Some principles of combustion of titanium-silicon mixtures

Azatyan, T. S.; Mal'tsev, V. M.; Мержанов, А. Г.; Seleznev, V. N.

doi:10.1007/bf00785326

Cited by 46 publications

(17 citation statements)

References 3 publications

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“…Propagation rates for Ti + 2B -* TiB a of _< 2 cm s -~, and 4-6 cm s-1 have been reported, respectively, by Holt et al [15] and Azatyan et al [16]. The latter agrees reasonably well with Rice et al data (Fig.…”

Section: Introductionsupporting

confidence: 81%

“…The data of Holt et al [15] for limited experiments in adding excess TiB 2 to reactants to form TiB1.5 or TiB2, showed considerable reduction in propagation rates. Extrapolation of these rates to no TiB2 addition gives propagation rates consistent with those of Azatyan et al [16] and Rice et al [11] (e.g., Fig. 1, at ~ 60% of the theoretical density as used by Holt et al [15]).…”

Section: Introductionsupporting

confidence: 54%

“…The latter agrees reasonably well with Rice et al data (Fig. 1) [2] report that cold pressed bodies (densities not given) of 5 lam Si and 10 lam C were not ignitable to give SiC but that 5 lam or 0.01 ~tm Si were ignitable with 0.2 or 0.003 gm C. Increasing the size of the Ti particles reacting with Si has been reported to change the mode of propagation from a stable, uniformly propagating reaction from an unstable spin mode [16].…”

Section: Introductionmentioning

confidence: 96%

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Microstructural aspects of fabricating bodies by self-propagating synthesis

Rice

1991

J Mater Sci

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Existing data on effects of reactant compact microstructure on self-propagating synthesis, SPS type reactions is reviewed. Propagation rates generally decrease with increased compact density at higher densities, and reactions are no longer ignitable at high densities. At lower densities the trends may vary depending on the reactions. Propagation rates and ignitability also generally decrease with increasing particle size, and can be affected by particle shape. More exothermic reactions lead to greater expansion, hence porosity, in unconstrained samples, while resultant pore sizes are effected mainly by outgassing. Final grain sizes are not a significant function of the initial particle size (but can be effected by finer residual porosity).

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Section: Introductionsupporting

confidence: 81%

Section: Introductionsupporting

confidence: 54%

Section: Introductionmentioning

confidence: 96%

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Microstructural aspects of fabricating bodies by self-propagating synthesis

Rice

1991

J Mater Sci

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“…These are well documented in References 9, 10, 14, and 15 . Azatyan et al [20] has derived an expression for the rate of propagation of a planar combustion front based upon an elementary model of the process. In this model, the calculations are performed assuming a uniform radial distribution (a planar front).…”

Section: Kinetic Considerationsmentioning

confidence: 99%

Combustion Synthesis: An Update

Bhaduri

2012

Ceramics and Composites Processing Methods

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“…Nevertheless, the reaction order calculated from constant A [O] n−nF exp(−E a /RT) appeared to be inaccurate and unreasonable since the oxygen concentration varies with fuel concentration. On the basis of thermal theory, Khaikin and Merzhanov (1966) proposed the relation between combustion velocities and reaction order, activation energy of gas-solid reaction under the condition of steady combustion, which was applied widely in heterogeneous combustion (Merzhanov et al, 1972;Azatyan et al, 1979;Kirdyashkin et al, 1981;Holt et al, 1985). The activation energy can be obtained by fitting experimental velocities at adiabatic flame temperature.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Hydrogen Combustion: Global Reaction Model and Validation

Zhang

Liu

2017

Front. Energy Res.

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Due to the complexity of modeling the combustion process in nuclear power plants, the global mechanisms are preferred for numerical simulation. To quickly perform the highly resolved simulations with limited processing resources of large-scale hydrogen combustion, a method based on thermal theory was developed to obtain kinetic parameters of global reaction mechanism of hydrogen-air combustion in a wide range. The calculated kinetic parameters at lower hydrogen concentration (C hydrogen < 20%) were validated against the results obtained from experimental measurements in a container and combustion test facility. In addition, the numerical data by the global mechanism (C hydrogen > 20%) were compared with the results by detailed mechanism. Good agreement between the model prediction and the experimental data was achieved, and the comparison between simulation results by the detailed mechanism and the global reaction mechanism show that the present calculated global mechanism has excellent predictable capabilities for a wide range of hydrogen-air mixtures.

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Some principles of combustion of titanium-silicon mixtures

Cited by 46 publications

References 3 publications

Microstructural aspects of fabricating bodies by self-propagating synthesis

Microstructural aspects of fabricating bodies by self-propagating synthesis

Combustion Synthesis: An Update

Numerical Simulation of Hydrogen Combustion: Global Reaction Model and Validation

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