Electro-deposition of tantalum on tungsten and nickel in LiF-NaF-CaF melt containing KTaF; Electrochemical study

Mehmood, M.*; Kawaguchi, Nobuaki*; Maekawa, Hideki*; Sato, Yuzuru*; Yamamura, Tsutomu*; Kawai, Masayoshi*; Kikuchi, Kenji

Materials Transactions, 44(2), p.259 - 267, 2003/02

https://doi.org/10.2320/matertrans.44.259

Electrochemical study has been carried out on the electro-deposition of tantalum in LiF-NaF-CaF melt containing KTaF at 700C. This has been done for determining the mechanistic features for preparing electrolytic coating of tantalum on nickel and tungsten substrates. Electro-deposition of metallic tantalum occurs primarily by electro-reduction of Ta(V). Pure metallic tantalum without any entrapped salt is successfully deposited on tungsten by galvanostatic polarization at reasonably low current densities. An additional feature on nickel is the formation of an intermetallic compound at potential 0.25V nobler than that of pure tantalum as a result of underpotential deposition of tantalum. This intermetallic compound covers the surface within a short time followed by deposition of pure tantalum, although intermetallic compound keeps growing at the interface of pure tantalum deposit and the substrate as a result of diffusion.

Self-diffusion of alkaline and fluorine ions in molten alkali fuoride-beryllium fluoride mixture

*; ; Katsuta, Hiroji; Furukawa, Kazuo

Nihon Kagakkai-Shi, 6, p.956 - 960, 1982/00

no abstracts in English

Conversion of color centers in NaF during proton bombardment at temperature above RT

Journal of the Physical Society of Japan, 38(1), P. 288, 1975/01

no abstracts in English

Defect formation by N ion bombardment in LiF and NaF

; Kazumata, Y.;

Journal of the Physical Society of Japan, 34(6), p.1536 - 1540, 1973/06

https://doi.org/10.1143/JPSJ.34.1536

no abstracts in English

Identification of Dislocations in NaF Crystals by Electrolytic Coloration and Chemical Etching

Journal of the Physical Society of Japan, 26(1), p.143 - 148, 1969/01

https://doi.org/10.1143/JPSJ.26.143

no abstracts in English

Mechanical bleaching and reorientation of color centers in NaF

*; *; Ozawa, K.; TOKUO.SUITA*

Physica Status Solidi, 31, p.K117 - K118, 1969/00

no abstracts in English

R and N centers in NaF crystals irradiated with protons at liquid nitrogen temperature

Ozawa, K.; *

Phys.Lett., 27A(7), p.443 - 444, 1968/00

no abstracts in English

Dislocation networks formed by electrolysis in NaF crystal

Journal of the Physical Society of Japan, 21(10), p.2095 - 2096, 1966/00

https://doi.org/10.1143/JPSJ.21.2095

no abstracts in English