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Article
The Effect of Impurity Gas on the Combustion Mode of Granular Mixtures Ti–C–B
Experimental studies of the combustion of granular mixtures (100 – X)(Ti + C) + X(Ti + 2B), 0 ≤ X ≤ 100 wt %, were carried out. Granules 0.6 and 1.7 mm in size were made using an alcoholic solution of polyvinyl b...
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Article
Study of Patterns and Mechanisms of Combustion of a Powdered and Granulated Ti–C–B System
Experimental studies of the combustion patterns of the ternary system (100 – x)(Ti + C) – x(Ti + 2B) of bulk density in the powder and granular form used for the synthesis of TiC–TiB2 composite ceramics are carri...
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Article
Patterns of Synthesis of TiC–NiCr Cermets from Powder Mixtures: Influence of Nichrome Content and Titanium Particles Size
The combustion patterns of powder mixtures (100 – X)(Ti + C) + XNiCr, X = 0–20%, and phase composition of synthesis products were studied. The different nature of the dependence of the burning velocity on the nic...
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Article
Combustion Synthesis of Cermets from Granular Mixtures Ti–C–NiCr for Protective Coatings
The combustion modes of granular mixtures (100 – X)(Ti + C) + XNiCr, X = 0–30%, were studied. The experimental setup provided filtration of impurity gases released during combustion, either in the direction of pr...
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Article
Granulation Effect on Chemically Activated SHS of MgAlON
MgAlON were prepared by self-propagation high temperature synthesis (SHS) using powder and granular mixtures of aluminum, aluminum oxide, magnesium oxide, and magnesium perchlorate. The influence of granulatio...
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Article
Combustion of Ti–Si–C Mixtures: Impact of Medium Structure and Impurity Gas Release
A study was made of the combustion of powder and granular mixtures (1 – X)(Ti + C) + X(5Ti + 3Si), where 0 ≤ X ≤ 1, on the base of titanium powder with the characteristic size of Ti particles d(Ti) = 120 μm. The ...
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Article
Investigation of Macrokinetic Parameters of Combustion of (Ti + C)-Based Powder and Granular Mixtures: Elucidation of the Negative Activation Energy Paradox
For the first time, a comparative study is carried out of the macrokinetic parameters of the combustion of powder and granular mixtures of Ti + C when diluted by metal powders. The burning rates of powder mixt...
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Article
Structural Macrokinetics of Combustion of Ti-Based Mixtures with Titanium Particles of Different Sizes
Experimental dependences of the combustion velocity on the size of titanium particles for powder and granular mixtures of 5Ti + 3Si, Ti + Cam, (Ti + Cam) + 20% Cu, (Ti + Cam) + 20% Ni, Ti + Ccr (with amorphous ca...
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Article
Thermal Stability of Passivated Compacts from Pyrophoric Iron Nanopowders
Compact samples with diameters of 3 and 5 mm are prepared from pyrophoric iron nanopowder in a glove box in an argon atmosphere, which are placed in bottles with a ground-in lid. The iron nanopowder is obtaine...
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Article
Reason for the Increasing Burning Rate of a Ti + C Powder Mixture Diluted with Copper
The paper describes the first comparative study of combustion of powder and granular mixtures [Ti + C and (Ti + C) + 20% Cu], in which the granule size is different and the titanium particle size varies from 3...
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Article
Nature of the Increase in the Rate of Combustion of a Ti–C Mixture Diluted with an Inert Additive
An original comparative study is performed of the combustion of granular and powder Ti–C and (Ti–C)+20%Ni mixtures with granules of different sizes, while varying titanium particle sizes in a range of 31–142 m...
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Article
On the Nature of the Multidirectional Change in Combustion Velocity of Ti-based Powder Mixtures When Diluted with Inert Additives
Macrokinetic parameters of combustion of powder and granular mixtures were studied upon dilution of Ti + C with various metal powders. The combustion velocities of powder mixtures (Ti + C) + 20% Me (Me = Ni, C...
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Article
SHS and Study of Ni/TiC Catalysts for CO2 Hydrogenation to Methane
Ni/TiC catalysts were produced by SHS from granular Ti + C + Ni mixtures and leaching in NaOH solution followed by stabilization with H2O2 solution of intermetallic precursors prepared by SHS from TiC + (Ni + Al)...
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Article
Explanation of Increase in Combustion Velocity of Ti + C Powder Mixture upon Dilution with Nickel Using Convective–Conductive Combustion Model
For the first time, a comparative study of the macrokinetic combustion parameters for granular and powder Ti + C and (Ti + C) + 20% Ni mixtures with variation in Ti particle sizes from 31 to 142 µm was carried...
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Article
Macrokinetics of Combustion of Powder and Granular Titanium Mixtures with Different Allotropic Forms of Carbon
Even a slight change in the content of impurity gases during a self-propagating high-temperature synthesis can lead to a change in the combustion regime and the characteristics of the target products. In this ...
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Article
Combustion of 5Ti + 3Si Blends: Impact of Granule Diameter and Ti Particle Size
This work explains the different ratio of the burning velocities of powder and granulated 5Ti + 3Si mixtures with Ti particles 35 and 120 μm in size due to the influence of impurity gases, which depends on the...
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Article
Macrokinetic Mechanism of the Combustion of 5Ti + 3Si Powder and Granular Mixtures: Effects of the Release of Impurity Gas and the Size of Titanium Particles
SHS synthesis of titanium carbide and metalloceramics (cermets) based on it shows that transition from a powder mixture to a granular mixture reduces the effect of the release of impurity gas from component pa...
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Article
Combustion Macrokinetics of Granulated (Ti + C)–Ni Mixtures. Impact of Grain Size
This paper describes the combustion of 90% (Ti + C) + 10% Ni and 80% (Ti + C) + 20% Ni granular mixtures with a binder (polyvinyl butyral) content of the order of 1%, used to obtain composite materials. Experi...
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Article
Combustion of Ti–C Powders and Granules: Impact of Carbon Allotropy and Ti Particle Size
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Article
Experimental–Theoretical Determining of the Interphase Heat Transfer Coefficient in the Process of Combustion of a Granular SHS Mixture in a Gas Flow
In the process of the combustion of combined specimens of (Ti + C)/(easily ignitable granules) and (Ti + C)/(inert particles/(easily ignitable granules) in the cocurrent flow of nitrogen, an experimental verif...
