Investigation of the kinetics of the reaction between tantalum and oxygen by the ignition method

Gal'chenko, Yu. A.; Grigor’ev, Yu. M.

doi:10.1007/bf01464180

Cited by 3 publications

(2 citation statements)

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“…The extreme conditions discussed above (i.e., high temperatures and heating rates) make it difficult to study the intrinsic kinetics of chemical reactions during CS. The only technique known to date that can simulate the conditions of a combustion wave and directly measure the rate of species interaction is the so-called electrothermography method, which was developed originally to study oxidation processes . Its basic idea is that metal wires are heated in a reactive gas atmosphere in a controlled manner by passing electric current, and then by measuring time-dependence characteristics of electric power applied to the wire, one may extract the reaction kinetics.…”

Section: Introductionmentioning

confidence: 99%

“…The only technique known to date that can simulate the conditions of a combustion wave and directly measure the rate of species interaction is the so-called electrothermography method, which was developed originally to study oxidation processes. 13 Its basic idea is that metal wires are heated in a reactive gas atmosphere in a controlled manner by passing electric current, and then by measuring time-dependence characteristics of electric power applied to the wire, one may extract the reaction kinetics. Note that a similar approach has also been utilized for the kinetics of gassolid catalytic reactions.…”

Section: Introductionmentioning

confidence: 99%

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Kinetics of Rapid High-Temperature Reactions: Titanium−Nitrogen System

Pelekh

Mukasyan

Varma

1999

Ind. Eng. Chem. Res.

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We have developed a computer-assisted electrothermography method to determine the intrinsic kinetics of reactions under conditions similar to those realized during combustion synthesis of materials. In this method, metal wires are heated in a reactive gas atmosphere in a controlled manner by passing electric current, and when time-dependence characteristics of electric power applied to the wire are measured, the reaction kinetics can be extracted. To illustrate the technique, it is applied to investigate the kinetics and other features associated with the reaction of titanium with nitrogen at 1 atm of pressure. The temperature range 1400−2300 K and heating rates 104−105 K/s are studied. It is shown that at temperatures below the melting point of titanium, the reaction follows a parabolic rate law, corresponding to a sharp-interface model with nitrogen diffusion through the developing titanium nitride layer as the rate-controlling step. The obtained activation energy value (230 kJ/mol) is in good agreement with this model. At higher temperatures, however, the reaction mechanism is different because of faster diffusion of nitrogen in molten titanium. In addition, the reaction rate is shown to depend strongly on the heating rate and on the heat pretreatment of titanium.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Kinetics of Rapid High-Temperature Reactions: Titanium−Nitrogen System

Pelekh

Mukasyan

Varma

1999

Ind. Eng. Chem. Res.

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The deposition and analysis of pyrotechnic devices deposited by magnetron sputtering

Kelly

Tinston

Arnell

1993

Surface and Coatings Technology

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Electrothermography apparatus for kinetics of rapid high-temperature reactions

Pelekh¹,

Mukasyan²,

Varma³

2000

Review of Scientific Instruments

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A computer-assisted electrothermography setup has been developed to determine the intrinsic kinetics of rapid heterogeneous reactions under conditions of high heating rate. In this method, metal wires are heated in a reactive gas atmosphere to desired temperature in a controlled manner by passing electric current, and then by measuring time-dependence characteristics of electric power applied to the wire, the reaction kinetics is extracted. The described setup allows heating rates up to 3×105 K/s and permits investigation of reaction kinetics over time scale of few milliseconds to seconds. Other applications are also possible that require fast heating and temperature control.

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Investigation of the kinetics of the reaction between tantalum and oxygen by the ignition method

Cited by 3 publications

References 4 publications

Kinetics of Rapid High-Temperature Reactions: Titanium−Nitrogen System

Kinetics of Rapid High-Temperature Reactions: Titanium−Nitrogen System

The deposition and analysis of pyrotechnic devices deposited by magnetron sputtering

Electrothermography apparatus for kinetics of rapid high-temperature reactions

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