Corrosion of Silicon Nitride Ceramics in Aqueous Hydrogen Chloride Solutions

Sato, Tsugio; Tokunaga, Y.; Endo, Tadashi; Shimada, Masahiko; Komeya, Katsutoshi; Komatsu, Michiyasu; Kameda, Tsuneji

doi:10.1111/j.1151-2916.1988.tb05794.x

Cited by 43 publications

(8 citation statements)

References 5 publications

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“…6) These results showed that the mechanical strength of the corroded Si Q N R ceramic was signi®cantly degraded due to the surface defects formed by the dissolution of the grain boundary phase. In the case of corrosion tests under hydrothermal conditions in water, an oxide ®lm was formed over the surface of the specimen.…”

Section: Introductionmentioning

confidence: 78%

Disintegration Behavior of Silicon Nitride Ceramic by Hydrothermal Treatment in Aqueous HF Solution

Kamiya¹,

Kojima²,

Sasai³

et al. 2004

J. Ceram. Soc. Japan

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HF 4 ¶²(D_4±aeAEk±¤ »éßÃ¯¹n)ÊÕ 7îûö y û9 ®ûäÀà äK'fãaeAEºåiv»ó¿ü464±8603 äKÂC.:Á:The possibility of recycling silicon nitride ceramic by hydrothermal treatment was investigated. A Si 3 N 4 sintered compact with 0.9 mass% SrCO 3 , 3.6 mass% MgO and 4.5 mass% CeO 2 as sintering aids was used as a specimen for treatment. Hydrothermal treatment was performed using aqueous HF solution at 70±150C for 0±120 h. The dense sintered compact was easily disintegrated into powdery particles and a core fragment by the combination of hydrothermal treatment and subsequent sonication treatment. The treated powder was identi®ed by X-ray diraction (XRD) analysis as -Si 3 N 4 containing CeF 3 and MgF 2 , which were formed in aqueous HF solution during hydrothermal treatment. These¯uorides were completely removed by rinsing in HNO 3 solution. Then, a powder consisting only of needle like -Si 3 N 4 crystals was recovered by a series of these treatments. X-ray photoelectron spectroscopy (XPS) revealed that the surface of the recovered Si 3 N 4 powder was oxidized very slightly. Hydrothermal treatment at 120 C for 24 h gave approximately 30% yield of powdery -Si 3 N 4 particles, excluding the amount of sintering aid components. In the case of hydrothermal treatment for shorter terms or at lower temperatures, the corrosion behavior of the Si 3 N 4 ceramic is linearly dependent on treatment time and is controlled by surface chemical reaction. The activation energies for the dissolution of the Si 3 N 4 ceramic, and the grain boundary components of strontium, magnesium and cerium were estimated as 31:9 AE

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Section: Introductionmentioning

confidence: 78%

Disintegration Behavior of Silicon Nitride Ceramic by Hydrothermal Treatment in Aqueous HF Solution

Kamiya¹,

Kojima²,

Sasai³

et al. 2004

J. Ceram. Soc. Japan

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“…Besides the described zirconia ceramics, several composites are used, with the most prominent being zirconia-toughened alumina containing 10-20 vol% ZrO 2 (ZTA) and alumina-toughened zirconia (ATZ). Y-TZP is widely used in cutting applications and dental implants and hence the hydrothermal stability of this material has been & Yoshimura, 1996;Sato et al, 1988b;Sato, Sato, Tamura, & Okuwaki, 1992;Sato, Tokunaga, Endo, et al, 1988a, 1988bSchilm et al, 2006;Schilm et al, 2007;Schilm, 2004;Schilm, Herrmann, & Michael, 2004a, 2004bSeipel & Nickel, 2003;Sharkawy & El-Aslabi, 1998;Shimada & Sato, 1989 Figure 12 Strengths of different ceramic materials after corrosion in 1 N NaOH, H 2 SO 4 and water at elevated temperatures (temperature is given in the graph) after 200h .…”

Section: Corrosion Of Different Ceramics In Aqueous Solutionsmentioning

confidence: 97%

Corrosion of Ceramic Materials

Herrmann

Klemm

2014

Comprehensive Hard Materials

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“…This finding is confirmed by the fact that HIPed Si 3 N 4 ceramic without sintering additives shows very high corrosion resistance. 17 In this case the X-value is approximately four. The nature of the network modifying ions e.g.…”

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confidence: 90%

Corrosion Behaviour of Silicon Nitride Ceramics in Aqueous Solutions

Herrmann

Schilm

Hermel

et al. 2006

J. Ceram. Soc. Japan

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Silicon nitride ceramics are used under conditions were high strength, hardness and wear resistant is necessary. The increasing use of Si 3 N 4 -ceramics as ceramic ball bearings and valves in chemical apparatus demand an understanding of the relations between microstructure and corrosion behaviour of silicon nitride ceramics in different environments. The stability of the ceramics against corrosion in acids and bases is mostly controlled by the stability of the grain boundary. Therefore, the influence of different rare earth ions and the influence of the crystallisation of the grain boundary on the stability in sulphuric acid were investigated. The results showed that the nature of the rare earth has a minor influence on the corrosion behaviour. The stability against corrosion of the ceramics with amorphous grain boundaries is mostly controlled by the amount of the SiO 2 in the grain boundary. The crystallisation of the grain boundary can improve or not change the corrosion behaviour depending on the amount of crystalline grain boundary phases and the composition stability of the residual amorphous grain boundary phase. The results are discussed in the context with previous investigation and some systematisation of the corrosion behaviour of Si 3 N 4 in acids and bases is given.

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Corrosion of Silicon Nitride Ceramics in Aqueous Hydrogen Chloride Solutions

Cited by 43 publications

References 5 publications

Disintegration Behavior of Silicon Nitride Ceramic by Hydrothermal Treatment in Aqueous HF Solution

Disintegration Behavior of Silicon Nitride Ceramic by Hydrothermal Treatment in Aqueous HF Solution

Corrosion of Ceramic Materials

Corrosion Behaviour of Silicon Nitride Ceramics in Aqueous Solutions

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