the utilized ceramic). Several methods are applied to characterize their chemical composition, as well as their macro- and micro-porosity: X-ray Diffraction (XRD), apparent porosity measurements, scanning electronic microscopy (SEM), and confocal microscopy (CM). The latter two methods image the inner (porous) and the outer/cortical (denser) areas of the samples. The results show a good porosity (i.e., dimensions and uniformity of pores) of around 65% for the final group BC, with satisfactory values of around 51% for BD and GC. A certain correlation is made between SEM, CM, and the apparent porosity results. The biocompatibility of the new ceramic C is demonstrated. Finally, a necessary trade-off is made with the mechanical strength of the obtained scaffolds, which was also evaluated. From this point of view, Group BD has the highest compressive strength of around 4 MPa, while Group BC comes second, with around 2 MPa. This trade-off between porosity and mechanical strength suggests a choice between Groups BC and BD, which are the best with regard to the porosity and mechanical strength criterium, respectively.

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Section: Methodsmentioning

confidence: 99%

“…Although the standard (i.e., ASTM C1424-15(2019), Standard Test Method for Monotonic Compressive Strength of Advanced Ceramics at Ambient Temperature) recommends cylindrical shape specimens with the length/diameter range from 1.5 to 2.5, we chose cubic specimens for the following technological reasons: (i) the sacrificial polyurethane foam is easier and more precisely cut in this shape compared to the cylindrical shape; (ii) the final ceramic scaffold is easy to be shaped in the desired form starting from cubic form using regular abrasive tools. It should be mentioned that similar specimens were successfully used for compression tests of highly porous alumina-based foam [28]. (6) Biocompatibility or cytotoxicity can be verified using two different methods: (i) in vivo tests using human materials, which are too complex and require ethical approvals;…”

Section: Characterization Of the Samplesmentioning

confidence: 99%

Ceramic Scaffolds for Bone Augmentation: Design and Characterization with SEM and Confocal Microscopy

et al. 2022

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“…Ceramic foams are widely used in engineering fields, and their pore size can be controlled, with the porosity of generally between 20%–95%. They are usually used as functional materials for filtration, separation, air distribution, heat insulation and bioceramics (Buncianu et al ., 2020; Hu et al ., 2014; He et al ., 2022; Sun and Liu, 2021). In addition, they may also be used for sound absorption (Sun and Liu, 2021; Duan et al ., 2012).…”

Section: Introductionmentioning

confidence: 99%

Sound absorption performance of composite structures from a kind of lightweight ceramic foam with perforated plate

Liu,

Song,

Sun

2023

MMMS

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PurposeThe purpose of this paper is mainly to know: (1) the sound absorption coefficient of porous composite structures constituted by a new kind of lightweight ceramic foam and perforated plate; (2) the availability of an equivalent porous material model, recently proposed by the present author, to these composite structures in sound absorption.Design/methodology/approachA kind of lightweight ceramic foam with bulk density of 0.38–0.56 g·cm-3 was produced by means of molding, drying and sintering. The effect of stainless steel perforated plate on sound absorption performance of the ceramic foam was investigated by means of JTZB absorption tester.FindingsThe results indicate that the sound absorption performance could be obviously changed by adding the stainless steel perforated plate in front of the porous samples and the air gap in back of the porous samples. Adding the perforated plate to the porous sample with a relatively large pore size, the sound absorption performance could be evidently improved for the composite structure. When the air gap is added to the composite structure, the first absorption peak shifts to the lower frequency, and the sound absorption coefficient could increase in the low frequency range.Originality/valueBased on the equivalent porous material model and the “perforated plate with air gap” model, the sound absorption performance of the composite structures can be simulated conveniently to a great extent by using Johnson-Champoux-Allard model.

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“…Ceramic foam is a new kind of porous material, which has attracted wide attention in recent years. Because of its low thermal conductivity, small bulk density, high hardness and good chemical stability, it may be widely applied to daily life and industrial engineering (Scheffler and Colombo, 2015;Liu et al, 2015a;Guo et al, 2012;Buncianu et al, 2020;SepulvedaPlunk and Dunand, 2015;Chen et al, 2019). It can be often used as the heat insulation material, gas distribution material, filtration and separation material, catalyst carrier material and sound absorption material (Hu et al, 2014;Lee and Cho, 2012;Guo et al, 2019;Huo et al, 2019;Fey et al, 2017;Rastogi et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Optimization of structural parameters for the sound absorption performance of a cellular ceramic foam

Sun

Liu

2021

MMMS

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PurposeThe purpose of this paper is to provide an optimization schedule of structural parameters for the sound absorption performance of a cellular ceramic foam in the sound frequency range of 200–4,000 Hz.Design/methodology/approachThe cellular ceramic foam with porosity of about 60–75% and the pore size of about 1–7 mm was successfully prepared by using natural zeolite powder as the main raw material. For this ceramic foam, the sound absorption performance was measured, and the absorption structure was optimized by some important structural parameters. With orthogonal experiment, optimization of structural parameters was found for absorption performance. By means of the range analysis method, the main factor is known to influence the performance of ceramic foam.FindingsThe present ceramic foam may have good absorption performance although at relatively low frequencies of 400–4,000 Hz while structural parameters of sample are appropriately combined. With orthogonal experiment, optimization of structural parameters for the absorption performance was found to be as follows: sample thickness, 25 mm; porosity, 73.5%; pore size, 4–5 mm and air gap depth, 20 mm. To influence the performance, sample thickness is the main factor, air gap depth is the second and both of pore size and porosity would have a relatively slight effect.Originality/valueThis paper presents a method to optimize the structural parameters of a cellular ceramic foam for sound absorption performance by means of orthogonal experiment.

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Multi-Scale Mechanical Behaviour of a Highly Porous Alumina Based Foam

Cited by 7 publications

References 31 publications

Ceramic Scaffolds for Bone Augmentation: Design and Characterization with SEM and Confocal Microscopy

Ceramic Scaffolds for Bone Augmentation: Design and Characterization with SEM and Confocal Microscopy

Sound absorption performance of composite structures from a kind of lightweight ceramic foam with perforated plate

Optimization of structural parameters for the sound absorption performance of a cellular ceramic foam

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