CTE homogeneity, isotropy and reproducibility in large parts made of sintered SiC

Bougoin, M.; Castel, D.; Levallois, Franck

doi:10.1117/12.2309208

Cited by 5 publications

(2 citation statements)

References 7 publications

(12 reference statements)

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“…This choice was made for greater clarity of the data ((T) and the reference temperature T0, for which (T0) = 0, are often omitted) and providing a more direct evaluation of thermal stresses ( = Ese(T)(T -T0), see section 3.5.) An excellent agreement is found between the values measured from the reference -SiC specimen and those found in the literature for the same material [46] or other types of pure and dense SiC, whatever the polytype [65]. As expected, the thermal expansion of the CVI/CVD sample is very close to that of the reference -SiC.…”

Section: Density and Porous Networksupporting

confidence: 83%

“…A blank measurement was carried out in exactly the same conditions, but without any sample, to remove the contribution of the surrounding device from the original signal. A high density polycrystalline -SiC specimen (sintered, 3.16 g.cm-3 , from Boostec, France) was analyzed in parallel with the lattice structures for comparison and validation of the measurements[46]. The corrected strain-temperature curve (T) was then obtained as well as the secant coefficient of thermal expansion se(T), defined with respect to the room temperature T0 according to Eq.…”

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confidence: 99%

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Synthesis and properties of macroporous SiC ceramics synthesized by 3D printing and chemical vapor infiltration/deposition

Baux

Goillot

Jacques

et al. 2020

Journal of the European Ceramic Society

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Open porosity cellular SiC-based ceramics have a great potential for energy conversion, e.g. as solar receivers. In spite of their tolerance to damage, structural applications at high temperature remain limited due to high production costs or inappropriate properties. The objective of this work was to investigate an original route for the manufacturing of porous SiC ceramics based on 3D printing and chemical vapor infiltration/deposition (CVI/CVD). After binder jetting 3D-printing, the green α-SiC porous structures were reinforced by CVI/CVD of SiC using CH3SiCl3/H2. The multiscale structure of the SiC porous specimens was carefully examined as well as the elemental and phase content at the microscale. The oxidation and thermal shock resistance of the porous SiC structures and model specimens were also studied, as well as the thermal and mechanical properties. The pure and dense CVI/CVD-SiC coating considerably improves the mechanical strength, oxidation resistance and thermal diffusivity of the material.

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Section: Density and Porous Networksupporting

confidence: 83%

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confidence: 99%