纳米晶304不锈钢高温氧化膜中氧元素的XPS研究

利用X-射线光电子谱(XPS)研究普通304不锈钢(CP-SS304)和用深度轧制技术制备块体的纳米晶304不锈钢(BN-SS304)在900℃空气中氧化24h形成氧化膜中氧元素的结合能和原子百分比.BN-SS304和CP-SS304氧化膜表面氧元素以分子态(O0)和离子态(O2-)存在；BN-SS304和CP-SS304氧化膜中O0和O2-的结合能相同；Ar+溅射400s时不存在分子氧,而CP-SS304氧化膜溅射800s时不存在分子氧；从溅射开始至溅射800s,BN-SS304氧化膜中O2-与(O2-+O0)原子数的比值大于CP-SS304,最大差距为8.92％.结果表明,BN-SS304氧化膜表面吸附O2深度较低；BN-SS304氧化膜致密性更好.

The XPS Characterization of Oxygen on Oxidation Film of Bulk Nanocrystalline 304 Stainless at High Temperature

Studied the atomic percentages and binding energies of oxyen on the oxide films of conventional polycrystalline 304 stainless steel(CP-304) and bulk nanocrystalline 304 stainless steel(BN-SS304) prepared by severe rolling technique at 900℃ for 24h by X-ray photoelectron spectroscopy(XPS).There were molecular state(O0) and ion state(O2-) on the oxide films of BN-SS304 and CP-SS304,the binding energy of O0 and O2-on the oxide film of BN-SS304 was the same with that of CP-SS304,there was noO2on the oxide film of BN-SS304 after Ar+ sputtering for 400s,but there was noO2on the oxide film of CP-SS304 after Ar+ sputtering for 800s.The atomic percentage ratio of O2-to(O2-+ O0) on the oxide film of BN-SS304 was bigger than that of CP-SS304 after Ar+ sputtering for 800s.The results demonstrate that,the depth of O2on the oxide film of BN-SS304 was smaller than it of CP-SS304;the oxide film on BN-SS304 was more compact than that of CP-SS304.