Corrosion of silicon nitride ceramics under hydrothermal conditions

Sato, Tsugio; Murakami, Tadasu; Endo, Tadashi; Shimada, Masahiko; Komeya, Katsutoshi; Kameda, Tsuneji; Komatsu, Michiyasu

doi:10.1007/bf00543597

Cited by 31 publications

(13 citation statements)

References 8 publications

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“…Different reports have been done on the corrosion behavior of monolithic SiC and Si 3 N 4 ceramic in various hydrothermal conditions (e.g., subcritical hydrothermal conditions, 19,25,26 acid and basic environment 27,28 ) and revealed that their stability is mainly controlled by the grain boundaries or grain-boundary phase. 25 Under hydrothermal corrosion, Si-based ceramic materials such as SiC, Si 3 N 4 or SiOC exhibit active corrosion behavior, as the solubility of the passivation scale SiO 2 is significant in subcritical hydrothermal conditions.…”

Section: Hydrothermal Corrosion Behavior Of C F /Sicn and C F /Sihfbcmentioning

confidence: 99%

Preparation and hydrothermal corrosion behavior of Cf/SiCN and Cf/SiHfBCN ceramic matrix composites

Yuan

Luan

Riedel

et al. 2015

Journal of the European Ceramic Society

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Section: Hydrothermal Corrosion Behavior Of C F /Sicn and C F /Sihfbcmentioning

confidence: 99%

Preparation and hydrothermal corrosion behavior of Cf/SiCN and Cf/SiHfBCN ceramic matrix composites

Yuan

Luan

Riedel

et al. 2015

Journal of the European Ceramic Society

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“…Numerous different investigations of silicon nitride materials in acids have been carried out . Sometimes it is difficult to compare the data directly because the composition is not always completely described, or the conditions of corrosion, especially the ratio of the sample volume or surface to the volume of the used solution, are not always clear.…”

Section: Corrosion Of Si3n4 Materials With Sintering Additivesmentioning

confidence: 99%

“…Investigation of the corrosion stability of these ceramics in aqueous media started in the 1990s due to the increasing use of the material in ball bearings . These investigations revealed the strong relationship between the grain‐boundary phase and the chemical stability, but a more systematic investigation and derivation of the correlation between composition and microstructure with the corrosion properties in the different media only occurred at the beginning of the 21st century.…”

Section: Introductionmentioning

confidence: 99%

Corrosion of Silicon Nitride Materials in Aqueous Solutions

Herrmann

2013

J. Am. Ceram. Soc.

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Silicon nitride ceramics are used under conditions where high strength, hardness, and wear resistance are necessary. The increasing use of Si3N4 ceramics in different environments demands an understanding of the relationships between microstructure and corrosion behavior. This study gives an overview of the behavior of silicon nitride in acids, bases, and hydrothermal conditions. It not only summarizes the literature data but also attempts to explain the mechanisms and to give some guidelines for the use of the materials in different environments. The stability of the ceramics against corrosion in acids and bases up to the boiling point is mostly controlled by the stability of the grain boundary. The stability can be predicted using the glass network theory. Materials with grain boundaries exhibiting a strong network, i.e., a high amount of SiO2 in the grain boundary, are stable in acids, but less stable under hydrothermal conditions and in basic solutions. Therefore, tailoring the grain boundaries can change the corrosion stability by several orders of magnitude. At temperatures above 200°C–250°C, the dissolution of the Si3N4 grains becomes a decisive factor determining the stability.

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“…2,17,[28][29][30][31][32] Powinno się używać drobnoziarnistych wierteł dobrej jakości, z obfitym chłodze-niem wodnym.…”

Section: Dostosowywanie Uzupełnieniaunclassified

“…17,[30][31][32] Nieuzasadnione jest stosowanie wybiórcze-go licowania porcelaną struktury cyrkonowej. Takie działanie eksponuje strukturę cyrkonową niepokrytą ceramiką na działanie wilgoci, stale obecnej w jamie ustnej i tym samym przyspiesza proces degradacji.…”

Section: Wilgoćunclassified