Fe-24Mn-4Al-5Cr合金高温氧化表层结构分析  

Microstructural Development in Surface Region during Oxidation of Fe-24Mn-4Al-5Cr Alloy

作　　者：吴忠金[1] 朱雪梅[1] 王新建[1] 张彦生[1] 

机构地区：[1]大连交通大学材料科学与工程学院,辽宁大连116028

出　　处：《大连交通大学学报》2016年第2期104-106,共3页Journal of Dalian Jiaotong University

摘　　要：利用X射线衍射分析仪(XRD)、扫描电子显微镜(SEM)和电子探针显微分析仪(EPMA)分析Fe-24Mn-4Al-5Cr合金在700℃空气中循环氧化160 h后表面形成的氧化膜形貌、成分分布及组织结构.研究结果表明:Fe-24Mn-4Al-5Cr合金在700℃空气中循环氧化160 h后,氧化层分为两个成分区域,外氧化区和内氧化区;外氧化区主要为Mn2O3相,内氧化区为由于铝和锰的选择性氧化所产生的Al2O3和Mn Al2O4相.另外,由于锰的选择性氧化使氧化层与基体之间的γ-Fe相转变成了α-Fe相.The surface morphology,constituent and micro-structure of oxide scales formed on Fe-24Mn-4Al-5Cr alloy oxidized at 700 ℃ in air for 160 h were investigated by using XRD,scanning electron microscopy and electron probe. The oxide layers could be macroscopically classfied into two zones,the external and internal-oxide zones. The external-oxide zone is Mn2O3,while the internal oxides are identied as Al2O3 and Mn Al2O4 formed by the selective oxidation of manganese and aluminum. On the other hand,the matrix is transformed intoα phases by the selective oxidation of manganese.

关 键 词：Fe-24Mn-4Al-5Cr合金 高温氧化 锰选择性氧化 氧化诱发α-Fe相 

分 类 号：TG141[一般工业技术—材料科学与工程]