紫铜表面渗铝层的高温抗氧化性能  

Oxidation Resistance of Aluminized Layer on Red Copper at Hight Temperature

作　　者：王国凡[1] 苗磊[1] 罗辉[1] 张维义[1] 

机构地区：[1]山东建筑大学材料科学与工程学院,山东济南250101

出　　处：《表面技术》2008年第3期19-21,共3页Surface Technology

基　　金：山东省自然科学基金资助项目(Y2005F18)

摘　　要：采用粉末包装法在紫铜表面渗铝。研究了紫铜和渗铝后的紫铜在空气中的高温氧化行为。用扫描电子显微镜(SEM)和X射线衍射仪(XRD)观察、分析了氧化膜的微观形貌和相组成,并讨论其氧化机理。结果表明:紫铜渗铝后不仅提高了高温抗氧化性能,而且氧化行为及其氧化层的结构也发生了变化。未渗铝的紫铜试样700℃氧化100 h后相组成为Cu2O和CuO,而渗铝后试样表面优先形成A l2O3氧化膜。氧化动力学曲线为抛物线型。Red copper was aluminized by means of pack cementation. The oxidation behavior of red copper and aluminized copper in air at high temperature was investigated. The micromorphology and phase composition of the formed oxide scales were examined by SEM and XRD, and the oxidation mechanism was discussed. The results indicate that the oxidation resistance of Cu is significantly improved by aluminizing treatment. The oxidation behavior and the structure of the oxide scale were changed after red copper was aluminized, too. After oxidation at 700℃ for 100h, the formed oxide scale on red copper consists of Cu2O9, CuO and that on aluminized Cu is mainly composed of Al2O3. The oxidation kinetic curves follow parabolic rate law.

关 键 词：紫铜 渗铝层 高温氧化 氧化铝膜 光学分析 

分 类 号：TQ174.758[化学工程—陶瓷工业] TB331[化学工程—硅酸盐工业]