金属学报  1987, Vol. 23 Issue (2): 198-205

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Ta-Ni和Nb-Ni的熔盐电化学表面合金化及合金性质的研究

乔芝郁;PieereTaxil

北京钢铁学院;法国Paul;Sabatier大学

ELECTROCHEMICALLY SURFACE ALLOYING ON Ni WITH Ta AND Nb IN MOLTEN FLUORIDES AND PROPERTIES OF Ta-Ni AND Nb-Ni ALLOYS

by QIAO Zhiyu(Beijing University of Iron and Steel Technology); Pieere TAXIL (Universite Paul Sabatier; Toulouse; France)(Manuscript received 9 January; 1986; revised manuscript 3 July; 1986)

乔芝郁;PieereTaxil. Ta-Ni和Nb-Ni的熔盐电化学表面合金化及合金性质的研究[J]. 金属学报, 1987, 23(2): 198-205.
, . ELECTROCHEMICALLY SURFACE ALLOYING ON Ni WITH Ta AND Nb IN MOLTEN FLUORIDES AND PROPERTIES OF Ta-Ni AND Nb-Ni ALLOYS[J]. Acta Metall Sin, 1987, 23(2): 198-205.

摘要 参考文献 相关文章 Metrics 全文: PDF(612 KB)   摘要: 在850—1050℃含有Ta或Nb离子的氟化物熔盐中,用电化学表面合金化的方法制备了Ta-Ni和Nb-Ni二元合金,分析表明合金层的成分是均匀的TaNi_3和NbNi_3化合物.利用恒电流间隙滴定技术(Galvanostatic Intermittent Titration Technique)证实了Ta-Ni二元系存在Ta_2Ni,TaNi,TaNi_2和TaNi_3四种化合物,测定了其生成电位和自由能;Nb-Ni二元系仅生成、NbNi和NbNi_3二种化合物.在熔盐电化学表面合金化的过程中,表面合金层的厚度与时间呈抛物线关系.测定了Ta-Ni和Nb-Ni合金中Ta和Nb的扩散系数,并建立了扩散系数随温度变化的Arrhenius方程 Abstract：The electrochemically alloying on Ni surface with Ta and Nb was carried out In molten LiF-NaF-K_2TaF_7 or LiF-NaF-K_2NbF_7 at temperatures between 850 and 1050℃. In both cases only TaNi_3 and NbNi_3 stable phases are detected in the bulk of the layer. The intermetallic compounds of Ta-Ni binary system, including Ta_2Ni, TaNi, TaNi_2 and TaNi_3 have been identified and the Gibbs energy of formation of Ta-Ni compounds have been calculated. It is shown that the growth of the surface alloying layer follows a parabolic law versus the alloying time. The kinetic parameters of the intermetallic diffusion of Ta-Ni and Nb-Ni systems, including the dimensionless parameters which depends on the solid compositions at the boundary of the alloy layer and the intermetallic diffusion coefficients D have been estimated by combination of electrochemical measurements and diffusion equation. The following equations are confirmed: x~2=Kt and α=(K/D)~(1/2) where x is the thickness of the surface layer and K is the constant. 收稿日期: 1987-02-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 乔芝郁 PieereTaxil 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1987/V23/I2/198 1 Taxil P, Qiao Zhiyu. J Appl Electrochem 1985; 15: 947 2 Taxil P, Qiao Zhiyu. Electrochem Soc 168th Fall Meeting Extended Abstr., Las Vegas, Nevada 85-2, 1985, 746 3 乔芝郁,在法国保尔沙巴基埃的研究报告,1984 4 Cook N C. Sci Am, 1964; 221: 38 5 Cook N C. Presented at NATO Advanced Study Institute Conference "The Science and Technology of Surface Coatings" Imperial College of Science and Technology, London, 1972 6 Weppner W, Huggins R A. Proc. on the Symp. on Electrode Materials and Process for Energy Conversion and Storage. New York: Electrochemical Society, 1977, 833 7 Weppner W, Huggins R A. J Electrochem Soc. 1977; 124: 1569 8 Weppner W, Huggins R A. J Electrochem Soc. 1978; 125: 7 9 Wen G J, Weppner W, et al. J Electrochem Soc, 1979; 126: 2258 10 Mottot Y. Doct. Etat Thesis, Paris, 1985 11 Qiao Zhiyu, Taxil P. J Appl Electrochem, 1985; 15: 259 12 Taxil P, Mahenc J. Corros Sci, 1981; 21: 31 13 Cohen U. PhD Dissertation, Stanford University, 1977 14 Taxil P. J Less-Common Met, 1985; 113: 89 15 #12 16 #12 17 Danckwerts P V. Trans Faraday Soc 1950; 46: 701 18 Jost W. Diffusion in Solids, Liquids and Gases. New York: Academic Press, 1960, 72 No related articles found! Viewed Full text Abstract Cited   Shared      Discussed