Comparison of hydrothermal corrosion behavior of SiC with Al2O3 and Al2O3 + Y2O3 sintering additives

Xie, Xin; Liu, Bing; Liu, Rongzheng; Zhao, Xiaofeng; Ni, Na; Xiao, Ping

doi:10.1111/jace.16890

Cited by 5 publications

(2 citation statements)

References 49 publications

(127 reference statements)

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“…Alumina is rapidly dissolved by water, thus leaving the grain boundaries of the material open, which is catastrophic for corrosion resistance. On the contrary, yttria(Y 2 O 3 ) used with alumina [157] forms a eutectic compound (Y 3 Al 5 O 12 ) which acts as a protective barrier for corrosion. Similarly, adding chromium leads to the formation of chromium oxide, another protective oxide [158].…”

Section: The Use Of Silicon Carbide In the Nuclear Fieldmentioning

confidence: 99%

Behavior of Silicon Carbide Materials under Dry to Hydrothermal Conditions

et al. 2021

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Silicon carbide materials are excellent candidates for high-performance applications due to their outstanding thermomechanical properties and their strong corrosion resistance. SiC materials can be processed in various forms, from nanomaterials to continuous fibers. Common applications of SiC materials include the aerospace and nuclear fields, where the material is used in severely oxidative environments. Therefore, it is important to understand the kinetics of SiC oxidation and the parameters influencing them. The first part of this review focuses on the oxidation of SiC in dry air according to the Deal and Grove model showing that the oxidation behavior of SiC depends on the temperature and the time of oxidation. The oxidation rate can also be accelerated with the presence of H2O in the system due to its diffusion through the oxide scales. Therefore, wet oxidation is studied in the second part. The third part details the effect of hydrothermal media on the SiC materials that has been explained by different models, namely Yoshimura (1986), Hirayama (1989) and Allongue (1992). The last part of this review focuses on the hydrothermal corrosion of SiC materials from an application point of view and determine whether it is beneficial (manufacturing of materials) or detrimental (use of SiC in latest nuclear reactors).

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Section: The Use Of Silicon Carbide In the Nuclear Fieldmentioning

confidence: 99%

Behavior of Silicon Carbide Materials under Dry to Hydrothermal Conditions

et al. 2021

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“…The liquid phase acts as a path for the SiC particle diffusion, enhancing the densification. The other additives that are effective for the sintering of SiC are Y2O3-SiO2, Al2O3-Y2O3-MgO, Al2O3-Y2O3-CaO, Sc2O3, Ho2O3, Yb2O3, Al2O3-RE2O3 [11][12][13][14][15][16][17][18][19][20][21]. Certainly, one of the key factors that is important in the liquid phase sintering is the homogeneous distribution of the liquid phase, which corresponds to the particle size of the additives [22].…”

Section: Introductionmentioning

confidence: 99%

Enhancing the density of silicon carbide with the addition of nitrate-based additives

Dioktyanto

Aryanto²,

Noviyanto

et al. 2022

J min metall B Metall

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Dense monolithic silicon carbide (SiC) was successfully sintered by hot-pressing at 1750 ?C for 1 h under an applied pressure of 20 MPa with the addition of a nitrate-based additive. A relative density of more than 98% were obtained with the addition of MgO-Y2O3 and Al2O3-Y2O3 in nitrate form, while in the oxide form they were 85.0 and 96.0%, respectively. Indeed, MgO-Y2O3 showed poor densification due to the eutectic temperature of 2110?C, however, the addition of nitrate form of MgO-Y2O3 enhanced the densification greatly. The sintering mechanism in the nitrate-based additive is liquid phase sintering, which is identified by the presence of an oxide phase, i.e., Y2O3 in the SiC with the addition of Al2O3-Y2O3 in nitrate form. Moreover, the addition of nitrate form suppressed the grain growth of SiC, which was believed to be due to the adequate rearrangement stage during sintering.

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Corrosion behavior and mechanism of the Y2O3–Al2O3–SiO2 system during long-term corrosion in water-oxygen environment at 1350 °C

Yang

Meng

et al. 2023

Ceramics International

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Comparison of hydrothermal corrosion behavior of SiC with Al₂O₃ and Al₂O₃ + Y₂O₃ sintering additives

Cited by 5 publications

References 49 publications

Behavior of Silicon Carbide Materials under Dry to Hydrothermal Conditions

Behavior of Silicon Carbide Materials under Dry to Hydrothermal Conditions

Enhancing the density of silicon carbide with the addition of nitrate-based additives

Corrosion behavior and mechanism of the Y2O3–Al2O3–SiO2 system during long-term corrosion in water-oxygen environment at 1350 °C

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