Effect of Sintering Temperature on the Properties of Fused Silica Ceramics Prepared by Gelcasting

Wan, Wei; Huang, Chun-e; Yang, Jian; Zeng, Jinzhen; Qiu, Tai

doi:10.1007/s11664-014-3112-7

Cited by 56 publications

(28 citation statements)

References 20 publications

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“…19,[25][26][27] Chartier et al 28 have investigated the use of SLA for manufacturing ceramic structures and have demonstrated successful production of detailed and precise complex lattice systems. 33 In conjunction with the production of 3D printed-based ceramics, the transformation of ceramic systems into ceramic-metallic structures via molten metal phase infiltration represents an attractive approach for yielding interpenetrating phase composites (IPCs). They reported a final shrinkage of approximately 24% from the initial dimensions.…”

Section: Introductionmentioning

confidence: 99%

“…32 The characteristics of silica, which include good corrosion and thermal shock resistance, low coefficient of thermal expansion, low thermal conductivity, and good insulating properties, place it as an attractive material in several functional and structural applications. 33 In conjunction with the production of 3D printed-based ceramics, the transformation of ceramic systems into ceramic-metallic structures via molten metal phase infiltration represents an attractive approach for yielding interpenetrating phase composites (IPCs). 34 Metal-ceramic composites have a large number of applications in the aerospace, automotive, and military industries due to benefits of high-strength and reduced weight.…”

Section: Introductionmentioning

confidence: 99%

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The fracture properties of metal‐ceramic composites manufactured via stereolithography

Mummareddy

Maravola

MacDonald

et al. 2019

Int J Applied Ceramic Tech

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In this work, metal-ceramic composite parts based on aluminum and alumina were manufactured in a two-stage process. First, silica was printed using a vat photopolymerization technique, followed by a curing and sintering stage, which resulted in ceramic precursors. Subsequently, these samples were subjected to a metal infiltration process to form interpenetrating metal-ceramic composites (IPCs). These composites have attracted considerable attention in the aerospace and defense sector due to the ductility associated to the metal phase and the strength offered by the ceramics. A novel application with utility includes composite tooling which requires a low coefficient of thermal expansion (CTE) for high temperatures. The investigated specimens were tested for surface quality and shrinkage, followed by a mechanical characterization. It was recorded that the samples presented a 12%-18% of shrinkage after the sintering process. The mechanical testing showed that the hardness, compression, and flexural strength of the composites were superior to the printed and sintered ceramics. A thermal analysis on the composite showed that its CTE is more than two times lower than the common composite tooling materials. It is expected that the present work can provide the foundations for further studies on these systems in the refractory, automotive, and armor-based fields. K E Y W O R D Sceramic-metal systems, fracture, mechanical properties 414 | MUMMAREDDY Et Al.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The fracture properties of metal‐ceramic composites manufactured via stereolithography

Mummareddy

Maravola

MacDonald

et al. 2019

Int J Applied Ceramic Tech

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“…As a result of these properties, fused silica is also excellent structural and functional material in many di erent elds of application such as crucibles in metallurgy and polysilicon industry, thermal resistance materials in the aircraft industry, and high-temperature microwave-transparent materials. Fused silica ceramics are commonly made by fusion of pure silica sand with a silica content of approximately 99% [20,21].…”

Section: Fused Silicamentioning

confidence: 99%

Various types of ceramics used in radome: A review

et al. 2017

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Advanced tactical missiles need radomes of higher strength capable of withstanding higher velocities and temperatures and longer ight durations. Radomes must be stable at temperature above 1400 C and must have a low and steady thermal dielectric constant, low thermal expansion coe cient, high resistance to thermal shock, high sti ness and strength, high chemical stability, and high resistance against moisture. Silicon nitride, in comparison with other materials used in the fabrication of radomes (e.g., fused Silica, pyroceramics, etc.), enjoys superior properties, and it can also be used at ight speeds higher than Mach 7. In this paper, various types of raw materials used in the fabrication of radomes have been investigated.

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“…To achieve maximum mechanical strength, the consolidated green body of fused silica has to be sintered at very high temperature, which is roughly more than 1200°C. The high‐temperature densification causes devitrification of fused silica; this leads to structurally weak product and attaining heterogeneity in terms of electromagnetic transmission due to cristobalite formation . Breneman and Halloran have concluded that the maximum transformation of silica from amorphous to cristobalite takes place between 1500 and 1550°C.…”

Section: Introductionmentioning

confidence: 99%

“…The high-temperature densification causes devitrification of fused silica; this leads to structurally weak product and attaining heterogeneity in terms of electromagnetic transmission due to cristobalite formation. 17 Breneman and Halloran 18 have concluded that the maximum transformation of silica from amorphous to cristobalite takes place between 1500 and 1550°C. They have also studied the effect of cristobalite on the strength of sintered fused silica above and below the cristobalite transformation with 5% residual quartz.…”

Section: Introductionmentioning

confidence: 99%

Reliability studies of gelcast fused silica between organic and inorganic binder systems

Manivannan

Srikanth

Kumar

et al. 2017

Int J Applied Ceramic Tech

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Fused silica ceramics was prepared by using conventional organic binder, mathacrylamide‐N,N′‐methylenebisacrylamide (MAM‐MBAM) system by gelcasting process. Mechanical properties of green bodies were studied as a function of solid loading varying from 60 to 72 vol%. After evaluating the green body mechanical properties, the samples were densified at different sintering temperature from 1200 to 1450°C with definite intervals of 50°C and subjected to flexural strength analysis. Variation in flexural strength with sintering temperature was observed and correlated with the quantity of devitrification of fused silica during sintering. Quantification of devitrified cristobalite was carried out by using 20 wt% rutile (TiO2) as an internal standard by X‐ray diffraction. It was found that, as the cristobalite content increased, flexural strength decreased. Reliability studies were carried out for the samples having maximum flexural strength with and without crystalline content. Reliability studies have shown that for this organic binder system the sample sintered at 1300°C is crystalline free and most reliable product. The mechanical properties and reliability of this product processed with organic binder are compared with inorganic binder system. Results indicate that the sample fabricated using inorganic binder system is exhibiting high Weibull modulus and thus better reliability.

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Effect of Sintering Temperature on the Properties of Fused Silica Ceramics Prepared by Gelcasting

Cited by 56 publications

References 20 publications

The fracture properties of metal‐ceramic composites manufactured via stereolithography

The fracture properties of metal‐ceramic composites manufactured via stereolithography

Various types of ceramics used in radome: A review

Reliability studies of gelcast fused silica between organic and inorganic binder systems

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