Combustion synthesis of titanium carbide: Theory and experiment

Holt, Jason; Munir, Zuhair A.

doi:10.1007/bf01144729

Cited by 348 publications

(106 citation statements)

References 20 publications

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“…As indicated, Tc increases with the increase in the C/Ti ratio, reaches a maximum value at C/Ti = 1.0 and then slightly decreases at C/Ti = 1.2. This variation tendency is consistent with the theoretical prediction for the dependence of adiabatic temperature on the C/Ti stoichiometry, 1) despite the fact that the real experimental temperatures are much lower than the adiabatic ones due to considerable heat loss. The maximum heating rate, derived from the time-temperature curves, also increases with increasing the C/Ti ratio and thus turns to be nearly constant at C/Ti = 1.0 and 1.2.…”

Section: Resultssupporting

confidence: 79%

“…Holt and Munir reported that substantial gases such as carbon monoxide were evolved when the Ti-C compact was combusted in a vacuum chamber. 1) In this sense, it is the substoichimetric TiC rather than the stoichimetric TiC that was developed. Figure 7 shows the typical time-temperature plots during SHS in the Ti-C samples (C/Ti = 1.0) with different graphite particle sizes and Table 1 gives the maximum combustion temperatures of the Ti-C samples with different graphite particle sizes and C/ Ti ratios.…”

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confidence: 99%

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Effect of reactant C/Ti ratio on the stoichiometry of Combustion-synthesized TiCx in Ti-C system

Zou

Jin

Shen

et al. 2009

J. Ceram. Soc. Japan

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In this study, self-propagating high-temperature synthesis (SHS) of the powder compact consisting of titanium and graphite was used to synthesize titanium carbide (TiCx). The relationship between the C/Ti ratio in the reactants and the stoichiometry of the resultant TiCx phase was investigated. The result showed that when the molar ratio of C to Ti in the reactants increased from 0.6 to 1.2, the stoichiometry of the resultant TiCx phase first increased and then decreased with the maximum value appearing at C/Ti = 1.0, so did the change in the maximum combustion temperature; Furthermore, with an increase in the particle size of graphite, the maximum combustion temperature and the stoichiometry of the resultant TiCx phase decreased. Consequently, the maximum combustion temperature might play a dominating role in determining the final composition of the TiCx phase.

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Section: Resultssupporting

confidence: 79%

mentioning

confidence: 99%

Effect of reactant C/Ti ratio on the stoichiometry of Combustion-synthesized TiCx in Ti-C system

Zou

Jin

Shen

et al. 2009

J. Ceram. Soc. Japan

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“…In our experiment, we found that the CS reactions did not propagate when the quantity of diluent exceeded the optimum quantity. Munir [8] had published the following empirical rule for the CS reaction: The CS reaction can self-propagate only if the adiabatic temperature (T ad ) ≥ 1800 K. In addition, Holt [26] had validated T ad would decrease gradually with an increase in diluent additives. Owing to lack of thermodynamic data on β-SiAlON, we could not calculate the exact value of T ad in our experiment.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of dense β-SiAlON by a combination of combustion synthesis (CS) and spark plasma sintering (SPS)

Yi¹,

Watanabe²,

Akiyama³

2010

Intermetallics

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“…This choice is basically motivated by the largest number of papers devoted to Ti-C than to other carbide systems mentioned above. 32 It then obviously follows that all the parameters involved in the numerical simulations refer to the Ti-C system (see Part II 27 ). The system thermodynamics is accounted for by the phase diagram reported in Fig.…”

Section: B Thermodynamicsmentioning

confidence: 99%

Combustion synthesis of metal carbides: Part I. Model development

et al. 2005

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The definition of a rigorous theoretical framework for the appropriate physico-chemical description of self-propagating high-temperature synthesis (SHS) processes represents the main goal of this work which is presented in two sequential articles. In this article, a novel mathematical model to simulate SHS processes is proposed. By adopting a heterogeneous approach for the description of mass transfer phenomena, the model is based on appropriate mass and energy conservation equations for each phase present during the system evolution. In particular, it takes microstructural evolution into account using suitable population balances and properly evaluating the different driving forces from the relevant phase diagram. The occurrence of phase transitions is treated on the basis of the so-called enthalpy approach, while a conventional nucleation-and-growth mechanistic scenario is adopted to describe quantitatively the formation of reaction products. The proposed mathematical model may be applied to the case of combustion synthesis processes involving a low melting point reactant and a refractory one, as for the synthesis of transition metal carbides from pure metal and graphite. Thus, the model can be profitably used to gain a deeper insight into the microscopic elementary phenomena involved in combustion synthesis processes through a suitable combination of experimental and modeling investigations, as it may be seen in Part II of this work [J. Mater. Res. 20, 1269(2005].

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Combustion synthesis of titanium carbide: Theory and experiment

Cited by 348 publications

References 20 publications

Effect of reactant C/Ti ratio on the stoichiometry of Combustion-synthesized TiCx in Ti-C system

Effect of reactant C/Ti ratio on the stoichiometry of Combustion-synthesized TiCx in Ti-C system

Fabrication of dense β-SiAlON by a combination of combustion synthesis (CS) and spark plasma sintering (SPS)

Combustion synthesis of metal carbides: Part I. Model development

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