Improved fracture behavior and mechanical properties of alumina textured ceramics

Chang, Yunfei; Bermejo, Raúl; Jiang, Guicheng; Sun, Yuan; Wu, Jie; Yang, Bin; Cao, Wenwu

doi:10.1016/j.matlet.2018.03.123

Cited by 21 publications

(8 citation statements)

References 17 publications

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“…Alumina (Al 2 O 3 ) is a ceramic material that possesses high values of hardness, strength and wear resistance, as well as chemical stability [ 1 , 2 , 3 , 4 ]. Therefore, it may be applied as an advanced material in electronics, metallurgy, catalysis, wear protection, refractories, as a composite, etc.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Alumina Ceramics Corrosion Resistance in Nitric Acid

Ropuš¹,

Ćurković

Cajner

et al. 2022

Materials

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The development of ceramic materials resistance in various aggressive media combined with required mechanical properties is of considerable importance for enabling the wider application of ceramics. The corrosion resistance of ceramic materials depends on their purity and microstructure, the kind of aggressive media used, and the ambient temperature. Therefore, the corrosion resistance of alumina ceramics in aqueous HNO3 solutions of concentrations of 0.50 mol dm−3, 1.25 mol dm−3, and 2.00 mol dm−3 and different exposure times—up to 10 days—have been studied. The influence of temperature (25, 40, and 55 °C) was also monitored. The evaluation of Al2O3 ceramics corrosion resistance was based on the concentration measurements of eluted Al3+, Ca2+, Fe3+, Mg2+, Na+, and Si4+ ions obtained by inductively coupled plasma atomic emission spectrometry (ICP-AES), as well as density measurements of the investigated alumina ceramics. The response surface methodology (RSM) was used for the optimization of parameters within the experimental “sample-corrosive media” area. The exposure of alumina ceramics to aqueous HNO3 solutions was conducted according to the Box–Behnken design. After the regression functions were defined, conditions to achieve the maximum corrosion resistance of the sintered ceramics were determined by optimization within the experimental area.

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Section: Introductionmentioning

confidence: 99%

Optimization of Alumina Ceramics Corrosion Resistance in Nitric Acid

Ropuš¹,

Ćurković

Cajner

et al. 2022

Materials

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“…[ 65 ] For brittle materials such as ceramics, where the linear–elastic fracture mechanics approach can be applied to describe both matrix and IL material, this energy‐based method has be used successfully. [ 65,66 ] When a crack encounters an interface between two dissimilar materials, it will either pass through the interface or deflect into the interface if the mismatch between mechanical properties (fracture and elastic properties) satisfies a particular condition. [ 65,67 ] As a linear–elastic model is not adequate to describe the material behavior for the TPC IL and the properties of most polymers change significantly with time and temperature, this criterion for describing crack propagation requires significant adaptations and further work to possibly apply this energy‐based method to polymers.…”

Section: Resultsmentioning

confidence: 99%

Multimaterial Extrusion‐Based Additive Manufacturing of Compliant Crack Arrester: Influence of Interlayer Length, Thickness, and Applied Strain Rate

2022

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Additive manufacturing is a useful tool for fabricating complex multimaterial structures. Compliant interlayers (ILs) can easily be introduced into stiff materials to increase toughness and stop or impede crack growth, as is done in nature. The aim herein is to analyze the influence of varying IL lengths and thicknesses on crack propagation in 3D‐printed polymers at different loading rates. A glycol‐modified poly(ethylene terephthalate) is used as a matrix material, while a thermoplastic elastomer on a copolyester basis serves as an compliant IL. Specimen fabrication is done with a fused filament fabrication 3D printer equipped with a multimaterial unit, which allows to print a component composed of several materials within one print. Additively manufactured Charpy samples are tested in three‐point bending at loading rates between 0.1 mm min−1 and 3.8 m s−1. The thickness of the IL almost shows no effect on energy absorption as long as remaining in the same printing orientation and loading rate. For varying IL lengths, a constant fight between crack penetration and crack deflection occurs. At low loading rates, the IL acts as a defect. As the loading rate increases, the total absorbed energy of composites increases compared with the pure matrix material.

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“…Because of its high mechanical, thermal, and chemical stability porous α -alumina ceramics have been used in different areas such as catalyst support, membrane, electrode and thermal insulator. [3][4][5]. The void volume in a compact solids with widths smaller than 2 nm, between 2-50 nm and larger than 50 nm are called micropore, mesopore, and macropore, respectively [6,7].…”

Section: Introductionmentioning

confidence: 99%

Isothermal compressibility and isobaric thermal shrinkage of a porousα-alumina compact: thermodynamic calculations

2020

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Two methods were proposed to calculate the thermodynamic parameters of porous ceramic compacts depending on their molar volume change with applied pressure and heating temperature, respectively. Molar volume of the porous α-alumina (α-Al 2 O 3 ) compact was evaluated according to literature depending on both the applied pressure at room temperature and the heating temperature at atmospheric pressure. The isothermal compressibility coefficient, Gibbs energy, and work done on the compact by compression were calculated. The thermal shrinkage coefficient and activation energy as well as the change in enthalpy, entropy and Gibbs energy were calculated for partial sintering. The spontaneous nature of the treatments were discussed with respect to the obtained results.

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Improved fracture behavior and mechanical properties of alumina textured ceramics

Cited by 21 publications

References 17 publications

Optimization of Alumina Ceramics Corrosion Resistance in Nitric Acid

Optimization of Alumina Ceramics Corrosion Resistance in Nitric Acid

Multimaterial Extrusion‐Based Additive Manufacturing of Compliant Crack Arrester: Influence of Interlayer Length, Thickness, and Applied Strain Rate

Isothermal compressibility and isobaric thermal shrinkage of a porousα-alumina compact: thermodynamic calculations

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