Functionally gradient material of silicon carbide and carbon as advanced oxidation-resistant graphite

Fujii, Kimio; Imai, Hisashi; Nomura, Shigeo; Shindo, Masami

doi:10.1016/0022-3115(92)90498-a

Cited by 16 publications

(7 citation statements)

References 2 publications

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“…The details of the procedure have been described in the literature. 5,6 The structure of the SiC produced by CVD was also ␤, and the coating thickness was about 100 m. Weight gain was observed owing to incorporation of Si atoms during the SiC/C graded layer formation. An average Si content was estimated from the following equation:…”

Section: (1) Materialsmentioning

confidence: 99%

Mechanical Properties of Oxidation‐Resistant SiC/C Compositionally Graded Graphite Materials

Nakano¹,

Fujii²,

Yamada³

1997

Journal of the American Ceramic Society

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Mechanical properties of oxidation-resistant SiC/C compositionally graded graphite materials composed of a CVD SiC coating layer, a SiC/C graded layer, and a graphite substrate were studied by bending, compressive, and hardness tests at room temperature. CVD SiC coated graphite and graphite with a SiC/C graded layer alone were also examined. The bending strengths of oxidation-resistant SiC/C compositionally graded graphite materials as well as CVD SiC coated graphite were about twice as much as that of graphite. The bending and compressive strengths of graphite with the SiC/C graded layer alone were almost the same as those of graphite. The higher strengths of graphite with the CVD SiC layer can be mainly due to the CVD SiC strength itself, and partly due to the smooth CVD surface. No effect of the SiC/C layer on the strengths was discussed in terms of porosity, surface morphology, and the strength of SiC.

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Section: (1) Materialsmentioning

confidence: 99%

Mechanical Properties of Oxidation‐Resistant SiC/C Compositionally Graded Graphite Materials

Nakano¹,

Fujii²,

Yamada³

1997

Journal of the American Ceramic Society

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“…When silicon carbide (SiC) acts as a protective layer for the graphite substrate and prevents erosion by active species like hydrogen or oxygen atoms at high temperatures, a functionally graded ceramic (FGC) made up of SiC and graphite could be an excellent material with high chemical stability at high temperature. 1,2 This SiC/graphite FGC also shows not only its good thermal conductivity at high temperatures but also its thermal shock resistance by moderating the thermal stress distribution between SiC and graphite having different thermal expansion coefficients. 1 The thickness of the FGC structure must be as large as possible to minimize the tensile stress created near the surface of a portion of a piece of the FGC structure.…”

Section: Introductionmentioning

confidence: 99%

“…1 The thickness of the FGC structure must be as large as possible to minimize the tensile stress created near the surface of a portion of a piece of the FGC structure. Conventional processes, such as chemical vapor deposition 1 and slip casting, 3 could not be suited for generating thick SiC/graphite FGC with complicated structures.…”

Section: Introductionmentioning

confidence: 99%

“…This SiC/graphite FGC also shows not only its good thermal conductivity at high temperatures but also its thermal shock resistance by moderating the thermal stress distribution between SiC and graphite having different thermal expansion coefficients 1 . The thickness of the FGC structure must be as large as possible to minimize the tensile stress created near the surface of a portion of a piece of the FGC structure.…”

Section: Introductionmentioning

confidence: 99%

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Experimental additive manufacturing of green body of SiC/Graphite functionally graded materials by stereolithography

Ueta

Imai

Watanabe

et al. 2022

Int J Applied Ceramic Tech

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Ceramic stereolithography (CSL)-additive manufacturing (AM) technology is used to create a functionally graded ceramic (FGC) green body made of silicon carbide (SiC) and graphite. For the SiC/graphite FGC, the mixing parameters of ceramics powders and ultraviolet (UV) curing resin are improved, and correlations of the resultant slurry curing depth with integrated light intensity are discovered. Therefore, the SiC/graphite FGC-produced green body has no flaws, pores, or cracks on its surfaces. According to the association between cure depth and integrated light density for each slurry's composition, several interfacial collapses discovered in a cracked cross-section might be decreased.

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“…A good understanding of the vaporization behavior of SiC at high temperatures may lead to new insights into the low-pressure chemical vapor deposition of SiC, the use of SiC as a support material for high-temperature catalysts, the development of new high-temperature structural materials, and high-temperature semiconductors . The thermodynamics of small silicon carbide clusters can aid our understanding of stellar dynamics…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Study of Small Silicon Carbide Clusters with a Mass Spectrometer

Schmude

Gingerich

1997

J. Phys. Chem. A

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The Knudsen effusion mass spectrometric method has been used to measure the equilibrium partial pressures of SiC2, Si2C, Si2C2, and Si3C above the SiC−graphite system at temperatures between 1750 and 2000 K. New thermal functions have been calculated for these molecules from recent literature experimental and theoretical molecular parameters and combined with the measured partial pressures to obtain the atomization enthalpies, ΔH a,0, in kJ mol-1: 1247 ± 8 (SiC2), 1052 ± 10 (Si2C), 1652 ± 14 (Si2C2), and 1437 ± 14 (Si3C). The derived enthalpies of formation, ΔH f,298, in kJ mol-1, are 633 ± 9 (SiC2), 566 ± 11 (Si2C), 678 ± 15 (Si2C2), and 632 ± 15 (Si3C).

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Functionally gradient material of silicon carbide and carbon as advanced oxidation-resistant graphite

Cited by 16 publications

References 2 publications

Mechanical Properties of Oxidation‐Resistant SiC/C Compositionally Graded Graphite Materials

Mechanical Properties of Oxidation‐Resistant SiC/C Compositionally Graded Graphite Materials

Experimental additive manufacturing of green body of SiC/Graphite functionally graded materials by stereolithography

Thermodynamic Study of Small Silicon Carbide Clusters with a Mass Spectrometer

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