Ti_3SiC_2在 900℃与1000℃下的热腐蚀行为  

HOT CORROSION OF Ti_3SiC_2-BASED CERAMIC IN MOLTEN Na_2SO_4 AT 900 ℃AND 1000 ℃

作　　者：刘光明[1] 李美栓[1] 周延春[1] 张亚明[1] 

机构地区：[1]中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳110016

出　　处：《金属学报》2002年第4期417-420,共4页Acta Metallurgica Sinica

基　　金：国家杰出青年科学基金资助项目59925208~~

摘　　要：研究了 Ｔｉ３ＳｉＣ２三元层状陶瓷材料在 ９００和 １０００℃下由 Ｎａ２ＳＯ４盐膜引起的热腐蚀行为 用 ＸＲＤ及 ＳＥＭ分析了腐蚀产物膜的成分、结构和形貌等，实验表明、腐蚀膜由 ＴｉＯ２和 ＳｉＯ２混合组成：在结构上明显地分成两层．外层晶粒粗大且多孔．内层晶粒细小且致密 Ｔｉ３ＳｉＣ２与熔融盐接触时遭受较严重的腐蚀。The hot corrosion behaviors of polycrystalline bulk samples of Ti3SiC2 coated with Na2SO4 film were studied at 900 ℃ and 1000 ℃ in air. The surface morphology, structure and composition of scales were investigated by SEM/EDS and XRD. It was shown that Ti3SiC2 suffered from serious hot corrosion at 900℃and 1000 ℃. The oxide scales have a duplex structure. The outer layer consists of coarse grains with many pores, while the inner layer consists of fine grain and is compact. The mixtures of TiO2 and SiO2 formed during the hot corrosion are different from those of Ti3SiC2 oxidized in air.

关 键 词：TI3SIC2 热腐蚀 氧化膜 三元层状陶瓷 

分 类 号：TG148[一般工业技术—材料科学与工程] TG172[金属学及工艺—金属材料]