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| THE OXIDATION BEHAVIORS OF Fe,Cr AND Ni in O2+-ION IMPLANTED SUS304 STAINLESS STEEL BY IN SITU SR-XPS Ⅰ.OXIDATION BEHAVIORS |
| Ying Li;; |
| 中国科学院金属研究所;金属腐蚀与防护国家重点实验室 |
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Abstract 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.
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Received: 02 November 1999
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Corresponding Authors:
Ying Li
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