一种含Ti镍基合金在950℃的恒温氧化行为  

Isothermal Oxidation Behaviour of a Ni-base Alloy Containing Titanium at 950 ℃

作　　者：卢旭东[1] 郭策安[1,2,3] 阎明[4] 郝清伟[1] 王杰[1] 马树武[1] 

机构地区：[1]沈阳理工大学装备工程学院,辽宁沈阳110159 [2]东北大学材料与冶金学院,辽宁沈阳110023 [3]中国科学院金属研究所,辽宁沈阳110016 [4]中国兵器工业集团北方华安工业集团有限公司,黑龙江齐齐哈尔161046

出　　处：《沈阳理工大学学报》2011年第5期72-75,90,共5页Journal of Shenyang Ligong University

摘　　要：用热重分析法测定了氧化动力学曲线,并采用XRD和SEM/EDAX等手段,研究了一种镍基合金950℃的高温氧化行为。结果表明,在950℃氧化初期,合金的氧化质量增重较快,随着氧化时间延长,氧化质量增加的速率逐渐降低,氧化动力学曲线符合抛物线规律,氧化膜出现少量剥落。合金表面氧化膜由三层组成,外氧化层为TiO2,中间层氧化物为Cr2O3、NiCr2O4、CrTiO3和NiAl2O4,内氧化层氧化物为Al2O3.The oxidation behaviour of the superalloy at 950℃ in air has been investigated by means of measuring the kinetics curves of the oxidation and analysis using SEM, XRD and EDAX. Results show that the initial oxidation rate is large, and the rate of mass gaining decreases gradually with time extending, the oxidation kinetics obeys parabolic law. A small amount of oxide scale spallation happens in the course of oxidation at 950℃. After oxidized at 950℃, three oxide layers form on the alloy including the outer consists of TiO2, middle consists of NiCr2O4, CrTiO3 and NiAl2O4 phases, and internal oxidizing layers is identified as A1203 phase.

关 键 词：镍基合金 高温氧化 氧化动力学 内氧化 

分 类 号：TG132[一般工业技术—材料科学与工程]