Molten Salt Corrosion of SiC and Si<sub>3</sub>N<sub>4</sub> Ceramics‐

Tressler, R. E.; Meiser, M.D.; Yonushonis, T. M.

doi:10.1111/j.1151-2916.1976.tb10962.x

Cited by 71 publications

(11 citation statements)

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“…Some basic oxides, e.g., PbO and Na 2 O, can dissolve the protective SiO 2 scale to form silicates [178]. Silicon carbide is also corrosive in Na 2 SO 4 [179,180] and a mixture of Na 2 CO 3 and KNO 3 . Moreover, SiC reacts readily with chlorine and sulfur above 1173 and 1273 K, respectively [181].…”

Section: Chemical Propertiesmentioning

confidence: 99%

Handbook of SiC properties for fuel performance modeling

Snead

Nozawa

Katoh

et al. 2007

Journal of Nuclear Materials

1,200

582

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Section: Chemical Propertiesmentioning

confidence: 99%

Handbook of SiC properties for fuel performance modeling

Snead

Nozawa

Katoh

et al. 2007

Journal of Nuclear Materials

1,200

582

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“…Detailed microstructural analysis of the phases was not carried out, but the presence of inclusions containing Fe, Ni, and/or Ti has been reported in similar material. 9 The specimens were near theoretical density with no interconnected porosity.…”

Section: Reaction-bonded Sicmentioning

confidence: 99%

Degradation of SiC-Base Materials in Environments Containing Potassium Salt Vapors

Pareek

Shores

1992

Corrosion

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Studies have shown that low levels of potassium salt vapor contaminants drastically lower the oxidation resistance of ␣-SiC. In this study, reaction-bonded SiC and a composite SiC + TiB 2 suffered considerably more attack in environments containing potassium salt vapors than ␣-SiC. The kinetics were investigated by thermogravimetric analysis (TGA), while x-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to characterize the scales. In an attempt to mitigate the degradation, a thin aluminum layer was applied by physical vapor deposition and then oxidized to alumina. When applied to ␣-SiC, the Al 2 O 3 layer reduced the corrosion rate where good overlayer coatings were achieved.

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“…Tressler et al [127] evaluated the behavior of hot pressed and reaction bonded silicon carbide in sodium sulfate, sodium chloride, and a 63%/37% mixture of said materials in a fused silica crucible at 1000C in air for times up to 120 h. The silicon carbide specimens experienced a slight increase in weight that was attributed to the formation of a silicon dioxide surface layer. It was stated that the silicon dioxide layer was not affected by the liquid sodium chloride because the melt was not sufficiently basic (the free-oxide ion activity was not high enough).…”

Section: Corrosionmentioning

confidence: 99%