The effects of 5 wt.-% Al and 10 wt.-% Al on the sulfidation behaviour of the Fe-25Cralloy in H<sub>2</sub>S-H<sub>2</sub> gas mixtures in the temperature range of 700～900 C has been studied.T...The effects of 5 wt.-% Al and 10 wt.-% Al on the sulfidation behaviour of the Fe-25Cralloy in H<sub>2</sub>S-H<sub>2</sub> gas mixtures in the temperature range of 700～900 C has been studied.Thesulfidation resistance of Fe-25Cr was improved and the sulfide scale morphologies,compositionand structure of Fe-25Cr changed remarkably.The sulfidation kinetics of the alloys with alu-minium obeyed basically the parabolic law after an initial period of reaction time.The sulfida-tion mechanism of the Fe-Cr-Al alloy has been proposed.展开更多
Structural and magnetic properties of Fe-25Cr-12Co-1Si alloy thermo-magnetically treated under different external magnetic field conditions were investigated. Orientation and morphology of the ferromagnetic α1 phase ...Structural and magnetic properties of Fe-25Cr-12Co-1Si alloy thermo-magnetically treated under different external magnetic field conditions were investigated. Orientation and morphology of the ferromagnetic α1 phase embedded in α2 phase matrix before and after step ageing are characterized by transmission electron microscope(TEM). The results show that the ellipsoidal particles of ferromagnetic α1 phase are aligned along the direction of external magnetic field during isothermal magnetic ageing. Approximately 28% of the total coercivity can be attributed to the shape anisotropy of α1 phase particles induced by external magnetic field for Fe-25Cr-12Co-1Si alloy thermo-magnetically treated with a parallel magnetic field.展开更多
基金Financially supported by the National Natural Science Foundation of China and the Chinese Corrosion Science Laboratory
文摘The effects of 5 wt.-% Al and 10 wt.-% Al on the sulfidation behaviour of the Fe-25Cralloy in H<sub>2</sub>S-H<sub>2</sub> gas mixtures in the temperature range of 700～900 C has been studied.Thesulfidation resistance of Fe-25Cr was improved and the sulfide scale morphologies,compositionand structure of Fe-25Cr changed remarkably.The sulfidation kinetics of the alloys with alu-minium obeyed basically the parabolic law after an initial period of reaction time.The sulfida-tion mechanism of the Fe-Cr-Al alloy has been proposed.
文摘Structural and magnetic properties of Fe-25Cr-12Co-1Si alloy thermo-magnetically treated under different external magnetic field conditions were investigated. Orientation and morphology of the ferromagnetic α1 phase embedded in α2 phase matrix before and after step ageing are characterized by transmission electron microscope(TEM). The results show that the ellipsoidal particles of ferromagnetic α1 phase are aligned along the direction of external magnetic field during isothermal magnetic ageing. Approximately 28% of the total coercivity can be attributed to the shape anisotropy of α1 phase particles induced by external magnetic field for Fe-25Cr-12Co-1Si alloy thermo-magnetically treated with a parallel magnetic field.
