The oxidation of a Co-15 wt% Ce alloy under low oxygen pressures at 600-800 degrees C

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	The oxidation of a Co-15 wt% Ce alloy under low oxygen pressures at 600-800 degrees C
	G. Y. Fu; Y. Niu; W. T. Wu; F. Gesmundo
	1998
发表期刊	Corrosion Science
ISSN	0010-938X
卷号	40 期号:7 页码:1215-1228
摘要	The scaling of pure cerium and of a cobalt-base alloy contain:ng approximately 15 wt% cerium was studied at 600-800 degrees C in H-2-CO2 mixtures providing at equilibrium an oxygen pressure of 10(-24) atm at 600 degrees C and of 10(-20) atm at 700 and 800 degrees C. Scaling of Co-15Ce formed internal oxidation region where the Ce-rich phase produced a mixture of cobalt metal and cerium oxide. The kinetics of internal oxidation were very much faster than calculated from the known values of the diffusivity/solubility of oxygen in pure cobalt. The microstructure of the internal oxidation region followed closely that of the original alloy, while cerium was not depleted in the alloy. At 700 and 800 degrees C a thin outermost layer of pure cobalt metal was also produced. These results are examined by considering the low solubility of cerium in cobalt and the presence of intermetallic compounds in the alloy. (C) 1998 Elsevier Science Ltd. All rights reserved
部门归属	cas, inst corros & protect met, state key lab corros & protect, shenyang 110015, peoples r china. shenyang inst chem technol, shenyang 110021, peoples r china. univ genoa, fac ingn, ist chim, i-16129 genoa, italy.;fu, gy (reprint author), cas, inst corros & protect met, state key lab corros & protect, wencui rd 62, shenyang 110015, peoples r china
关键词	Cobalt Cerium Alloys Oxidation Internal Attack 2-phase Binary-alloys High-temperature Oxidation Most-reactive Component Possible Scaling Modes Low Oxidant Pressures Internal Oxidation Corrosion
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WOS记录号	WOS:000075306400013
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/37657
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	G. Y. Fu,Y. Niu,W. T. Wu,et al. The oxidation of a Co-15 wt% Ce alloy under low oxygen pressures at 600-800 degrees C[J]. Corrosion Science,1998,40(7):1215-1228.
APA	G. Y. Fu,Y. Niu,W. T. Wu,&F. Gesmundo.(1998).The oxidation of a Co-15 wt% Ce alloy under low oxygen pressures at 600-800 degrees C.Corrosion Science,40(7),1215-1228.
MLA	G. Y. Fu,et al."The oxidation of a Co-15 wt% Ce alloy under low oxygen pressures at 600-800 degrees C".Corrosion Science 40.7(1998):1215-1228.