On the mechanism of zirconium nitride formation by zirconium, zirconia and yttria burning in air

Malikova, Ekaterina; Pautova, Julia; Gromov, Alexander A.; Моногаров, Константин А.; Ларионов, К. Б.; Teipel, Ulrich

doi:10.1016/j.jssc.2015.07.007

Cited by 6 publications

(4 citation statements)

References 39 publications

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“…This is probably due to the Al 2 O 3 shell thickening, reducing the metallic aluminium content inside the particle. Thus, the smaller amount of Al inside the Al 2 O 3 shell for an aged particle heated faster and ignited more easily in comparison with the non-aged particle where the amount of Al metal was larger [42]. This experimental phenomenon was also confirmed for µAl particles: aged powders were easily ignited and burnt in air while fresh ones did not [43].…”

Section: Experimental Data On the Nal Slow Oxidationmentioning

confidence: 56%

“…However at higher oxidation rates on combustion in air, the interaction of aluminium with nitrogen and the subsequent production of AlN should also be taken into account (reaction 4) [42,43]. Nitride formation by aluminium oxidation in air at low oxidation rates (0.5-20.0 K/min) has never been reported in the literature [42,43,57].…”

Section: Analysis Of Powder Characteristics and Their Comparison Withmentioning

confidence: 99%

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Nanoaluminium: is there any Relationship between Powder Particles’ Size, Non-Isothermal Oxidation Data and Ballistics?

Gromov¹,

Teipel²

2017

Cent. Eur. J. Energ. Mater.

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This article focuses on data analyses and comparisons for aluminium nanopowders (or nanoaluminium, nAl) reactions under slow (0.5-20.0 K/min, using DTA/DSC/TGA) and fast (>10000 K/min, combustion in solid propellant formulations) non-isothermal oxidation. Particle sizes were defined through the BET method. Active Al content was related with the averaged reactivity parameters, taken from published DTA/DSC/TGA data. The specific oxidation onset temperature for nAl was poorly correlated with the BET particle size under the conditions investigated. Furthermore, the BET particle size exhibited no correlation with the observed ballistic response (burning rate) at 3.0 MPa. A logarithmic correlation y = 17.484 ln(x) -5813, with R² = 0.73, was found between nAl particle size and its aluminium content. A calibration equation for the oxidation onset temperature as a function of nAl particle size was determined as y = −0.0071x 2 + 3.3173x + 479.32, with R² = 0.75. Specific features of the nAl (metallic aluminum content in nAl and the oxidation onset temperature) can be predicted based on the measured powder parameters (such as BET particle size).

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Section: Experimental Data On the Nal Slow Oxidationmentioning

confidence: 56%

Section: Analysis Of Powder Characteristics and Their Comparison Withmentioning

confidence: 99%

Nanoaluminium: is there any Relationship between Powder Particles’ Size, Non-Isothermal Oxidation Data and Ballistics?

Gromov¹,

Teipel²

2017

Cent. Eur. J. Energ. Mater.

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“…However, the fundamental flaws of zirconium powders, such as lower energy density than aluminum, and the high melting point (1852 °C), have limited the application and development of zirconium. Further, the zirconium powder is not sufficiently burned in the air, a large amount of unburned metal remains in the combustion products [21,22]. Thus, it is significant to develop ZrAl 3 /Al composite fuels.…”

Section: Introductionmentioning

confidence: 99%

Preparation, Microstructure and Thermal Property of ZrAl₃/Al Composite Fuels

Zou

Shi

et al. 2019

Propellants Explo Pyrotec

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ZrAl 3 /Al composite fuels x = 10,20,30, 40, 50, 53 wt.%) were prepared by the non-consumable arcmelting technique and close-coupled gas-atomization. In order to study the effects of the zirconium content and the oxygen partial pressure on the thermal properties of composite fuels, X-ray diffraction, scanning electron microscopy, TG-DTA and DSC were used to characterize the composite fuels, respectively. The result shows that the addition of zirconium leads to the formation of a special structure inside the powder, promoting the oxidation of ZrAl 3 /Al composite fuels. Besides, non-selective oxidation of ZrAl 3 played an important role in promoting the oxidation process. The oxygen bomb experiment was conducted to evaluate the combustion performance of ZrAl 3 /Al composite fuels. Oxygen bomb experiments show that the gravimetric combustion enthalpy of the composite fuels decreases linearly with the increase of zirconium content, and increases with the increase of oxygen partial pressure. However, the volumetric combustion enthalpy decreases first and then increases with the increase of zirconium content, and shows a general upward trend when the partial pressure of oxygen reaches 2.5 MPa or more. The pressure curve indicates that the Al-53Zr composite fuels have the maximum pressure propagation rate (dP/dt) max (which characterizes the maximum flame propagation rate and higher energy releasing rates) in the prepared series of composite fuels. The study demonstrates a complete combustion of ZrAl 3 /Al composite fuels under high pressure. ZrAl 3 /Al composite fuels could be considered as a very promising energetic additive in the field of new-energetic material.

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“…There are intensive scientific researches and industrial experimental works on coal gasification technology development in many countries around the world because of constant growth of prices [1] and decrease of natural gas deposits [2], and also high finding costs on new deposits, and the received products are able to fully change natural gas [4].…”

Section: Introductionmentioning

confidence: 99%

Study of Electrophysical Intrastratal Gasification at Different Coal Heating Rate

Ларионов

Korjashov

Jankovskij

et al. 2015

MATEC Web of Conferences

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Experimental instrumental multi-method research, electrophysical ihtrastratal gasification of antracite with further definition of quantitative syngas composition and its combustion heat design at different heating rates. It was stated that concentration of carbon dioxide СО2, hydrogen H2 decreases with heating rate increase in received syngas, and there is rise of carbon monoxide СО concentration. The results of the research showed that heating rate increase leads to a small rise of combustion heat as decrease of H2 and CH4 concentration is compensated with increase of CO.

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On the mechanism of zirconium nitride formation by zirconium, zirconia and yttria burning in air

Cited by 6 publications

References 39 publications

Nanoaluminium: is there any Relationship between Powder Particles’ Size, Non-Isothermal Oxidation Data and Ballistics?

Nanoaluminium: is there any Relationship between Powder Particles’ Size, Non-Isothermal Oxidation Data and Ballistics?

Preparation, Microstructure and Thermal Property of ZrAl₃/Al Composite Fuels

Study of Electrophysical Intrastratal Gasification at Different Coal Heating Rate

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On the mechanism of zirconium nitride formation by zirconium, zirconia and yttria burning in air

Cited by 6 publications

References 39 publications

Nanoaluminium: is there any Relationship between Powder Particles’ Size, Non-Isothermal Oxidation Data and Ballistics?

Nanoaluminium: is there any Relationship between Powder Particles’ Size, Non-Isothermal Oxidation Data and Ballistics?

Preparation, Microstructure and Thermal Property of ZrAl3/Al Composite Fuels

Study of Electrophysical Intrastratal Gasification at Different Coal Heating Rate

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Product

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Preparation, Microstructure and Thermal Property of ZrAl₃/Al Composite Fuels