Heat Resistance of Nanocrystalline Powders, Single Crystals, and Coatings of CrSi2 Obtained from Molten Salts

2020 ◽  
pp. 221-227
Author(s):  
Oleg Sapsay ◽  
Dmytro Shakhnin ◽  
Tetiana Lukashenko ◽  
Viktor Malyshev ◽  
Marcelle Gaune-Escard
Keyword(s):  
Heat Resistance ◽  
Single Crystals ◽  
Molten Salts ◽  
Nanocrystalline Powders

Growth of Strontium Titanate Single Crystals from Molten Salts

1968 ◽  
Vol 7 (4) ◽  
pp. 358-362 ◽  
Author(s):  
Tokukō Sugai ◽  
Shuzo Hasegawa ◽  
Gisaku Ohara
Keyword(s):  
Single Crystals ◽  
Strontium Titanate ◽  
Molten Salts

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.

scholarly journals Growth of Zirconium Titanate (ZrTiO4) Single Crystals from Molten Salts

1968 ◽  
Vol 76 (880) ◽  
pp. 429-430 ◽  
Author(s):  
Tokuko SUGAI ◽  
Shuzo HASEGAWA
Keyword(s):  
Single Crystals ◽  
Molten Salts ◽  
Zirconium Titanate

scholarly journals RENiO3 Single Crystals (RE = Nd, Sm, Gd, Dy, Y, Ho, Er, Lu) Grown from Molten Salts under 2000 bar of Oxygen Gas Pressure

2021 ◽  
Author(s):  
Yannick Maximilian Klein ◽  
Mirosław Kozłowski ◽  
Anthony Linden ◽  
Philippe Lacorre ◽  
Marisa Medarde ◽  
...  
Keyword(s):  
Single Crystals ◽  
Molten Salts ◽  
Gas Pressure ◽  
Oxygen Gas

The influence of sulfur impurity on heat resistance of single crystals of ZhS36-VI alloy with protective coating

2016 ◽  
pp. 20-23 ◽  
Author(s):  
D.E. Kablov ◽  
◽  
V.V. Sidorov ◽  
S.A. Budinovskiy ◽  
P.G. Min ◽  
...  
Keyword(s):  
Heat Resistance ◽  
Single Crystals ◽  
Protective Coating

Oriented attachment growth of hundred-nanometer-size LaTaON2 single crystals in molten salts for enhanced photoelectrochemical water splitting

2018 ◽  
Vol 6 (17) ◽  
pp. 7706-7713 ◽  
Author(s):  
Junkang Zhou ◽  
Chenguang Zhou ◽  
Zhan Shi ◽  
Zhe Xu ◽  
Shicheng Yan ◽  
...  
Keyword(s):  
Single Crystal ◽  
Molten Salt ◽  
Single Crystals ◽  
Water Splitting ◽  
Molten Salts ◽  
Photoelectrochemical Water Splitting ◽  
Oriented Attachment ◽  
Nanometer Size

Largely-sized single crystal photocatalyst was prepared by oriented attachment (OA) in molten salt.

The Microstructure of Shock-Synthesized Diamond

1967 ◽  
Vol 25 ◽  
pp. 324-325
Author(s):  
Lucien F. Trueb
Keyword(s):  
Single Crystals ◽  
Preferred Orientation ◽  
High Magnification ◽  
Texture Pattern ◽  
Shock Process ◽  
New Type ◽  
Diffraction Diagram

A new type of synthetic industrial diamond formed by an explosive shock process has been recently developed by the Du Pont Company. This material consists of a mixture of two basically different forms, as shown in Figure 1: relatively flat and compact aggregates of acicular crystallites, and single crystals in the form of irregular polyhedra with straight edges.Figure 2 is a high magnification micrograph typical for the fibrous aggregates; it shows that they are composed of bundles of crystallites 0.05-0.3 μ long and 0.02 μ. wide. The selected area diffraction diagram (insert in Figure 2) consists of a weak polycrystalline ring pattern and a strong texture pattern with arc reflections. The latter results from crystals having preferred orientation, which shows that in a given particle most fibrils have a similar orientation.

A New Defect in Polyethylene Single Crystals

1973 ◽  
Vol 31 ◽  
pp. 70-71
Author(s):  
E. L. Thomas ◽  
S. L. Sass
Keyword(s):  
Single Crystals ◽  
Screw Dislocation ◽  
Small Distance ◽  
Dipole Model ◽  
Dislocation Dipole ◽  
Chain Folding ◽  
Black And White ◽  
Polymer Crystal ◽  
Different Types

In polyethylene single crystals pairs of black and white lines spaced 700-3,000Å apart, parallel to the [100] and [010] directions, have been identified as microsector boundaries. A microsector is formed when the plane of chain folding changes over a small distance within a polymer crystal. In order for the different types of folds to accommodate at the boundary between the 2 fold domains, a staggering along the chain direction and a rotation of the chains in the plane of the boundary occurs. The black-white contrast from a microsector boundary can be explained in terms of these chain rotations. We demonstrate that microsectors can terminate within the crystal and interpret the observed terminal strain contrast in terms of a screw dislocation dipole model.

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