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The oxidation of a Co-15 wt% yttrium alloy in 1 atm O-2 at 600-800 degrees C
Niu, Y; Li, YS; Gesmundo, F; Viani, F
Corresponding AuthorGesmundo, F()
2000-03-01
Source PublicationINTERMETALLICS
ISSN0966-9795
Volume8Issue:3Pages:293-298
AbstractThe oxidation of a cobalt-based alloy containing 15 wt% yttrium (Y) as well as of pure yttrium has been studied in I arm of pure oxygen at 600-800 degrees C. The alloy always corrodes faster than pure cobalt and follows the parabolic rate law only approximately, forming an external scale of cobalt oxide which in its inner section contains particles of yttrium oxide. Beneath the external scales, a region of internal oxidation of yttrium having a depth much larger than predicted using the known solubility and diffusivity of oxygen in pure cobalt is also present. This anomalous depth is attributed to enhanced oxygen diffusion in the alloy along preferential paths associated with the localized internal oxidation of yttrium. No yttrium depletion is observed in the alloy beneath the front of internal oxidation. The scaling behavior of this alloy is interpreted by taking into account the limited solubility of yttrium in cobalt and the presence of the intermetallic compound Co-17 Y-2. (C) 2000 Elsevier Science Ltd. All rights reserved.
Keywordrare-earth intermetallics oxidation corrosion
Indexed BySCI
Language英语
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000085404800015
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/110413
Collection中国科学院金属研究所
Corresponding AuthorGesmundo, F
Affiliation1.Univ Genoa, Dipartimento Ingn Chim & Proc, I-16129 Genoa, Italy
2.Inst Corros & Protect Met, State Key Lab Corros, Shenyang 10015, Peoples R China
Recommended Citation
GB/T 7714
Niu, Y,Li, YS,Gesmundo, F,et al. The oxidation of a Co-15 wt% yttrium alloy in 1 atm O-2 at 600-800 degrees C[J]. INTERMETALLICS,2000,8(3):293-298.
APA Niu, Y,Li, YS,Gesmundo, F,&Viani, F.(2000).The oxidation of a Co-15 wt% yttrium alloy in 1 atm O-2 at 600-800 degrees C.INTERMETALLICS,8(3),293-298.
MLA Niu, Y,et al."The oxidation of a Co-15 wt% yttrium alloy in 1 atm O-2 at 600-800 degrees C".INTERMETALLICS 8.3(2000):293-298.
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