Self-propagating high-temperature synthesis of nano-sized titanium carbide powder

Hayk, Nersisyan; Lee, Sang-Kwon; Won, C.W.

doi:10.1557/jmr.2002.0415

Cited by 70 publications

(44 citation statements)

References 9 publications

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“…NaCl does not react with the product phases and does not form new or hard-to-leach phases, as opposed to MgO. The effect of NaCl has been investigated previously in other combustion synthesis systems [15,30,31]. When NaCl was used as the diluent, no crystalline compounds containing NaCl was detected in the products.…”

Section: Volume Combustion Synthesis (Vcs)mentioning

confidence: 99%

Preparation of single phase molybdenum boride

Çamurlu

2011

Journal of Alloys and Compounds

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Section: Volume Combustion Synthesis (Vcs)mentioning

confidence: 99%

Preparation of single phase molybdenum boride

Çamurlu

2011

Journal of Alloys and Compounds

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“…A high-frequency plasmatron with gas discharge stabilization was used to generate the plasma [12,13]. In connection with the high ionization potential of nitrogen in the plasma torch, an argon discharge is created by means of an electric pulse of high voltage from a tungsten ignition needle.…”

Section: Discussion Of Research Resultsmentioning

confidence: 99%

“…There are several theories of modification, but none of them describes the process completely. Nanodispersed compositions have been used as modifiers of steels and alloys [10][11][12][13]. The disadvantage of the work on the modification of structural steels and alloys with nanodispersed compositions is the lack of a comparative evaluation of different methods for obtaining nanocomposites and the thermodynamic analysis of the existence of nanoparticles in the melt.…”

Section: Literature Reviewmentioning

confidence: 99%

Investigation of the Influence of Nanodispersed Compositions Obtained by Plasmochemical Synthesis on the Crystallization Processes of Structural Alloys

Dzhur¹,

Калинин

Grekova

et al. 2017

EUREKA: Physics and Engineering

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The state of the problem of stabilizing the structure, improving the quality and properties of structural alloys is studied. To solve the problem, it is proposed to modify melts of low–alloyed alloys with nanodispersed compositions obtained by plasma–chemical synthesis. Process technological parameters are developed. Nanopowders of carbide and carbonitride class SiC and Ti (C, N) with a size of 50 ... 100 nm are obtained. The crystallographic parameters of the nanocompositions and the specific surface are determined, and the dependency curves are plotted. The macro– and microstructure of structural steels and alloys was studied before and after the modification. A significant (in 2 ... 3.5 times) grain refinement and stabilization of the alloy structure as a result of nanopowder modification of titanium carbonitride have been achieved. Thermodynamic calculations of the dimensions of crystalline seeds during the crystallization of steels and alloys are carried out. A complex criterial estimation of the efficiency of nanodispersed compositions in a steel melt is proposed. The features of crystallization and structure formation of modified structural steels are studied. The obtained results are of theoretical and practical importance for production of critical parts from structural steels and high–quality alloys.

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“…Therefore, oxygen and nitrogen pose great difficulties in obtaining pure TiC. Production of titanium carbide with the self-propagating high-temperature synthesis (SHS) method is characterized by the fact that the combustion reaction in the compact of titanium powder and carbon black completes in just a few seconds [11][12][13][14][15][16][17][18]. The synthesis is most often carried out in a protective inert atmosphere.…”

Section: Introductionmentioning

confidence: 99%

Sintering Behavior and Microstructure of TiC-Me Composite Powder Prepared by SHS

Коростелева

Коржова

Krinitcyn

2017

Metals

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Titanium, its alloys, and refractory compounds are often used in the compositions of surfacing materials. In particular, under the conditions of electron-beam surfacing the use of synthesized composite powder based on titanium carbide with a metal binder (TiC-Me) has a positive effect. These powders have been prepared via the self-propagating high-temperature synthesis (SHS) present in a thermally-inert metal binder. The initial carbide particle distribution changes slightly in the surfacing layer in the high-energy rapid process of electron-beam surfacing. However, these methods also have their limitations. The development of technologies and equipment using low-energy sources is assumed. In this case, the question of the structure formation of composite materials based on titanium carbide remains open, if a low-energy and prolonged impact in additive manufacturing will be used. This work reports the investigation of the sintered powders that were previously synthesized by the layerwise combustion mode of a mixture of titanium, carbon black, and metal binders of various types. The problems of structure formation during vacuum sintering of multi-component powder materials obtained as a result of SHS are considered. The microstructure and dependences of the sintered composites densification on the sintering temperature and the composition of the SH-synthesized powder used are presented. It has been shown that under the conditions of the nonstoichiometric synthesized titanium carbide during subsequently vacuum sintering an additional alloy formation occurs that can lead to a consolidation (shrinkage) or volumetric growth of sintered TiC-Me composite depending on the type of metal matrix used.

show abstract

Self-propagating high-temperature synthesis of nano-sized titanium carbide powder

Cited by 70 publications

References 9 publications

Preparation of single phase molybdenum boride

Preparation of single phase molybdenum boride

Investigation of the Influence of Nanodispersed Compositions Obtained by Plasmochemical Synthesis on the Crystallization Processes of Structural Alloys

Sintering Behavior and Microstructure of TiC-Me Composite Powder Prepared by SHS

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