Dense SiC containing strongly aligned plate-like grains by magnetic treatment

Lee, S.H.; Li, Feng; Yin, Jie; Lee, J.S.; Zhu, Xiaofang; Suzuki, Tohru; Sakka, Yoshio; Tanaka, Hidehiko

doi:10.1016/j.ceramint.2014.12.078

Cited by 13 publications

(11 citation statements)

References 19 publications

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“…This phenomenon, however, depends on the sintering method and the formulation. For example, SiC textured ceramics prepared by conventional sintering exhibit a higher crack deflection and tortuosity when the sample is loaded parallel to the orientation (Figure 7H) [82]. In these samples, there was no glassy interfacial layer between the grains, that would have provided the interfacial strength necessary to deflect a crack at a ~80-90 degree angle [124].…”

Section: 1| Structural Propertiesmentioning

confidence: 99%

Magnetic slip casting for dense and textured ceramics: A review of current achievements and issues

Ferrand

2021

Journal of the European Ceramic Society

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Ceramic materials are ubiquitous in technologies operating under high mechanical, thermal or chemical constrains. Research in ceramic processing aims at creating ceramics with properties that are still challenging to obtain, such as toughness, transparency, conductivity, among others. Magnetic slip casting is a ceramic process where an external magnetic field is used to align the ceramic grains along preferential crystallographic directions, thereby creating controlled texture. Over the past 20 years of research on magnetic slip casting, ceramics of multiple chemistry were found to exhibit enhanced properties as a result from the texturation. This paper reviews the progress in the field of magnetic slip casting, details the processing parameters, the textures obtained for a diverse range of ceramic materials. The achieved mechanical and functional properties of the magnetically textured parts are presented. This overview of the magnetic slip casting process allows to identify critical directions for future advancement in advanced technical ceramics.

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Section: 1| Structural Propertiesmentioning

confidence: 99%

Magnetic slip casting for dense and textured ceramics: A review of current achievements and issues

Ferrand

2021

Journal of the European Ceramic Society

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“…Strong magnetic fields (≈ 9-18 T) have been used along with a slip casting process to finely control and texture anisotropic ceramic particlesto improve their physical, chemical and mechanical properties [7][8][9][10][11][12][13][14][15]. Particles in a slurry with weak anisotropic magnetic susceptibility can rotate within a strong magnetic field to an angle that minimizes the system energy.…”

Section: Introductionmentioning

confidence: 99%

Stiff, porous scaffolds from magnetized alumina particles aligned by magnetic freeze casting

Frank

Naleway

Haroush

et al. 2017

Materials Science and Engineering: C

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Bone consists of a hard mineral phase and a compliant biopolymer phase resulting in a composite material that is both lightweight and strong. Osteoporosis that degrades spongy bone preferentially over time leads to bone brittleness in the elderly. A porous ceramic material that can mimic spongy bone for a one-time implant provides a potential solution for the future needs of an aging population. Scaffolds made by magnetic freeze casting resemble the aligned porosity of spongy bone. A magnetic field applied throughout freezing induces particle chaining and alignment of lamellae structures between growing ice crystals. After freeze drying to extract the ice and sintering to strengthen the scaffold, cubes from the scaffold center are mechanically compressed along longitudinal (z-axis, ice growth direction) and transverse (y-axis, magnetic field direction) axes. The best alignment of lamellar walls in the scaffold center occurs when applying magnetic freeze casting with the largest particles (350nm) at an intermediate magnetic field strength (75mT), which also agrees with stiffness enhancement results in both z and y-axes. Magnetic moments of different sized magnetized alumina particles help determine the ideal magnetic field strength needed to induce alignment in the scaffold center rather than just at the poles.

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“…What is more, its polymerization time can be controlled by adjusting the amount of initiator and catalyst and the gelled green body has high strength so that the cost of machining is low [13][14][15][16]. Our preliminary research showed that the degree of texture could reach to 0.84 in SiC ceramics prepared in a low magnetic field of 6 T compared with other textured SiC prepared in 10 T or 12 T [8][9][10]17]. These results offer the further possibility to obtain a higher degree of texture in SiC ceramic by optimizing the preparation conditions.…”

Section: Introductionmentioning

confidence: 76%

“…When the particle with magnetic anisotropy in the suspension is placed in the magnetic field, it will be rotated to an angle minimizing the system energy by a magnetic torque generated from the interaction between the magnetic anisotropy and the applied magnetic field [5][6][7]. Previous studies show that highly textured SiC ceramics can be fabricated by slip-casting in a strong magnetic field of 12 T and subsequent sintering without the magnetic field [8][9][10]. However, there still exists a difficulty in the fabrication of a strong magnetic field (12 T) and the cost is very high for production or experiments.…”

Section: Introductionmentioning

confidence: 99%

Effect of sintering aids on microstructure and properties of textured SiC ceramics prepared in 6 T

Yang

Zhu

Zhao

et al. 2020

Journal of Asian Ceramic Societies

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C-axis textured α-SiC ceramics were prepared by gel-casting in a strong magnetic field of 6 T and subsequent sintering at 1950 °C for 2 h. The effects of sintering aids on the microstructure and properties of textured SiC ceramics were discussed. Results showed that highly textured α-SiC green bodies were obtained by gel-casting in a strong magnetic field of 6 T. The sintering process slightly suppressed the texture development of α-SiC ceramic. The degree of texture in the α-SiC green bodies and sintered bodies both showed a decreasing trend with the increase of sintering aids content. And the increase of the sintering aids content promoted the densification and improved the bending strength of α-SiC ceramics. Besides, the bending strength of textured SiC ceramics showed an anisotropy based on the grain orientation.

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Dense SiC containing strongly aligned plate-like grains by magnetic treatment

Cited by 13 publications

References 19 publications

Magnetic slip casting for dense and textured ceramics: A review of current achievements and issues

Magnetic slip casting for dense and textured ceramics: A review of current achievements and issues

Stiff, porous scaffolds from magnetized alumina particles aligned by magnetic freeze casting

Effect of sintering aids on microstructure and properties of textured SiC ceramics prepared in 6 T

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