Corrosion of ceramic materials in hot gas environment
Corrosion of ceramic materials in hot gas environment
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DOI：
10.1002/9780470291191.ch70
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发表时间：
2008-03
期刊：
影响因子：
--
通讯作者：
H. Klemm;M. Fritsch;B. Schenk
中科院分区：
文献类型：
--
作者：
H. Klemm;M. Fritsch;B. Schenk
研究了各种氧化物和非氧化物陶瓷材料在热气体环境中的耐腐蚀性能。测试在1450 °C的高温燃烧器装置中进行，气体流速为100 m/s，水蒸气压力为0.27 bar。材料的腐蚀特征在于重量平衡的测量和微观结构的调查。硅基非氧化物陶瓷材料表现出典型的降解行为，伴随着氢氧化硅的生成和挥发。在氧化物材料的情况下发现不同的行为。同时发现ZrO 2在该环境中是稳定的，观察到对氧化铝和莫来石的高腐蚀侵蚀。氧化物化合物，如稀土二硅酸盐或石榴石结构分解，形成相当致密的氧化物表面层，保护材料免受进一步腐蚀。
The corrosion resistance of various oxide and non-oxide ceramic materials in hot gas environment was investigated. The tests were performed in a high temperature burner rig at 1450 °C with 100 m/s gas flow speed and a water vapor pressure of 0.27 bar. The corrosion of the materials was characterized by the measurement of the weight balance and microstructural investigations. Non-oxide ceramic materials based on silicon exhibited the typical degradation behavior with the formation and evaporation of silicon hydroxides. A different behavior was found in case of oxide materials. Meanwhile ZrO 2 was found to be stable in this environment, a high corrosion attack was observed for alumina and mullite. Oxide compounds e.g. Rare Earth disilicates or garnet structures decompose with the formation of a fairly dense oxide surface layer protecting the materials from further corrosion.