Oxidation resistance of SiC ceramics prepared by different proceessing routes

Kovalčíková, Alexandra; Sedláček, Jaroslav; Lenčéš, Zoltán; Bystrický, Roman; Dusza, Ján; Šajgalı́k, Pavol

doi:10.1016/j.jeurceramsoc.2016.03.016

Cited by 50 publications

(13 citation statements)

References 38 publications

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“…From the exponential coefficient given by figure 11 b) and according to equation (6), the activation energy E a is estimated around 820 kJ mol -1 . This relatively high value of E a can be explained by the presence of aluminum that enhances the oxygen diffusion through the silica layer [21]. As can be deduced from table 2, the second hypothesis gives results more coherent with the SEM observations regarding the Si-SiC 6 sample.…”

Section: Oxidationsupporting

confidence: 66%

The impact of oxidation on the optical properties of Si–SiC materials

Charpentier

Caliot

Sans

et al. 2020

Ceramics International

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Section: Oxidationsupporting

confidence: 66%

The impact of oxidation on the optical properties of Si–SiC materials

Charpentier

Caliot

Sans

et al. 2020

Ceramics International

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“…Silicon carbide (SiC) is an important engineering ceramic due to a unique combination of properties, such as high thermal conductivity, excellent wear and corrosion resistances, and high‐temperature mechanical properties . SiC‐ceramic applications include heaters, susceptors, dummy wafers for the processing of semiconductors and light‐emitting diodes (LED), diesel particulate filters, and heat exchangers, taking advantage of the excellent thermal conductivity and relative properties of the material.…”

Section: Introductionmentioning

confidence: 99%

High thermal conductivity of spark plasma sintered silicon carbide ceramics with yttria and scandia

et al. 2017

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A fully dense SiC ceramic with a room-temperature thermal conductivity of 262 WÁ(mÁK) À1 was obtained via spark plasma sintering b-SiC powder containing 0.79 vol% Y 2 O 3 -Sc 2 O 3 . High-resolution transmission electron microscopy revealed two different SiC-SiC boundaries, that is, amorphous and clean boundaries, in addition to a fully crystallized junction phase. A high thermal conductivity was attributed to a low lattice oxygen content and the presence of clean SiC-SiC boundaries. K E Y W O R D S silicon carbide, spark plasma sintering, thermal conductivity

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“…According to calculations made from Figure 8 the activation energy value of SiC/IrSi3 materials amounts to EOxid = 58 kJ/mol. This activation energy turns out to be of the order of magnitude of oxidation processes by diffusion [42] and nearly half the value of the activation energy of oxidation of pure silicon in dry oxygen, EOxid = 120 kJ/mol [43] (minimum value taken by SiC/Si composite materials). These differences in activation energies show that oxide formation on the surface of composite materials with iridium is energetically more unfavorable than in materials with pure silicon.…”

Section: Thermomechanical Properties Of Sic/si and Sic/si-irsi3 Matermentioning

confidence: 92%

SiC-IrSi<sub>3</sub> for High Oxidation Resistance

Camarano

Giuranno

Narciso

2019

Preprint

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SiC is a material with excellent mechanical and thermal properties, but with a high production cost. Obtaining SiC by reactive infiltration is an attractive method and at a much lower cost than the traditional sintering process. However, the reactive infiltration process presents a serious problem, which is the high residual silicon content, which decreases its range of application. The replacement of silicon with silicides is a widely used alternative. The present investigation shows the good mechanical properties of the SiC/IrSi3 composite material obtained by reactive infiltration of SiC/C preforms with Ir-Si alloys. The thermomechanical analysis shows a high compatibility of silicide with SiC. The presence of the silicide shows a substantial improvement against the oxidation of the SiC/Si composites.

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Oxidation resistance of SiC ceramics prepared by different proceessing routes

Cited by 50 publications

References 38 publications

The impact of oxidation on the optical properties of Si–SiC materials

The impact of oxidation on the optical properties of Si–SiC materials

High thermal conductivity of spark plasma sintered silicon carbide ceramics with yttria and scandia

SiC-IrSi<sub>3</sub> for High Oxidation Resistance

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