摘要
利用场发射扫描电子显微镜(FE-SEM)、能谱仪(EDS)、X射线光电子能谱(XPS)、二次离子质谱(SIMS)等分析手段,研究温度对镍基高温合金GH4169粉末表面氧化特性的影响。结果表明:室温条件下,GH4169高温合金粉末表面部分氧化,表面存在以Ni、Cr、Ti、Nb为主的单质态和以Ni(OH)2、Cr2O3、TiO2、Nb2O5为主的氢氧化物/氧化物;随着温度的升高(150~250℃),Ni、Cr、Ti、Nb元素XPS单质峰减弱,氧化程度略有增加,粉末表面部分氧化;当温度达到350℃时,Ni、Cr、Ti、Nb元素XPS单质峰几乎全部消失,粉末表面全部氧化,氧化层厚度约为5 nm,主要由Ni(OH)2、Cr2O3、TiO2、Nb2O5组成;温度对GH4169高温合金粉末氧化特性影响显著,对本研究所用的GH4169高温合金粉末暴露大气条件下1 h内,最高处理温度不应超过250℃。
The effect of temperature on surface oxidation characteristics of nickel-base superalloy GH4169 powder was investigated by field emission scanning electron microscope(FE-SEM),energy-dispersive spectroscopy(EDS),X-ray photoelectron spectroscopy(XPS)and secondary ion mass spectrometry(SIMS).The results show that the surface of the GH4169 superalloy powder is partially oxidized at room temperature(RT),and on the surface there are elemental states dominated by Ni,Cr,Ti and Nb,and hydroxide/oxide dominated by Ni(OH)2,Cr2O3,TiO2 and Nb2O5。With the temperature increasing(150~250°C),the peaks of Ni,Cr,Ti and Nb elements become weaker,the degree of oxidation is slightly increased and the surface of powder is partially oxidized.When the temperature reaches to 350°C,the peaks of Ni,Cr,Ti,and Nb elements are all disappeared,and the surface of powder is fully oxidized.The oxide layer thickness is about 5 nm,and is mainly composed of Ni(OH)2,Cr2O3,TiO2and Nb2O5.The effect of temperature on oxidation characteristics of the GH4169 superalloy powder is significant,and the maximum treatment temperature of the GH4169 superalloy powder used for this study is no more than 250°C exposed within 1 h under atmospheric conditions.
作者
张利冲
许文勇
李周
王双喜
沈建锟
郑亮
张国庆
Zhang Lichong;Xu Wenyong;Li Zhou;Wang Shuangxi;Shen Jiankun;Zheng Liang;Zhang Guoqing(AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China;Science and Technology on Advanced High Temperature Structural Materials Laboratory,Beijing 100095,China)
出处
《航空材料学报》
EI
CAS
CSCD
北大核心
2020年第6期1-7,共7页
Journal of Aeronautical Materials
基金
国家重点研发计划资助项目(2017YFB0305800)。
关键词
温度
镍基高温合金
表面氧化特性
氧化层
temperature
nickel-base superalloy
surface oxidation characteristics
oxide layer
