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CORROSION SCIENCE · 2022 · IF 7.72

Corrosion behavior of Yb4Hf3O12 ceramics exposed to Calcium-Ferrum-Alumina-Silicate (CFAS) coupled with water vapor at 1400 °C

Ling He,Ling Pan,Wei Zhou,Zibo Niu,Peng Xiao,Yang Li

In this work, the corrosion behavior of Yb 4 Hf 3 O 12 ceramics under CFAS coupled with water vapor environment at 1400 °C for 2–50 h was investigated. Results show that the CFAS were rapidly dissolved into ceramics under test environment, and then the Yb-Ca-Si apatite and Hf-rich fluorite phases were re-precipitated. Simultaneously, the water vapor corrosion mainly induced grain surface corrosion, resulting in the formation of corrosion pits and ridge-like structures. Moreover, the pores and microcracks caused by water vapor corrosion offer additional penetration path for CFAS melt.

CAS / MDL: 12055-23-1 1314-37-0

研究领域: 材料科学 · 化学

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JOURNAL OF THE AMERICAN CERAMIC SOCIETY · 2023 ·Vol. 107 ·期 1 ·475-487 · IF 3.9

Interaction and infiltration behavior between calcium–ferrum–alumina–silicate and Yb4Hf3O12 ceramics at various temperatures

Ling He,Ling Pan,Wei Zhou,Maolin Chen,Qinzhao Zhang,Wenqian Pan,Peng Xiao,Yang Li

The interaction and infiltration behavior between typical calcium–ferrum–alumina–silicate (CFAS) and Yb 4 Hf 3 O 12 ceramics at 1300, 1400, and 1500°C for different duration times were investigated. At 1300°C, the CFAS melt first crystallized and then generated massive anorthite with high-melting point, reducing the wettability of CFAS melt and physically blocking CFAS penetration paths. As the temperature increased to 1400°C and 1500°C, the wettability of the molten CFAS correspondingly increases. A continuous reaction layer, composed of apatite, fluorite, and garnet, was formed over Yb 4 Hf 3 O 12 ceramic due to the penetration of CFAS melt. Furthermore, the infiltration rate of CFAS decreases with increasing corrosion time because of the barrier effect primarily derived from the as-mentioned continuous reaction layer.

研究领域: 材料科学 · 陶瓷材料 · 高温材料 · 无机化学 · 表面化学

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Corrosion behavior of Yb4Hf3O12 ceramics exposed to Calcium-Ferrum-Alumina-Silicate (CFAS) coupled with water vapor at 1400 °C

Interaction and infiltration behavior between calcium–ferrum–alumina–silicate and Yb4Hf3O12 ceramics at various temperatures