Digital light processing of Si-based composite ceramics and bulk silica ceramics from a high solid loading polysiloxane/SiO2 slurry

He, Chao; Liu, Xinger; Ma, Cong; Cao, Yueqi; Hou, Feng; Yan, Liwen; Guo, Anran; Liu, Jiachen

doi:10.1016/j.jeurceramsoc.2021.07.016

Cited by 20 publications

(5 citation statements)

References 32 publications

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“…Clear Bragg lines at d = 3.339; 3.132; 2.290; 1.821; 1.668 Å, corresponding to β-cristobalite, are also fixed [14,30]. It should be noted that, according to the literature data, the formation of cristobalite (JCPDS 39-1425) from a polyalkylhydrosiloxane oligomer is possible during heat treatment at 1300-1400 °C in an electric furnace [31,32]. And in our study, the same results were obtained during thermal treatment at 300 °C with further electron irradiation.…”

Section: X-ray Diffraction Studiesmentioning

confidence: 84%

Synthesis and Characterization of Silicon–Carbon Powder and Its Resistance to Electron Irradiation

Pavlenko,

Cherkashina,

Edamenko

et al. 2023

J. Compos. Sci.

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The issue of crystallization of silicon oxide at low temperatures is a topical issue for the electronics of the future. Organosilicon oligomers and polymers are “ideal” sources for obtaining ultrapure silicon ceramics and silicon nanoparticles. This paper presents the results of the synthesis of highly dispersed silicon-carbon powder from an organohydrosiloxane oligomer and the method for increasing its crystallinity at low temperatures. The diffraction pattern of the resulting powder corresponds to the amorphous–crystalline state of the components in this material, as evidenced by two intense and broadened amorphous halos in the region of Bragg angles 2θ = 7–11° and 18–25°. The resulting silicon–carbon powder was subjected to electron irradiation (E = 10 MeV; D = 106–107 Gy). This paper presents the data on the changes in powder properties via IR-Fourier spectroscopy, X-ray phase analysis, and scanning electron microscopy. Irradiation with fast electrons with an absorbed dose of 106 Gy leads to a slight crystallization of the amorphous SiO2 phase. An increase in the absorbed dose of fast electrons from D = 106 to D = 107 Gy leads to the opposite effect. An amorphization of silica is observed. This study showed the possibility of the crystallization of a silicon–carbon powder without a significant increase in temperature, acting only with electron irradiation. It is necessary to continue further research on expanding the boundaries of the optimal doses of absorbed radiation from fast electrons in order to achieve the maximum effect of the crystallization of silicon–carbon powder.

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Section: X-ray Diffraction Studiesmentioning

confidence: 84%

Synthesis and Characterization of Silicon–Carbon Powder and Its Resistance to Electron Irradiation

Pavlenko,

Cherkashina,

Edamenko

et al. 2023

J. Compos. Sci.

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“…The sintering necks are grown under the action of atomic diffusion. The products (SiO 2 , SiCN, SiCNO and mullite) around the Al 2 O 3 particles contribute to the formation of reticulated sintering necks, increasing the bonding area between the Al 2 O 3 particles, which enhances the strength of PSZ-reinforced ceramic cores [15] , as shown in Fig. 9(d).…”

Section: Sintering Mechanismmentioning

confidence: 98%

“…At present, the solid content is typically above 50vol.% to ensure the strength of ceramic cores, and samples cannot be prepared when the solid content is below 40vol.% [2] . However, the printability will decrease when the solid content is above 55vol.% due to the increase of viscosity [15,16] .…”

mentioning

confidence: 99%

Effect of sintering temperature on microstructure and properties of 3D printing polysilazane reinforced Al2O3 core

Dong,

Li,

Chen

et al. 2023

China Foundry

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Ceramic cores are the key intermediate components of hollow blades for aero-engine, which affect the reliability and heat resistance of blades with complex cooling channels [1][2][3][4][5] . Therefore, the high precision of ceramic cores has been the goal of industry and academy. Conventional processes, such as hot-press moulding and gel film casting, are mature and high efficiency for ceramic cores with simple structures [6][7][8] .

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“…Figure 3 shows the common Si-based polymers. These kinds of silicon-based preceramic polymers can be converted to various types of ceramics, such as silicon carbide (SiC), silicon oxide (SiO 2 ), silicon oxycarbide (SiOC), and silicon carbonitride (SiCN), after pyrolysis [ 60 , 61 , 62 , 63 ]. Compared to ceramic powders, preceramic polymers offer much more flexibility for effectively fabricating ceramic components with complex geometric structures and shapes using a wide range of processes, such as casting, molding, and AM [ 3 , 64 ].…”

Section: Preceramic Feedstock Materials For Additive Manufacturingmentioning

confidence: 99%

Additive Manufacturing of Advanced Ceramics Using Preceramic Polymers

et al. 2023

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Ceramic materials are used in various industrial applications, as they possess exceptional physical, chemical, thermal, mechanical, electrical, magnetic, and optical properties. Ceramic structural components, especially those with highly complex structures and shapes, are difficult to fabricate with conventional methods, such as sintering and hot isostatic pressing (HIP). The use of preceramic polymers has many advantages, such as excellent processibility, easy shape change, and tailorable composition for fabricating high-performance ceramic components. Additive manufacturing (AM) is an evolving manufacturing technique that can be used to construct complex and intricate structural components. Integrating polymer-derived ceramics and AM techniques has drawn significant attention, as it overcomes the limitations and challenges of conventional fabrication approaches. This review discusses the current research that used AM technologies to fabricate ceramic articles from preceramic feedstock materials, and it demonstrates that AM processes are effective and versatile approaches for fabricating ceramic components. The future of producing ceramics using preceramic feedstock materials for AM processes is also discussed at the end.

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Digital light processing of Si-based composite ceramics and bulk silica ceramics from a high solid loading polysiloxane/SiO2 slurry

Cited by 20 publications

References 32 publications

Synthesis and Characterization of Silicon–Carbon Powder and Its Resistance to Electron Irradiation

Synthesis and Characterization of Silicon–Carbon Powder and Its Resistance to Electron Irradiation

Effect of sintering temperature on microstructure and properties of 3D printing polysilazane reinforced Al2O3 core

Additive Manufacturing of Advanced Ceramics Using Preceramic Polymers

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