稀土元素对合金高温氧化的影响  

Effect of Rare Earth Elements on High Temperature Oxidation of Metals

作　　者：杨珍[1] 鲁金涛[1] 赵新宝[1] 严靖博[1] 尹宏飞[1] 党莹樱[1] 谷月峰[1] 

机构地区：[1]西安热工研究院有限公司,陕西西安710032

出　　处：《中国稀土学报》2014年第6期641-649,共9页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金项目(51301130)资助

摘　　要：研究表明在形成Cr2O3/Al2O3膜的合金内添加微量稀土元素,可促进Cr/Al的选择性氧化,改变Cr2O3/Al2O3膜的生长传质机制,降低氧化膜的生长速率并改善其粘附性,从而显著提高合金的抗高温氧化性能。然而,稀土元素对合金高温氧化行为的影响机制目前尚存争议。在系统归纳近年来前人研究成果的基础上,对已有稀土元素微观作用模型进行了总结,并从稀土元素对Cr2O3和Al2O3膜的生长传质机制和氧化膜及氧化膜与金属基体界面的物理、化学特性的影响等方面探讨了其作用机制。Adding minor amounts of rare earth elements （REs） could significantly improve the resistance of Cr203 or A1203 formed alloys to high-temperature oxidation, by enhancing the selective oxidation scale growth mechanism, reducing the scale growth rate and improving the scale adhesion. of Cr/A1, changing the However, the response mechanisms for such effect are still unclear. Based on the results of previous studies, this paper summarized and commented on the existing microscopic interaction models in alloys with minor REs and explored the mechanism from the perspecti the scale and the ve of the growth of the Cr203 and/or A1203 scale and the physical and/or chemistry properties of interface between the scale and the substrate alloy.

关 键 词：高温氧化 稀土元素效应 氧化膜 生长 粘附性 

分 类 号：TG172.82[金属学及工艺—金属表面处理]