The self-propagating high-temperature synthesis of a nanostructured titanium nitride powder with the use of sodium azide and haloid titanium-containing salt

Shiganova, Ljudmila; Bichurov, G. V.; Амосов, А. П.; Titova, Yu. V.; Ermoshkin, A. A.; Bichurova, P. G.

doi:10.3103/s1067821211010238

Cited by 19 publications

(11 citation statements)

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“…Results of research [28] have determined that the use of powders of different compositions in preparing the initial mixture makes it possible to significantly reduce particle size in SHS products. Therefore, we can assume that replacing the Ni-Ti-B powder mixture with a NiB-Ti system may lead to a decrease in the size of titanium diboride particles in the (Ni-Ti)-TiB2 composite.…”

Section: Introductionmentioning

confidence: 99%

High-Temperature Synthesis of Metal–Matrix Composites (Ni-Ti)-TiB2

et al. 2021

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Currently, metal–matrix composite materials are some of the most promising types of materials, and they combine the advantages of a metal matrix and reinforcing particles/fibres. Within the framework of this article, the high-temperature synthesis of metal–matrix composite materials based on the (Ni-Ti)-TiB2 system was studied. The selected approaches make it possible to obtain composite materials of various compositions without contamination and with a high degree of energy efficiency during production processes. Combustion processes in the samples of a 63.5 wt.% NiB + 36.5 wt.% Ti mixture and the phase composition and structure of the synthesis products were researched. It has been established that the synthesis process in the samples proceeds via the spin combustion mechanism. It has been shown that self-propagating high-temperature synthesis (SHS) powder particles have a composite structure and consist of a Ni-Ti matrix and TiB2 reinforcement inclusions that are uniformly distributed inside it. The inclusion size lies in the range between 0.1 and 4 µm, and the average particle size is 0.57 µm. The obtained metal-matrix composite materials can be used in additive manufacturing technologies as ligatures for heat-resistant alloys, as well as for the synthesis of composites using traditional methods of powder metallurgy.

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Section: Introductionmentioning

confidence: 99%

High-Temperature Synthesis of Metal–Matrix Composites (Ni-Ti)-TiB2

et al. 2021

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“…Experimental investigation of the combustion process: the measurement of linear rates of the combustion front propagation and the maximum com-bustion temperatures was conducted in a laboratory reactor with working volume 4.5 liters. The inner diameter of the reactor space is 0.147 m, the height is 0.255 m. The methodology of synthesis, measurement of linear velocities and the maximum combustion temperatures are described in detail in [5][6][7][8][9].…”

Section: Methodsmentioning

confidence: 99%

“…Shkiro, provides considerable possibilities to obtain nanopowders of variable high-melting compounds [4,5]. Azide technology of SHS designated as SHS-Az applying sodium azide NaN 3 as solid nitriding agent instead of gaseous nitrogen allows us to produce a wide range of ceramic powders of nitrides and composition on their basis including Si 3 N 4 -SiC [6][7][8][9]. The use of halides, low combustion temperature and presence of gaseous and condensed by-products inhibit the recrystallization and agglomeration of product grains and make it possible to obtain weakly sintered nanopowders and nanofibers of the SHS-Az products.…”

Section: Introductionmentioning

confidence: 99%

Self-Propagating High-Temperature Synthesis of Silicon Carbide and Silicon Nitride Nanopowders Composition using Sodium Azide and Halides

et al. 2013

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Regularities of self-propagating high-temperature synthesis (SHS) or combustion synthesis (CS) by using “silicon – sodium azide – ammonium hexafluorosilicate – carbon – aluminum” powder mixture in the nitrogen atmosphere were investigated. The thermodynamic analysis of the combustion synthesis was performed. Experimental investigation of the combustion process: the measurement of linear rates of the combustion front propagation and the maximum combustion temperatures was conducted in a laboratory reactor with working volume 4.5 liters. The influence of the components ratio in the initial mixture on the combustion temperature, combustion rate and composition of reaction product was studied. The phase composition of the product synthesized was determined with an X-ray diffractometer. It was disclosed that the SHS product consists of the composition (mixture) of silicon carbide nanopowder with silicon nitride whiskers and a final halide. Investigation of surface topography and morphology of the product particles was carried out with a scanning electron microscope. Optimal mixture for the synthesis of nanoscale composition based on silicon carbide was determined: “14Si+6NaN3+(NH4)2SiF6+15C+Al”. In this case, the SHS product consists of four phases: silicon carbide (β-SiC) – 48.57 wt.%, α-silicon nitride (α-Si3N4) – 27.04 wt.%, β-silicon nitride (β-Si3N4) – 5.83 wt.%, and sodium hexafluoroaluminate (Na3AlF6) – 18.56 wt.%. The average particle size of the composition was in the range of 70–130 nm. It was shown that the composition of the silicon carbide with silicon nitride and the final halide Na3AlF6 playing a role a flux can be used as a modifier of castable aluminum alloys and as a reinforcing phase of aluminomatrix composites.

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“…The reaction of self-propagating high-temperature synthesis of Ti 3 SiC 2 was initiated through the ignition of the end of the preform with an electric coil in a laboratory SHS reactor of 4.5 litres described in (Shiganova, et al, 2011), or outdoors on fireclay brick, or in the filling of sand according to the scheme presented in Figure 1. Filling of sand prevented the burning preform from immediate contact with atmospheric air, at the same time allowing the gases released during the burning of the preform to infiltrate through the filling into the surrounding air.…”

Section: Methodsmentioning

confidence: 99%

The Influence of Gas Atmosphere Composition on Formation of Surface Films in Self-propagating High-temperature Synthesis of Porous Ti3SiC2

Амосов¹,

Latukhin²,

Davydov³

2014

MAS

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In the present work, the structure and composition of the surface layer formed during self-propagating high-temperature synthesis (SHS) of porous ternary carbide Ti 3 SiC 2 from the initial mixture of powders 3Ti+1.15Si+2C in the surrounding gas atmosphere of different compositions were investigated. Using X-ray analysis, scanning electron microscopy and energy dispersive analysis, it was shown that a porous composite material, consisting of the main phases Ti 3 SiC 2 and TiC, is synthesized under these conditions. During the synthesis in atmospheres of air and nitrogen, a film of 2-3 microns thickness consisting of TiO 2 and TiN is formed on the surface of the porous material. During the SHS process in an inert argon atmosphere and in vacuum, this film is not formed. In nitrogen atmosphere, conglomerates of TiN particles are formed on the film as well.

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The self-propagating high-temperature synthesis of a nanostructured titanium nitride powder with the use of sodium azide and haloid titanium-containing salt

Cited by 19 publications

References 0 publications

High-Temperature Synthesis of Metal–Matrix Composites (Ni-Ti)-TiB2

High-Temperature Synthesis of Metal–Matrix Composites (Ni-Ti)-TiB2

Self-Propagating High-Temperature Synthesis of Silicon Carbide and Silicon Nitride Nanopowders Composition using Sodium Azide and Halides

The Influence of Gas Atmosphere Composition on Formation of Surface Films in Self-propagating High-temperature Synthesis of Porous Ti3SiC2

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