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- W631972093 abstract "An experimental study was carried out on reactive diffusion in the Ni-RE (RE=Ce, Pr, Nd) binary alloy systems for providing fundamental knowledge of the reduction-diffusion (R-D) method to directly produce powders of nickel-rare earth compounds, RENi5, for use in hydrogen storage materials.Firstly, phase relations were investigated at temperatures above 1, 000 or 1, 100K and in a concentration range of nickel above 55mol%, using reactive diffusion and metallographic methods. The-following compounds were found in the process of reactive diffusion:(a) the Ni-Ce system-CeNi2, CeNi3, Ce2Ni7 and CeNi5 (b). the Ni-Pr system-PrNi2, PrNi3, Pr2Ni7 and PrNi5 (c) the Ni-Nd system-NdNi2, NdNi3, Nd2Ni7, NdNi4, NdNi5 and Nd2Ni15. The compounds of CeNi5, PrNi5 and NdNi5 presented solid solutions, and their solubility limits were determined by an EPMA analysis. The widest ranges of solubility were 82.0-86.4mol% Ni at 1, 488K, 81.7-85.4mol% Ni at 1, 558K and 82.4-86.5mol% Ni at 1, 573K in the Ni-Ce, Ni-Pr and Ni-Nd systems, respectively.Secondly, interdiffusion coefficients, D, of the PrNi5 and NdNi5 compounds were determined, using a diffusion couple of the Ni/Ni-RE melt, and were given asPrNi5: D/m2·s-1=1.61×10-9·exp (-61.3 kJ·mol-1/RT)(T=1, 423-1, 513K)NdNi5: D/m2·s-1=1.85×10-4·exp (-205kJ·mol-1/RT)(T=1, 443-1, 503K)" @default.
- W631972093 created "2016-06-24" @default.
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- W631972093 date "1994-01-01" @default.
- W631972093 modified "2023-09-23" @default.
- W631972093 title "Study on Reactive Diffusion in Ni-RE(RE=Ce,Pr,Nd) Binary Alloys." @default.
- W631972093 cites W135723347 @default.
- W631972093 doi "https://doi.org/10.2473/shigentosozai.110.95" @default.
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