CAJ | 학술논문

利用热重分析法、X射线衍射仪和扫描电镜与能谱分析仪研究了Inconel 740合金在空气和含有水蒸气的空气中的高温氧化行为,并分析了该合金的氧化机制.结果表明：Inconel 740合金在950℃的静态空气中氧化时,氧化动力学遵循抛物线规律,氧化膜黏附性能良好,表面氧化膜完整,外层由Cr2O3和少量的（Ni,Co）Cr2O4、TiO2组成,中间层为SiO2和Al2O3,内层氧化物为Al2O3和TiO2;合金在750℃含有10%水蒸气的空气中的腐蚀动力学也近似遵从抛物线规律,表面氧化膜很薄且致密性较差,表面氧化层主要为Cr2O3,内层氧化物为Al2O3和TiO2.
이용열중분석법、X사선연사의화소묘전경여능보분석의연구료Inconel 740합금재공기화함유수증기적공기중적고온양화행위,병분석료해합금적양화궤제.결과표명：Inconel 740합금재950℃적정태공기중양화시,양화동역학준순포물선규률,양화막점부성능량호,표면양화막완정,외층유Cr2O3화소량적（Ni,Co）Cr2O4、TiO2조성,중간층위SiO2화Al2O3,내층양화물위Al2O3화TiO2;합금재750℃함유10%수증기적공기중적부식동역학야근사준종포물선규률,표면양화막흔박차치밀성교차,표면양화층주요위Cr2O3,내층양화물위Al2O3화TiO2.
By means of TGA,XRD,SEM and EDX,high temperature oxidation behavior of nickel base superalloy,Inconel 740,was investigated in static air or air-steam mixture,while its oxidation mechanism analyzed.Results indicate that the oxidation kinetic curve of Alloy 740 at 950 ℃ in static air obeys the parabolic rate law;the oxidation film is adhesive and compact;the surface layer consists of Cr2O3 mainly and small amount of（Ni,Co）Cr2O4 and TiO2;the medium layer is made up of SiO2 and Al2O3,and the internal layer consists of TiO2 and Al2O3.The oxidation kinetic curve of the alloy at 750 ℃ in air with 10 % water vapor also obeys the parabolic rate law;the oxidation film is thin and poor;the surface layer is mainly composed of Cr2O3 and the internal oxides are Al2O3 and TiO2.