Improving the homogeneity and reliability of ceramic parts with complex shapes by pressure-assisted gel-casting

Huang, Yong; Ma, Liguo; Le, Huirong; Yang, Jinn‐Shyong

doi:10.1016/j.matlet.2004.08.015

Cited by 25 publications

(3 citation statements)

References 8 publications

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“…Yet just as shown in Fig. 1, more attention should be paid to the microstructural homogeneity, which was critical for achieving subsequent densification [20].…”

Section: Resultsmentioning

confidence: 99%

Near-net-shape processed ZnS ceramics by aqueous casting and pressureless sintering

Yin

2016

Ceramics International

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In this paper, slip casted ZnS ceramics were pressurelessly sintered at 1000 o C under flowing argon atmosphere. The application of cold isostatic pressing enhanced the microstructural homogeneity of the ZnS green body and therefore contributed to the overall densification progress. Highest relative density of 92% was achieved after sintering for 6 hr, accompanied by remarkable grain growth. Phase transition from sphalerite to wurtzite was found by the prolonged soaking time. The mechanisms for grain growth were analyzed.

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“…Yet just as shown in Fig. 1, more attention should be paid to the microstructural homogeneity, which was critical for achieving subsequent densification [20].…”

Section: Resultsmentioning

confidence: 99%

Near-net-shape processed ZnS ceramics by aqueous casting and pressureless sintering

Yin

2016

Ceramics International

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“…In particular, gel casting has been effectively combined with the tape casting and injection molding. The latter got a name colloidal injection molding of ceramics (CIMC) [159,160,[185][186][187].…”

Section: Gel Castingmentioning

confidence: 99%

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

Мешалкин

Belyakov

2020

Processes

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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.

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“…In the current study, we select the gel-casting method to make such green carbon bodies due to its advantages such as to make green bodies with near-net-shape, high strength, high quality, and high density, etc. Currently, a commonly used aqueous gel-casting system includes acrylamide (AM) as the monomer, N,N'-Methylenebisacrylamide (MBAM) as the crosslinking agent and ammonium persulphate (APS) as the initiator [7][8][9][10][11][12][13][14]. Unfortunately, the addition of carbon black to this system exerts a detrimental effect on the gelation.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and properties of dense silicon carbide ceramic via gel-casting and gas silicon infiltration

Huang

Liu

Wang

et al. 2016

Ceramics International

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The dense Silicon Carbide (SiC) ceramics are fabricated by means of gel-casting and gas silicon infiltration (GSI) using carbon black and α-SiC as raw materials. We have successfully introduced a new initiator AIBA which is very suitable to aqueous gel-casting system containing carbon black, overcoming the problems posed by the conventionally used initiator. We have investigated the influences of the monomer acrylamide (AM) content, the ratio of the monomer to crosslinking agent AM/MBAM content, the particle size distribution and the solid content on the mechanical and structural properties of samples. The result show that, the linear shrinkage of the green body can be reduced to 1.0% and its bending strength can reach 59.2 MPa at the optimized gel-casting process that has an AM content of 25 wt.%, an AM to MBAM ratio of 12, a SiC particle distribution of 3/2 and a solid content of 60 vol.%. After the GSI process, the bending strength and elastic modulus of the final products from such green bodies can reach 245 MPa and 220 GPa respectively. The study highlights that the combined application of the gel-casting and the GSI processes can produce high-quality silicon carbide ceramics that are suitable in the space optical applications.

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Improving the homogeneity and reliability of ceramic parts with complex shapes by pressure-assisted gel-casting

Cited by 25 publications

References 8 publications

Near-net-shape processed ZnS ceramics by aqueous casting and pressureless sintering

Near-net-shape processed ZnS ceramics by aqueous casting and pressureless sintering

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

Fabrication and properties of dense silicon carbide ceramic via gel-casting and gas silicon infiltration

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