(1. 西安交通大學 金屬材料強度國家重點實驗室, 西安 710049；
2. 西安理工大學 材料學院, 西安 710048)
摘 要: 研究了氣、 冰晶石、 鋁液三相區(qū)介質在溫度為900℃時對碳化硅材料的侵蝕行為。 分別用光學顯微鏡和掃描電鏡觀察了試樣在熔液區(qū)域的橫截面以及試樣與三相區(qū)的界面形貌。 研究結果表明：碳化硅材料在熔融的冰晶石混合介質中表現(xiàn)出良好的抗腐蝕性能； 鋁液對碳化硅材料有侵蝕作用， 而電解質、 空氣界面對碳化硅有較強的腐蝕行為。 分析和探討了各相介質對碳化硅材料的腐蝕機理以及腐蝕產(chǎn)物的相組成。
關鍵字: 碳化硅； 冰晶石； 腐蝕
（1. State Key Laboratory of Mechanical Behavior of Materials,
Xi′an Jiaotong University, Xi′an 710049, China;
2. School of Materials Science and Engineering,
Xi′an University of Technology, Xi′an 710048, China）
Abstract:The corrosion behavior of silicon carbide materials in three phase zones of atmosphere, electrolyte, molten aluminium was investigated at 900℃. The specimen microstructures of cross section in the molten phases were observed by optical microscopy, and the interfacial morphology between sample and each phase was identified by SEM. The results indicate that, silicon carbide materials characterize good corrosion resistance at cryolite solution; molten aluminium can corrode silicon carbide, and the sample at atmosphere, electrolyte interface is corroded badly. The corrosive mechanism of different medium on silicon carbide materials and the phases constitute of corrosively formed materials were analyzed.
Key words: silicon carbide; cryolite; corrosion
