Joining of silicon carbide composites for fusion energy applications

Lewinsohn, Charles A.; Singh, Mrityunjay; Shibayama, Tamaki; Hinoki, Tatsuya; Ando, Masami; Katoh, Yutai; Kohyama, Akira

doi:10.1016/s0022-3115(00)00247-6

Cited by 41 publications

(31 citation statements)

References 9 publications

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“…1). State of the art in SiC/SiC composites has solved most of the potential issues of near-net shaping and machining, joining technology and evaluation technology [68][69][70][71][72][73][74][75][76][77][78][79][80][81][82][83][84][85][86]. There are no doubts that SiC/SiC composites are at the forefront of advanced materials technology and prime candidates for structural material in severe environments.…”

Section: Introductionmentioning

confidence: 99%

Erosive Wear Mechanism of New SiC/SiC Composites by Solid Particles

Suh

Hinoki

2010

Tribol Lett

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A solid-particle erosive wear test by impinging silicon carbide (SiC) powders was carried out at room temperature over a range of median particle sizes of 425-600 lm, speed of 100 m/s and impact angle of 90°a nd assessed by wear measurements and scanning electron microscopy. Erosive wear behaviour was examined on newly fabricated nano-powder infiltration and transient eutectoid (NITE) SiC/SiC composites and two commercial composites by the chemical vapour infiltration (CVI) and NITE fabrication route. Microstructural observation was performed to examine the correlation between erosive wear behaviours and fabrication impurities. Conspicuous defects were observed in the prototype materials as the forms of porosity, fibre deformation, residual oxide, pyrolytic carbon (PyC) deformation, PyC cleavage, among others. Erosive wear behaviour was rather serious in the prototype of fabricated composites, which employ pre-SiC fibre and phenolic resin. Two dominant erosive wear mechanisms were observed: delamination of constituents, mainly caused by erosive crack propagation, and fragmentation and detachment of constituents, which usually resulted from erosive impact. A unit size of delamination was the most decisive factor affecting wear volume. The bonding strength of each constituent was mostly affected by various forms of porosities. Therefore, the fundamental cause and subsequent results must be carefully elucidated. The correlation of microstructural defect and wear behaviour was investigated with the aim of reducing dominant wear by improving fabrication conditions. The final product of the cost-effective composite had a 2.5-fold higher resistance than the commercial CVI composite. Consequently, by controlling fabrication impurities, we have been successful in developing and improving a new fabrication technique; consequently, the known defects are rarely observed in final product. A schematic wear model of erosive wear mechanisms is proposed for the newly fabricated SiC/SiC composites under particle erosion.

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Section: Introductionmentioning

confidence: 99%

Erosive Wear Mechanism of New SiC/SiC Composites by Solid Particles

Suh

Hinoki

2010

Tribol Lett

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“…For the application of these materials to gas-cooled fusion blanket systems, they have to satisfy specific requirements, such as hermeticity and surface features, in addition to baseline thermo-mechanical and irradiation properties. The remaining critical issues include those associated with joining, heat transfer and plasma-surface interactions [1][2][3][4][5]. Tungsten as a coating material for SiC-based plasma-facing components has excellent advantages, such as a small mismatch in coefficient of thermal expansion (CTE), a very low sputtering yield, inherent heat resistance and high thermal conductivity [6,7].…”

Section: Introductionmentioning

confidence: 99%

Interfacial reactions and mechanical properties of W–SiC in-situ joints for plasma facing components

Son

Park

Katoh

et al. 2004

Journal of Nuclear Materials

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“…1(a) are the inner and outer span lengths, respectively. According to our previous experimental results for 50 L · 4 b · 4 h mm 3 , L 1 and L 2 were chosen to be 12 and 44 mm, respectively [9]. The lap joint shown in Fig.…”

Section: Model For Analysismentioning

confidence: 99%