Effect of additives on slip casting rheology, microstructure and mechanical properties of Si3N4/SiC composites

Shahrestani, Shohreh; Ismail, Mokhtar Che; Kakooei, Saeid; Beheshti, Mohammadali

doi:10.1016/j.ceramint.2019.11.085

Cited by 14 publications

(7 citation statements)

References 12 publications

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“…Generally, the slip casting process is a colloidal and cost-effective method to fabricate the engineering ceramics, composites and FGMs in aqueous suspension by using the porous mould and draining water from the slurry of a green body ready for the sintering process [142][143][144][145][146][147][148]. In this process, in order to fabricate the products with high performance and density, the most significant concern factors such as particle size, distribution of particles, particle shape and morphology, volumetric solids content, inter-particle force, pH values and slurry stabilization using desirable type and amount of dispersant must be controlled and optimized [149][150][151][152].…”

Section: Slip Casting Processmentioning

confidence: 99%

Functionally graded materials (FGMs): A review of classifications, fabrication methods and their applications

Mohammadi

Rajabi

Ghadiri

2021

PAC

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Functionally graded materials (FGMs) are new materials whose properties change gradually in respect to their dimensions. This group of materials shows a tremendous improvement of previously used composite materials. FGM consists of two or more materials whose combination enables the achievement of specified properties in accordance with the desired application. The article gives an overview of different classifications, various fabrication methods and applications of the FGMs. It could also provide insight and perspective for researchers, university students and research and development teams since it has brought together diverse aspects of FGMs. As mentioned in section two, we took all FGMs fabrication methods under consideration, giving the reader an insight into how to make a product while satisfying the conditions of financial and mechanical efficiency. The classification section specifically goes over structures, types of gradients, sizes/scales, state of matter and finishes with the manufacturing processes. Section two deep dives into the fabrication methods used in the FGMs, which are divided into three sub-sections, including gas-based, liquid-based and solid-based. Lastly, various applications of the FGMs in different fields and industries, namely aerospace, energy, medicine, military, manufacturing and eventually other applications, are demonstrated.

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Section: Slip Casting Processmentioning

confidence: 99%

Functionally graded materials (FGMs): A review of classifications, fabrication methods and their applications

Mohammadi

Rajabi

Ghadiri

2021

PAC

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“…Its total porosity was 75.99%, and the compressive strength was 11.07 MPa. Shahrestani et al 23 prepared SiC/Si 3 N 4 compos-…”

Section: Introductionmentioning

confidence: 99%

“…Its total porosity was 75.99%, and the compressive strength was 11.07 MPa. Shahrestani et al 23 . prepared SiC/Si 3 N 4 composites with a strength of 66.37 MPa by using Si/SiC powder by slip casting method.…”

Section: Introductionmentioning

confidence: 99%

Influences of solid content of slurry on the microstructure of CaO crucible prepared by slip casting

Deng

Wei

Zhou

et al. 2023

Int J Applied Ceramic Tech

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CaO crucible was prepared from Ca(OH) 2 slurry via a slip-casting method in order to avoid hydration problem caused by free CaO during preparation process. The effect of solid content of Ca(OH) 2 slurry on microstructure of CaO crucible was investigated. It was found that the rheological property of the slurry was significantly improved when the solid content of the slurry within a certain range. The change of solid content of slurry affects the microstructure of the final products. When the solid content of the slurry was 71 wt%, the manufactured CaO crucible was of smallest mean pore size (2.58 μm) after 1600 • C heating treatment.The heated CaO sample was of lower apparent porosity (4.1%) and higher bulk density (2.93 g/cm 3 ). And the size distributions of most CaO grains are between 10 and 40 μm.

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“…It is an important prerequisite for the slurry to maintain good and stable rheological properties when using tape casting technology to prepare GOS phosphor screens. Solvents and various additives, including dispersants, binders and plasticizers, are the main factors affecting the rheological properties of the slurry [14][15][16][17][18][19][20][21] . The solvent should not only be able to uniformly disperse the powders and other additives, but also have no adverse effect on the powders.…”

Section: Introductionmentioning

confidence: 99%

Study on the influence of different additives on the rheological properties of gadolinium oxysulfide slurry prepared for tape casting

Zhang

Kou²,

Guo³

et al. 2023

International Conference on Optoelectronic Materials and Devices (ICOMD 2022)

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Gadolinium oxysulfide (Gd2O2S, GOS) doped with rare earth elements was often used as imaging materials for X-Ray imaging equipment because of its excellent properties of absorbing incident X-rays and converting them into visible light. The flat-panel detector based on the GOS phosphor screen is the core imaging component of the digital radiography. In this paper, GOS slurry was prepared to form phosphor screen by tape casting, and the influence of slurry solvents and different additives on the rheological properties of the slurry was systematically studied. Based on the results of rheological properties, the optimal solid content of the slurry and the optimal addition range of the additives, like dispersants, binders and plasticizers, were determined. The solid content of the slurry is 70%, and the best amount of dispersant is 0.5%~1% of the powder mass. The optimized dosage of binder is 4.5%~7% of the powder mass, and the best plasticizer content is 1.0~1.5 times of the binder content. Then, the GOS fluorescent layer with smooth and flat surface, uniform and controllable thickness, and good bonding ability, was successfully prepared by tape casting the optimized slurry.

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Effect of additives on slip casting rheology, microstructure and mechanical properties of Si3N4/SiC composites

Cited by 14 publications

References 12 publications

Functionally graded materials (FGMs): A review of classifications, fabrication methods and their applications

Functionally graded materials (FGMs): A review of classifications, fabrication methods and their applications

Influences of solid content of slurry on the microstructure of CaO crucible prepared by slip casting

Study on the influence of different additives on the rheological properties of gadolinium oxysulfide slurry prepared for tape casting

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