Spectral-optical investigation of the mechanism of the combustion of mixtures of titanium and carbon

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

doi:10.1007/bf00754993

Cited by 20 publications

(3 citation statements)

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“…Azatyan et al [8] found that both combustion temperature and velocity of propagating combustion wave deceased with the increase of particle size of Ti in the Ti-C system. Fan et al [9] investigated that the particle size of Ti and Fe would affect the characteristics of combustion synthesis in Fe-Ti-C system.…”

Section: Introductionmentioning

confidence: 98%

Influence of reactant particle size on products of self-propagating high-temperature synthesis in 30wt.% Cr–Ti–B4C system

Zhang

Wang

et al. 2009

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 98%

Influence of reactant particle size on products of self-propagating high-temperature synthesis in 30wt.% Cr–Ti–B4C system

Zhang

Wang

et al. 2009

Journal of Alloys and Compounds

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“…Intermediate variants of mixed specimens consisting of inert, heat-releasing, and heat-absorbing substances are also used. The model systems examined in the present work were the well-studied titanium-aluminum [14] and titanium-carbon [15,16] SHS systems. Heating of a stoichiometric mixture of titanium and aluminum powders to the melting point of aluminum leads to self-heating of the reacting mass in the thermal explosion mode; in this case, the temperature can reach 1480 • C, i.e., the melting point of the γ-phase of TiAl.…”

Section: Methods Of Preheating By a Chemical Furnacementioning

confidence: 99%

Chemical furnace for preheating in dynamic consolidation experiments

Gur'ev

Gordopolov

Бацанов

2005

Combust Explos Shock Waves

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A new method is developed for specimen preheating with subsequent loading by shock waves and conservation of the products of shock consolidation; the method is based on the use of the chemical furnace energy produced by a thermal explosion or combustion of SHS systems. The use of the thermal explosion expands the range of pre-shock heating temperatures up to 3000 • C and the range of mean pressures in the cylindrical ampoule up to 25 GPa. Two variants of preheating are considered: an inert specimen is heated by heat release in a reacting SHS system or the specimen under study itself is an SHS system.

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“…In most of the reported experimental investigations on the influence of particle size on wave velocity, the particle size of the lower-melting component, the metal (in a metal-nonmetal reaction), was considered. 16,21,[26][27][28][29][30][31][32][33][34] Discrepancies between the reported results may reflect the influence of the particle size of the higher-melting element in the reaction. In a recent investigation by Li and Sekhar, 35 the size of Al particles had little or no effect on the synthesis of NiAl.…”

Section: Review Of the Effect Of Particle Size On Reaction Propagmentioning

confidence: 99%

Effect of Particle Size on the Reaction Wave Propagation in the Combustion Synthesis of Al₂O₃‐ZrO₂‐Nb Composites

Tomasi

Munir

1999

Journal of the American Ceramic Society

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The effect of reactant particle size on the kinetics of wave propagation in the thermite system Nb2O5+ Al2Zr + nuAl2O3 (with alumina being a diluent) was investigated. Reactants in three size ranges were utilized: fine (1–3 µm), medium (<10 µm), and coarse (10–45 µm). Particle size had an effect on the mode and velocity of the self‐propagating combustion wave. For fine particles, the combustion wave propagated in a steady‐state mode for all values of dilutions investigated (0 ≤ nu ≤ 0.8). For medium particles with nu > 0.1 and for all coarse particles, wave propagation was in the spin mode. A significantly large difference between the calculated adiabatic combustion temperatures and the measured values was observed and is attributed to large heat losses arising from very wide reaction zones. For fine particles, the temperature dependence of the wave velocity showed a discontinuity at a temperature corresponding to the formation of the eutectic in the binary ZrO2‐Al2O3. The velocity can be more than a factor of 3 higher at the same temperature, depending on the amount of the eutectic liquid. The dependence of the wave velocity on particle size (r) was found to have the form v is proportional to 1/rm with 0.5 < m < 0.8. The upper limit approximates that of m= 1.0 for diffusion‐controlled reaction kinetics, according to reported modeling studies. In all cases, regardless of the mode of wave propagation the reactions resulted in the desired products, Nb + ZrO2+ Al2O3 with a microstructure exhibiting the eutectic of the binary ZrO2‐Al2O3.

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Spectral-optical investigation of the mechanism of the combustion of mixtures of titanium and carbon

Cited by 20 publications

References 0 publications

Influence of reactant particle size on products of self-propagating high-temperature synthesis in 30wt.% Cr–Ti–B4C system

Influence of reactant particle size on products of self-propagating high-temperature synthesis in 30wt.% Cr–Ti–B4C system

Chemical furnace for preheating in dynamic consolidation experiments

Effect of Particle Size on the Reaction Wave Propagation in the Combustion Synthesis of Al₂O₃‐ZrO₂‐Nb Composites

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Spectral-optical investigation of the mechanism of the combustion of mixtures of titanium and carbon

Cited by 20 publications

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Influence of reactant particle size on products of self-propagating high-temperature synthesis in 30wt.% Cr–Ti–B4C system

Influence of reactant particle size on products of self-propagating high-temperature synthesis in 30wt.% Cr–Ti–B4C system

Chemical furnace for preheating in dynamic consolidation experiments

Effect of Particle Size on the Reaction Wave Propagation in the Combustion Synthesis of Al2O3‐ZrO2‐Nb Composites

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Effect of Particle Size on the Reaction Wave Propagation in the Combustion Synthesis of Al₂O₃‐ZrO₂‐Nb Composites