Gel casting of sialon ceramics based on water soluble epoxy resin

Liu, Gang; Attallah, Moataz M.; Loretto, M. H.; Herny, Emilie; Jiang, Yun; Button, T.W.

doi:10.1016/j.ceramint.2015.05.081

Cited by 12 publications

(10 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The density of the green bodies and sintered samples prepared with various process parameters was measured using Archimedes principle (Table 2). Based on our previous rheological study [10], a solid loading of 44.5 vol. % was selected as the highest possible solid loading, yielding a sufficiently low viscosity with a reasonable fluidity for slurry preparation.…”

Section: Resultsmentioning

confidence: 99%

“…To prepare the green body samples, ethylene glycol diglycidyl ether (EGDE, Nasage, Japan) was used as an epoxy resin, alongside ammonium polyacrylate (NH 4 PAA) dispersant (Allied Colloids, Bradford, UK), and bis(3-aminopro-pyl)amine (Sigma-Aldrich, Germany) as a hardener, for slurry preparation, following the approach developed in our previous study [10], and other reports in the literature [14].…”

Section: Materials and Slurry Preparationmentioning

confidence: 99%

“…The overall success of the process depends on several important factors including; a) the optimisation of the slurry formulation, as it is essential to use highly loaded ceramic slurries with a reasonably low viscosity to reduce the drying shrinkage, and thus minimise the buildup of stresses during drying and sintering, b) performing a sufficient de-airing step prior to casting to avoid any defects that can form due to the entrapment of air bubbles during casting, and c) using a mould with the appropriate material properties to create a flexible mould that can allow shrinkage to occur with a reduced build-up of stresses in the cast part during drying [9]. Despite these attributes, very few studies [10] investigated the optimisation of the gel formulation and the casting approach to manufacture complex structures in a netshape approach, while achieving the appropriate microstructure and mechanical properties after sintering.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Netshape centrifugal gel-casting of high-temperature sialon ceramics

Jamshidi

Liu

et al. 2018

Ceramics International

Self Cite

View full text Add to dashboard Cite

Gel-casting of ceramics is a promising technique that can be used to manufacture complex structures in a netshape approach, with the density and mechanical properties of the green and sintered structures being strongly influenced by the composition of the gel formulation and the casting approach. In this study, a parametric study was performed to assess the influence of the gel formulation (solid loading and resin content), the casting approach (centrifugal casting versus gravity casting), and the sintering treatment on the microstructural and mechanical properties development in gel-cast sialon ceramics. Optimum levels of solid loading and resin content were identified for the gel formulation. The study showed that a significant improvement in the high temperature flexural strength (~1.5-2 folds) can be achieved by employing a centrifugal gel-casting approach, due to the reduction of the porosity caused by the entrapped gas that gets entrapped during the standard casting process.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Materials and Slurry Preparationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Netshape centrifugal gel-casting of high-temperature sialon ceramics

Jamshidi

Liu

et al. 2018

Ceramics International

Self Cite

View full text Add to dashboard Cite

show abstract

“…The gel slip contained 42 vol.% of zirconia and 13 wt.% of phenolic resin. A high strength of green bodies can be achieved with water-soluble epoxy resins [177]. The solid phase content was increased to 48.9 vol.% without resorting to pH adjustment.…”

Section: Gel Castingmentioning

confidence: 99%

Methods Used for the Compaction and Molding of Ceramic Matrix Composites Reinforced with Carbon Nanotubes

Мешалкин

Belyakov

2020

Processes

View full text Add to dashboard Cite

Ceramic matrix composites reinforced with carbon nanotubes are becoming increasingly popular in industry due to their astonishing mechanical properties and taking into account the fact that advanced production technologies make carbon nanotubes increasingly affordable. In the present paper, the most convenient contemporary methods used for the compaction of molding masses composed of either technical ceramics or ceramic matrix composites reinforced with carbon nanotubes are surveyed. This stage that precedes debinding and sintering plays the key role in getting pore-free equal-density ceramics at the scale of mass production. The methods include: compaction in sealed and collector molds, cold isostatic and quasi-isostatic compaction; dynamic compaction methods, such as magnetic pulse, vibration, and ultrasonic compaction; extrusion, stamping, and injection; casting from aqueous and non-aqueous slips; tape and gel casting. Capabilities of mold-free approaches to produce precisely shaped ceramic bodies are also critically analyzed, including green ceramic machining and additive manufacturing technologies.

show abstract

“…At present, the forming methods of SiAlON ceramics are mainly hot pressing, cold isostatic, gel casting and freeze-drying. However, it is difficult to obtain a ceramic component with complex shapes by the above forming methods [13][14][15]. For hot pressing and cold isostatic, it is not economical and convenient to form complex shapes due to the limitations of the mould.…”

Section: Introductionmentioning

confidence: 99%

THE SHRINKAGE, PHASE COMPOSITION AND MECHANICAL PROPERTIES OF CERAMICS WITH DIFFERENT β-SiAlON MAIN CRYSTALLINE PHASES PREPARED BY STEREOLITHOGRAPHY

Tian¹

2020

Ceramics - Silikaty

View full text Add to dashboard Cite

In this paper, using Si 3 N 4 , Al 2 O 3 and AlN particles as raw materials, β-SiAlON ceramics with different main crystal phases were designed. The green body of the β-SiAlON-matrix ceramic samples were obtained by using stereolithography (SLA) additive manufacturing. After degreasing, dense β-SiAlON ceramics with different SiAlON phases were fabricated through gas pressure sintering at 1800 °C for 1 hour at GPa. The effects of the different Al 2 O 3 contents on the shrinkage, phase composition, relative density, microstructure, mechanical property and hardness were studied. The results indicate that the main phase of the ceramics was β-SiAlON and the specific chemical compositions of it were Si 5 AlON 7 , Si 3.1 Al 2.9 O 2.9 N 5.1 and Si 2 Al 4 O 4 N 4 . The intergranular phases that exists were mainly Y 3 Al 5 O 12 , YAlO 3 and Al 2 O 3 . With a relative density of 90.03 %, the Vickers hardness (Hv5), bending strength and fracture toughness of the fabricated β-Si 5 AlON 7 ceramics were 16.8 GPa, 465 MPa and 4.84 MPa•m 1/2 , respectively. Meanwhile, the shrinkage of the materials was 28.7 %

show abstract

Gel casting of sialon ceramics based on water soluble epoxy resin

Cited by 12 publications

References 26 publications

Netshape centrifugal gel-casting of high-temperature sialon ceramics

Netshape centrifugal gel-casting of high-temperature sialon ceramics

Methods Used for the Compaction and Molding of Ceramic Matrix Composites Reinforced with Carbon Nanotubes

THE SHRINKAGE, PHASE COMPOSITION AND MECHANICAL PROPERTIES OF CERAMICS WITH DIFFERENT β-SiAlON MAIN CRYSTALLINE PHASES PREPARED BY STEREOLITHOGRAPHY

Contact Info

Product

Resources

About