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AP-FIM INVESTIGATION OF THE INITIAL-STAGE OF OXIDATION ON THE SURFACE OF ALLOYS
REN, DG
通讯作者REN, DG()
1995-04-01
发表期刊SURFACE REVIEW AND LETTERS
ISSN0218-625X
卷号2期号:2页码:177-181
摘要This,paper reports a study of the initial stage of oxidation on the surface of alloys by field-ion microscopy and atom probe (AP-FIM). The samples used in this investigation contained Ni, Ni-Cr, Ni-Al, Ti-Al, and Pt-Rh metals and alloys. A clean-tip surface, after atom-probe analysis, was exposed in the atmosphere of residual oxygen (vacuum 10(-4) torr) for a few hours. AP analysis found that a small quantity of oxygen was adsorbed on the surface of the alloys. The clusters of a combination of a metal atom with an oxygen, i.e., PtO+2, NiO+2, and TiO+2 were determined by AP. The experiment found that the binding energy between metal atom on the surface of alloys was reduced when oxygen was adsorbed on the surface. The binding energy of surface atoms was determined according to the field strength of the tip surface. The reduction of the binding energy was about 0.5-2.0 eV, which changed following the exposure period in the atmosphere and depending on the kind of alloys used. The difference in field-ion image due to adsorption of oxygen was observed as compared to without the oxygen. The results of the experiment show that oxygen was absorbed on the ''clean surface'' of alloys. First the oxygen molecule was dissociated to oxygen atoms by the reaction with metal atoms and then formed the metal-oxygen bonding (M + O --> MO). This is an initial stage of oxidation on the surface of alloys. The clusters of combining oxygen did not dissociate during the field-evaporation process with 4.5 V/Angstrom field strength.
收录类别SCI
语种英语
WOS研究方向Chemistry ; Physics
WOS类目Chemistry, Physical ; Physics, Condensed Matter
WOS记录号WOS:A1995RD59100007
出版者WORLD SCIENTIFIC PUBL CO PTE LTD
引用统计
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/80699
通讯作者REN, DG
作者单位ACAD SINICA, INST MET RES, ATOM IMAGING SOLIDS LAB, WENHUA RD 72, SHENYANG 110015, PEOPLES R CHINA
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REN, DG. AP-FIM INVESTIGATION OF THE INITIAL-STAGE OF OXIDATION ON THE SURFACE OF ALLOYS[J]. SURFACE REVIEW AND LETTERS,1995,2(2):177-181.
APA REN, DG.(1995).AP-FIM INVESTIGATION OF THE INITIAL-STAGE OF OXIDATION ON THE SURFACE OF ALLOYS.SURFACE REVIEW AND LETTERS,2(2),177-181.
MLA REN, DG."AP-FIM INVESTIGATION OF THE INITIAL-STAGE OF OXIDATION ON THE SURFACE OF ALLOYS".SURFACE REVIEW AND LETTERS 2.2(1995):177-181.
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