Y2O3对渗Al—Si涂层抗氧化性能的影响  

Effect of Y2O3 on oxidation behavior of Al-Si coating

作　　者：龚珍奇[1] 娄瑾[2] 

机构地区：[1]江西科技师范学院应用化学系,江西南昌330013 [2]江西科技师范学院江西省材料表面工程重点实验室,江西南昌330013

出　　处：《功能材料》2007年第A10期3886-3888,共3页Journal of Functional Materials

摘　　要：用无机盐料浆法在镍基高温合金K4104表面制备了渗Al-Si涂层并在制备过程中添加了Y2O3。采用静态氧化增重的试验方法对涂层进行了1000℃×200h抗氧化性试验,用带能谱分析的扫描电镜观察涂层氧化不同时间后的表面形貌和截面形貌及分析涂层的氧化膜和截面成分。用origin软件绘制氧化动力学曲线并拟合出氧化动力学方程。研究结果表明，渗Al-Si具有较好的抗高温氧化性能。Y2O3的添加提高了渗Al-Si涂层的抗氧化性能，提高了渗Al-Si涂层的塑性，改善了氧化膜与涂层间的粘附性。Al-Si coating and Al-Si coating with Y2O3 were prepared on nicle-base superalloy K4104 by slurry process. High temperature oxidation resistance of Al-Si coatings were studied by high temperature test at 1000℃ for 200h in static air. Morphology of oxide scales and cross section was obtained.It is found that Al-Si coatings have great high temperature oxidation resistance. Y2O3 can increase the oxidation resistance of Al-Si coatings, and it improves the plasticity and adherence of scales.

关 键 词：Y2O3 AL-SI涂层 高温氧化 

分 类 号：TG174.45[金属学及工艺—金属表面处理]