利用同步辐射光电子能谱(SR-XPS)原位研究了经3 keV O2溅射的SUS 304不锈钢中Fe、Ni、Cr合金元素与氧离子的化学反应活性差异及一种金属元素间的相互作用规律。经低能氧离子溅射后，不锈钢表面形成了一薄层氧化物膜，元素Cr和Ni分别以Cr2O3和NiO形式存在；铁元素的氧化产物随离子溅射量的增加分别以FeO、FeO和Fe2O3共存、全部生成Fe2O3的形式存在。在SUS 304职不锈钢中，铬元素与氧离子的化合能力最强，铁元素次之，镍元素的化合能力较弱。同纯金属与氧离子的化合行为比较发现：三种金属元素合金化后，铁、铬元素与氧离子的化合能力提高，而镍元素的氧化速度降低。氧化过程中铁元素与镍元素间存在相互作用，只有当铁元素与氧离子反应生成Fe2O3后，镍元素才开始氧化。
The oxidation behavior of Fe,Cr and Ni in SUS304 stainless steel implated with 3 keV O2+ ions has been investigated by in situ synchrotron rasiation X-ray photonelectron spectrocsopy(SR-XPS).For comparision,the same experiments were carried out for the pure Fe, Cr and Ni metals.The oxide films of stainless steel and oure metals have also been observed by scanning tunneling microscope (STM).It was found that the oxidized species of Cr and Ni in SUS304 changed from FeO to Fe2O3 with the increase of the doses of O2+.The oxidation rates of Fe and Cr in SUS304 were faster than those in respective pure metals,while the oxidation rate of Ni in sus304 was lower than thatin pure Ni.NiO layer was not formed on SUS304 until Fe2O3 appeared, which suggests that Fe2O3 has a special effect on the basis of the results of STM and SR-XPS.
参考文献
| [1] |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%