Electrodeposition and characterization of niobium from fused-fluoride electrolytes. Final technical report

Technical Report · Sat Feb 01 04:00:00 EST 1986

OSTI ID:5701345

Capsimalis, G P; Chen, E S; Peterson, R E; Ahmad, I

The electrodeposition of niobium from a binary electrolyte consisting of KF and NaF was characterized and compared with the ternary electrolyte of LiF, NaF, and KF. The deposition experiments were conducted at current densities between 5 and 35 mA/cm to the 2nd power and electrolyte temperatures between 725 and 800 C. DTZ measurements indicated the melting points to be 450 and 710 C for the ternary and binary electrolytes with added K/sub 2/NbF/sub 7/; however, it was necessary to operate both electrolytes above 725 C to obtain dense coherent deposits. Coating morphology was described by optical and scanning electron microscopy (SEM) morphology, while coating structure and properties were characterized by x-ray-diffraction analysis. In particular, a series of diffraction measurements were reported to describe the changes in the microstructure of the deposited material as a function of the preparation conditions.

• Research Organization: Army Armament Research and Development Center, Watervliet, NY (USA). Close Combat Armaments Center
• OSTI ID: 5701345
• Report Number(s): AD-A-166668/4/XAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
360105 -- Metals & Alloys-- Corrosion & Erosion
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400 -- Electrochemistry
COATINGS
CRYSTAL STRUCTURE
DEPOSITION
ELECTRODEPOSITION
ELECTROLYSIS
ELECTROLYTES
ELECTRON MICROSCOPY
ELEMENTS
LYSIS
METALS
MICROSCOPY
MICROSTRUCTURE
NIOBIUM
PROTECTIVE COATINGS
SURFACE COATING
TRANSITION ELEMENTS