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Surface segregation behaviors of amorphous Ni65Nb35 alloy under oxidation in O-2 at various temperatures
Song, Z; Tan, DL; He, F; Bao, XH
关键词Catalysis Amorphous Ni-nb Alloy Oxidation Segregation
刊名APPLIED SURFACE SCIENCE
1999
137期:1-4页:142-149
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter
研究领域[WOS]Chemistry ; Materials Science ; Physics
关键词[WOS]CARBON-MONOXIDE ; NIOBIC ACID ; ZR ALLOYS ; CATALYSTS ; HYDROGENATION
英文摘要Variations of surface morphology and chemical composition of amorphous Ni65Nb35 alloy after oxidation in 1 atm O-2 at temperatures from room temperature to 773 K have been investigated using scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (LES) depth profile methods. Inverse segregation behaviors have been observed at two oxidation temperature ranges. At the lower temperature range (less than or equal to 373 K), Nb segregates at the surface as Nb2O5; while at the higher temperature range (greater than or equal to 523 K), Ni segregates at the surface as metallic Ni and NiO. Different oxidation mechanisms have been suggested to operate in the two oxidation temperature ranges, which may be concerned with different oxidation rates of Nb and diffusion speeds of O and Ni ions in the Nb,O, layer at different temperatures. The affinities of Ni and Nb to oxygen may act as the driving force of the segregation. (C) 1999 Elsevier Science B.V. All rights reserved.
语种英语
WOS记录号WOS:000077925100019
引用统计
被引频次:15[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/138591
专题中国科学院大连化学物理研究所
作者单位1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Tianjin Univ, State Key Lab C1 Chem Engn, Tianjin 300072, Peoples R China
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GB/T 7714
Song, Z,Tan, DL,He, F,et al. Surface segregation behaviors of amorphous Ni65Nb35 alloy under oxidation in O-2 at various temperatures[J]. APPLIED SURFACE SCIENCE,1999,137(1-4):142-149.
APA Song, Z,Tan, DL,He, F,&Bao, XH.(1999).Surface segregation behaviors of amorphous Ni65Nb35 alloy under oxidation in O-2 at various temperatures.APPLIED SURFACE SCIENCE,137(1-4),142-149.
MLA Song, Z,et al."Surface segregation behaviors of amorphous Ni65Nb35 alloy under oxidation in O-2 at various temperatures".APPLIED SURFACE SCIENCE 137.1-4(1999):142-149.
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