Microstructure, phase composition, and some properties of materials based on Sic-Si

Refractories ◽  
1972 ◽  
Vol 13 (7-8) ◽  
pp. 463-466
Author(s):  
A. P. Garshin ◽  
T. P. Nikitina
Keyword(s):  
Phase Composition ◽  
Properties Of Materials

Phase Composition and Thermoelectric Properties of Materials Based on Cu2 – xSe (0.03 ≤ x ≤ 0.23)

2021 ◽  
Vol 16 (3) ◽  
pp. 351-356
Author(s):  
A. A. Ivanov ◽  
R. Kh. Akchrin ◽  
D. I. Bogomolov ◽  
V. T. Bublik ◽  
M. V. Voronov ◽  
...  
Keyword(s):  
Phase Composition ◽  
Thermoelectric Properties ◽  
Properties Of Materials

Phase composition, microstructure, and properties of materials based on the ZrO2-Nd2O3 system

Refractories ◽  
1971 ◽  
Vol 12 (11-12) ◽  
pp. 800-804 ◽  
Author(s):  
V. I. Strakhov ◽  
Ya. V. Klyucharov ◽  
G. G. Sergeev
Keyword(s):  
Phase Composition ◽  
Microstructure And Properties ◽  
Properties Of Materials

scholarly journals Theoretical and technological aspects of production mechani‑cally alloyed powders for the production of coatings and products by additive methods

2021 ◽  
pp. 90-105
Author(s):  
F. G. Lovshenko ◽  
A. S. Fedosenko ◽  
E. I. Marukovich
Keyword(s):  
Phase Composition ◽  
Thermal Spraying ◽  
Thermal Spray Coatings ◽  
Layer By Layer ◽  
Properties Of Coatings ◽  
Spray Coatings ◽  
Structure Phase ◽  
316L Steel ◽  
Properties Of Materials ◽  
Additive Methods

The established regularities of the formation of powders based on iron and nickel, obtained by the method of mechanical alloying and intended for the deposition of thermal spraying coatings, as well as the manufacture of products by layer‑by‑layer synthesis. The structure, phase composition and properties of materials are investigated. Powders consist of particles with a size of 20–70 microns, differ in the submicrocrystalline type structures, and nonequilibrium phase composition. Thermal spray coatings made of them have a set of properties that significantly exceed the properties of coatings made of commercially available materials. The diameter of the grains of the material obtained by the SLМ method from the synthesized powder is 1.5–2.0 times smaller than that produced from the powder of 316L steel, and the heat resistance is higher.

scholarly journals The phase composition, structure and properties of high-temperature-based powders of the system iron-aluminum obtained by the technology of the reaction-mechanical alloying. Foundry production and metallurgy

2019 ◽  
pp. 133-141 ◽  
Author(s):  
F. G. Lovshenko ◽  
A. S. Fedosenko
Keyword(s):  
Phase Composition ◽  
Mechanical Alloying ◽  
Average Particle Size ◽  
Thermal Spraying ◽  
Average Particle ◽  
Structure And Properties ◽  
Prolonged Heating ◽  
Iron Aluminum ◽  
Properties Of Materials ◽  
Composition Structure

The regularities of the formation of powders based on the Fe-Al system, obtained by the method of mechanical alloying and intended for the deposition of thermal spraying coatings were established. The morphology, structure, phase composition and properties of materials are investigated. After mechanical synthesis, the powders have an average particle size of 30–100 µm, submicrocrystalline structures, and nonequilibrium phase composition. Annealing of powders causes to an increase in the hardness of particles up to 80%, the value of which is largely preserved after prolonged heating to 1170 K, which indicates the presence of heat-resistant materials.

Structure Formation and Phase Composition of Sulfur-Bitumen Systems

2016 ◽  
Vol 871 ◽  
pp. 110-117
Author(s):  
Vitaliy Gladkikh ◽  
Evgeniy Korolev ◽  
Dmitrij Husid
Keyword(s):  
Phase Composition ◽  
Asphalt Concrete ◽  
Solid Phase ◽  
Road Construction ◽  
Thermal Conditions ◽  
Concrete Technology ◽  
Petroleum Bitumen ◽  
Properties Of Materials ◽  
Chemical Products ◽  
New Compounds

Nowadays, modification of the bitumen by sulfur is considered as an effective way to enhance the properties of materials for road construction. By means of using the sulfur we eliminate the need to reconstruct existing production facilities for asphalt concrete. There is a plenty of research had already been performed for investigation of the sulfur-extended asphalt. Still, formation of new compounds in sulfur-bitumen systems depends on many factors, including mixture and thermal conditions. In the present work we have carried out both experimental and theoretical examination of the specific sulfur-bitumen binder made of grade 60/90 petroleum bitumen and technical sulfur at temperatures that are typical for ordinary asphalt concrete technology. The obtained results indicate that there is no noticeable formation of new chemical products in sulfur-bitumen melts at temperatures below 145 °C. Sulfur is partially dissolved in bitumen during the technological operations; the limiting concentration of dissolved sulfur is near 10%. Later in the course of cooling, the crystallization of the sulfur takes place, accompanied with formation of a separate solid phase.

Thermally-Activated Al(OH)3: Phase Transformations and Porosity

2015 ◽  
Vol 670 ◽  
pp. 133-138 ◽  
Author(s):  
Anna Savel'eva ◽  
Tatiana Bugrova ◽  
Andrey Petrov ◽  
Valeriy Dutov ◽  
Grigory Mamontov
Keyword(s):  
Thermal Analysis ◽  
Phase Composition ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Pore Volume ◽  
Construction Materials ◽  
Thermally Activated ◽  
Important Intermediate ◽  
Properties Of Materials

Thermochemically activated aluminum trihydroxide (Al (OH)3) is an important intermediate for ceramics, construction materials, catalysts, etc. Functional properties of materials based on Al (OH)3 depend on its phase composition and porosity. A series of thermochemically activated Al (OH)3 calcined at temperatures from 120 to 800 °C were studied by low-temperature N2 sorption, XRD and thermal analysis. It was shown that transformation of gibbsite to boehmite occurs below 300 °C and is accompanied by increasing of specific surface area and pore volume. Transformation of boehmite to γ-Al2O3 proceeds above 400 °C. The sample calcined at 500 °C was shown to consist of monophase γ-Al2O3 with specific surface area of 206 m2/g and pore volume of 0.55 cm3/g.

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