Electrochemical synthesis of protective coatings of refractory compounds of group IVa–VIa metals from ionic melts

2007 ◽  
Vol 48 (3) ◽  
pp. 177-183 ◽  
Author(s):  
V. V. Malyshev
Keyword(s):  
Electrochemical Synthesis ◽  
Protective Coatings ◽  
Refractory Compounds ◽  
Ionic Melts ◽  
Group Iva

High Temperature Ionic Liquids Electrosynthesis of Mo2C Protective Coatings on Diamond, Boron Nitride, Silicon and Boron Carbide

2018 ◽  
Vol 69 (3) ◽  
pp. 544-548 ◽  
Author(s):  
Victor Malyshev ◽  
Angelina Gab ◽  
Dimitri Shakhnin ◽  
Cristina Donath ◽  
Elena Ionela Neacsu ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
High Temperature ◽  
Boron Nitride ◽  
Boron Carbide ◽  
Thermodynamic Analysis ◽  
Electrochemical Behavior ◽  
Electrochemical Synthesis ◽  
Molybdenum Carbide ◽  
Protective Coatings ◽  
Ionic Melts

On the basis of the thermodynamic analysis of the reactions of dielectrics and semiconductors with ionic melts, the systems suitable for an electrochemical synthesis from high temperature ionic liquids of films consisting in molybdenum carbide on the surfaces of these materials were selected. Then, the study of their electrochemical behavior was performed.

Electrochemical Synthesis of Niobium-Hafnium Coatings in Molten Salts

2007 ◽  
Vol 62 (7-8) ◽  
pp. 425-430 ◽  
Author(s):  
Sergey A. Kuznetsov ◽  
Svetlana V. Kuznetsova
Keyword(s):  
Heat Resistance ◽  
Molten Salt ◽  
Current Density ◽  
Electrochemical Synthesis ◽  
Molten Salts ◽  
Protective Coatings ◽  
Limiting Current ◽  
Surface Alloying ◽  
Limiting Current Density ◽  
Salt Systems

Graphite is widely used in technology because of its unique properties. A drawback of graphite is its low heat resistance in oxidizing atmospheres. To increase its heat resistance, Nb-Hf protective coatings were synthesized. Electrodeposition of niobium coatings on graphite with subsequent precise surface alloying of niobium with hafnium was studied. Electrochemical synthesis of Nb-Hf coatings from molten salt systems containing compounds of niobium and hafnium was used too. It was shown that Nb-Hf coatings with a planar growing front can be obtained if the concentration and therefore the limiting current density of the more electropositive component Nb is kept low. Nb-Hf coatings with a thickness of 20 - 30 μm have been obtained in this way from an NaCl-KCl-K2NbF7 (1 wt%)-K2HfF6 (10 wt%)-NaF (5 wt%) melt, above the limiting current density of niobium deposition.

ChemInform Abstract: High-Temperature Electrochemical Synthesis of Tungsten and Molybdenum Borides in Ionic Melts.

ChemInform ◽  
2010 ◽  
Vol 23 (40) ◽  
pp. no-no
Author(s):  
KH. B. KUSHKHOV ◽  
V. V. MALYSHEV ◽  
A. A. TISHCHENKO ◽  
V. I. SHAPOVAL
Keyword(s):  
High Temperature ◽  
Electrochemical Synthesis ◽  
Ionic Melts
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