Studies of the interaction of copper with atomic and molecular oxygen

Gusakov, A. G.; Voropayev, A.G.; Zheludkevich, Mikhail L.; Vecher, A.A.; Raspopov, Sergei A.

doi:10.1039/a905829j

Cited by 23 publications

(18 citation statements)

References 5 publications

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“…In this figure, it can be observed that as the temperature increases further, the oxidation rate increases. This behavior is similar to that found for the interaction of silver [10] and copper [12] and with atomic oxygen. In the DOPA sample, k was calculated using the experimental values determined below 60% of the complete oxidation of the Zn, since Eq.…”

Section: Resultssupporting

confidence: 84%

Complete Oxidation of Zinc Powder. Validation of Kinetics Models

Garcı́a¹,

Sánchez²,

Metz³

2008

Oxid Met

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The kinetics of complete oxidation of different samples of zinc powder by air has been investigated by thermogravimetric measurements under isothermal conditions in the range 973-1,173 K. Particles size was in the 63-80 lm range. We succeeded in carrying out the full oxidation of the powders far above the zinc-metal melting point (692.6 K). This phenomenon is linked to the presence of a thin ZnO layer which confines the liquid metal during the oxidation process. Two kinetics models have been verified. The apparent activation energies obtained from the Arrhenius law were 128 kJ mol -1 and 129 kJ mol -1 , respectively.

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Section: Resultssupporting

confidence: 84%

Complete Oxidation of Zinc Powder. Validation of Kinetics Models

Garcı́a¹,

Sánchez²,

Metz³

2008

Oxid Met

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“…The iron ribbons (2) were heated by passing an electrical current through them; this method of heating prevented the recombination of atomic oxygen on hot surfaces of the vacuum furnace. The sample temperature was measured by a welded K-type thermocouple (3). The voltage drop on the central, uniformly-heated part of the sample was measured using potential probes welded to the sample.…”

Section: Experimental Proceedingsmentioning

confidence: 99%

“…1,2 The oxidation rate of nickel and copper in atomic oxygen exceeds that in molecular oxygen by several orders of magnitude. 3 The most important and widely used construction materials are iron and steels of various compositions. To date, the oxidation of iron and some steels by molecular oxygen has been studied quite sufficiently over a wide range of temperature.…”

Section: Introductionmentioning

confidence: 99%

Influence of Oxygen Dissociation on the Oxidation of Iron

Zheludkevich

Gusakov

Voropaev

et al. 2004

Oxidation of Metals

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Kinetics of the oxidation of iron in fluxes of atomic and molecular oxygen have been studied over a wide temperature range from 573 to 1273 K. The influence of oxygen pre-dissociation on the oxidation rate was found negligible at 573-1073 K. At temperatures above 1073 K, when only FeO is formed, the rate of iron oxidation in atomic oxygen is substantially higher than that in molecular oxygen. Decarburization occurs during the first stage of oxidation of iron containing carbon. The rate of carbon elimination in atomic oxygen exceeds that in molecular oxygen due to the higher chemical potential of atomic gas.

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“…This reduction in thickness poses a threat to long term durability of components used in LEO. Materials such as copper will initially oxidize faster (1 million times faster) in the presence of atomic oxygen when compared to molecular oxygen [5]. Although the oxidation will slow down with time, the use of conductive copper coatings, nanosize wires and nanosize copper components may not be usable without protection in space applications.…”

Section: Introductionmentioning

confidence: 98%