微晶化及活性元素效应在合金抗高温氧化中的协同作用  

The synergetic effect of micro-crystallization and reactive effect on high temperature oxidation of alloys

作　　者：白凌云[1] 向军淮[1] 

机构地区：[1]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330038

出　　处：《功能材料》2007年第A10期3765-3768,共4页Journal of Functional Materials

基　　金：教育部科学研究基金重点资助项目（01052）

摘　　要：总结了目前广为研究的微晶化和活性元素效应在合金高温氧化过程中的作用，并讨论了二者的协同效应。微晶化和活性元素效应均能够降低合金的高温氧化速率，提高氧化膜的黏附性。然而，微晶化中晶粒的长大趋势和促进内氧化发生的缺陷对其实际应用造成不利影响，少量活性元素的添加恰好弥补微晶化的这些缺失；活性元素添加须适量，这点限制了它作为保护性氧化膜形核中心的数量及降低氧化速率的幅度，且使得合金氧化增重较未添加活性元素试样略有增加，微晶化则不存在这样的问题，可以弥补应用活性元素效应的不足之处。本工作旨在加深对微晶化和活性元素协同效应对合金高温氧化性能影响的微观理解，为制备性能更为优异的抗高温氧化合金提供理论和实践基础。The synergetic effect of micro-crystallization and reactive effect on high temperature oxidation were summarized in this letter. Both micro-crystallization and reactive effect can decrease the oxidation rate of the alloy and enhance the adhesion between the scale and the substrate. The growth of the nano-crystalline grains and the inner oxidation phenomenon in micro-crystallization process restrict its practical application, whereas little addition of reactive elements can solve this problem. The quantities of the reactive element must be in a little amount, which will restrict the quantities of nucleation sites and the extent of the decreasing in alloy oxidation. There were no such defaults in micro-crystallization process, so it can fetch up these limitations. The purpose for this letter is to understand the synergetic effect of micro-crystallization and reactive effect on high temperature oxidation deeply, which can give theoretical and practical base for the further work in preparing more excellent high temperature alloys.

关 键 词：微晶化 活性元素效应 高温氧化 协同作用 

分 类 号：TG146.3[一般工业技术—材料科学与工程] TG156.8[金属学及工艺—金属材料]