Air oxidation of binary Ni-Dy alloys at 923-1023K and lithiation in molten (0.62Li, 0.38K)(2)CO3 at 923K

IMR OpenIR

	Air oxidation of binary Ni-Dy alloys at 923-1023K and lithiation in molten (0.62Li, 0.38K)(2)CO3 at 923K
	Z. P. Liu; P. Y. Guo; C. L. Zeng
	2006
发表期刊	High Temperature Materials and Processes
ISSN	0334-6455
卷号	25 期号:4 页码:217-224
摘要	In order to decrease the solubility of NiO cathode of molten carbonate fuel cell (MCFC) and develop materials and coatings for separators in the cathode side of MCFC, dysprosium was introduced to modify nickel. In present paper, binary Ni-Dy alloys containing 1, 3 and 5 mass%Dy respectively were prepared. The alloys are two-phase composed of a nickel solid solution and an intermetallic phase Ni17Dy2. The oxidation behavior of the alloys at 923-1023K in air was evaluated by thermogravimetric tests coupled with some physical analysis techniques. The samples pre-oxidized at 923K for 100h were then immersed in molten (0.62Li,0.38K)(2)CO3 at 923K to examine the effect of Dy on the lithiation of NiO in the melt. The results indicated that the addition of dysprosium to nickel increased its oxidation rate, except for Ni-1Dy at 1023K. The scales formed on the alloys were composed of NiO with a trace of DY2O3. The lithiation of NiO in molten (Li,K)(2)CO3 could be favored by the addition of dysprosium. For comparison, binary Ni-Y alloys were also examined. The effect of yttrium on the air oxidation and molten (Li,K)(2)CO3 corrosion of nickel was similar to dysprosium, except that the Y-containing precipitates in Ni-Y alloys underwent very fast preferential corrosion while the Dy-containing intermetallic phases in Ni-Dy alloys not.
部门归属	chinese acad sci, met res inst, state key lab corros & protect, shenyang 110016, peoples r china.;liu, zp (reprint author), chinese acad sci, met res inst, state key lab corros & protect, 62 wencui rd, shenyang 110016, peoples r china,peoples r china
关键词	Molten Carbonate Fuel Cell Ni-dy Alloys Oxidation Molten Carbonates Lithiation Fe-20cr Alloys Behavior 600-800-degrees-c Coatings
URL	查看原文
WOS记录号	WOS:000244099000006
引用统计	被引频次：2[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/321006/34375
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. P. Liu,P. Y. Guo,C. L. Zeng. Air oxidation of binary Ni-Dy alloys at 923-1023K and lithiation in molten (0.62Li, 0.38K)(2)CO3 at 923K[J]. High Temperature Materials and Processes,2006,25(4):217-224.
APA	Z. P. Liu,P. Y. Guo,&C. L. Zeng.(2006).Air oxidation of binary Ni-Dy alloys at 923-1023K and lithiation in molten (0.62Li, 0.38K)(2)CO3 at 923K.High Temperature Materials and Processes,25(4),217-224.
MLA	Z. P. Liu,et al."Air oxidation of binary Ni-Dy alloys at 923-1023K and lithiation in molten (0.62Li, 0.38K)(2)CO3 at 923K".High Temperature Materials and Processes 25.4(2006):217-224.