TA2表面等离子渗铌合金层在700～900℃的氧化行为  

Oxidation Behavior of Surface Plasma Niobium Alloying Layer on TA2 at 700～900 ℃

作　　者：王文波[1] 贺志勇[1] 王振霞[1] 刘小平[1] 徐重[1] 

机构地区：[1]太原理工大学,山西太原030024

出　　处：《稀有金属材料与工程》2014年第5期1105-1110,共6页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51071106);山西省自然科学基金(2011011020-3;2012011021-4)

摘　　要：采用双辉技术在TA2基体表面渗入铌形成结构致密、与基体形成冶金结合的钛铌合金层。结合XRD、SEM及EDS等手段分析渗铌和未渗铌TA2试样分别在700、800、900℃的高温氧化行为。实验结果表明:随着氧化温度的提高,氧化增重增加,渗铌比未渗铌的氧化增重降低,抗高温氧化性能改善,特别在900℃铌的作用明显;对渗铌和未渗铌TA2在900℃分别氧化20、40、100 h后氧化层的表面及截面进行分析,获得对合金层成分、结构、氧化性能之间关系的认识。钛铌合金层高温氧化后的氧化层是由三部分组成:外层是由高浓度合金层氧化而形成,其氧化产物主要是Nb2O5/TiO2,中间层主要由TiO2/TiO和Nb2O5组成,内层是分布着条状的富铌相。The high temperature oxidation of Ti-Nb alloy layer prepared by a double-glow technique was investigated. The oxidationbehavior of treated TA2 was analyzed at 700, 800 and 900 ℃ for 100 h in air by mean of XRD, SEM and EDS. The results show that theoxidation behavior of TA2 at 700-900 ℃ for 100 h is improved after niobium alloying process and the effect is more pronounced at 900℃. Cross-section morphology and composition of the treated TA2 after subjecting to oxidation for 20, 40 and 100 h at 900 ℃ werecharacterized using SEM and EDS. The upper layer is composed of the mixed oxides （Nb2O5/TiO2）, which are formed by the oxidationproduct of high concentration niobium alloyed layer; TiOJTiO/Nb205 exist in a compact intermediate layer, and the inner layer aredistributed with white stripe phase rich in niobium.

关 键 词：双辉技术 TA2 钛铌合金层 氧化行为 

分 类 号：TG174.4[金属学及工艺—金属表面处理]