Self-propagating high-temperature synthesis of nanostructured aluminum nitride powder with the use of aluminum fluoride and sodium azide

Titova, Yu. V.; Shiganova, Ljudmila; Maidan, D. A.; Bichurov, G. V.

doi:10.3103/s1067821214020199

Cited by 6 publications

(2 citation statements)

References 2 publications

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“…The reinforcing phase of the composite represented a powdered product consisting of a mixture of nanopowder of aluminum nitride (59.5 %) with cryolite Na 3 AlF 6 (30.5 %). This product was obtained by the SHS-Az technology from the charge AlF 3 +NaN 3 , and cryolite was not added to the charge but resulted from the SHS-Az reaction as a by-product [38]. Aluminum nitride in this powder mixture represents nanofibers with an average diameter of about 100 nm (Fig.…”

Section: Methods Of Studymentioning

confidence: 99%

Fabrication of Al-AlN Nanocomposites

Амосов

Titova

Timoshkin

et al. 2016

KEM

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A review of the methods of obtaining and properties of aluminum matrix composites, discretely reinforced with ceramic particles and nanoparticles of aluminum nitride AlN, is given. The survey shows that at low weight, nanocomposites Al-AlN possess improved physical and mechanical properties, including at high temperatures up to 400-550°C, which makes them very attractive for applications in automotive, aerospace and semiconductor technology. However, due to the long duration and energy consumption, expensive and complicated equipment, low productivity of existing solid-phase methods of powder metallurgy and liquid-phase metallurgical processes of fabrication of nanocomposites of Al-AlN, there are not yet the mastered technologies of industrial production of these composites. Azide technology of self-propagating high-temperature synthesis (SHS-AZ) using sodium azide NaN3 as a solid nitriding reagent allows you to get relatively inexpensive nanopowder of aluminum nitride in the form of nanofibers along with side salt of cryolite Na3AlF6, which can play the role of flux when working with molten aluminum. A new simple ex-situ method of introduction of AlN particles in the molten aluminum alloy in the form of a composite master alloy obtained by fusing together a flux carnallite KCl·MgCl2 with AlN nanopowder mixed with cryolite Na3AlF6 was proposed. Results of experiments on the application of the proposed method for obtaining nanocomposite with matrix made of aluminum-magnesium alloy AlMg6 containing up to 1 % of the reinforcing phase AlN are presented.

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Section: Methods Of Studymentioning

confidence: 99%

Fabrication of Al-AlN Nanocomposites

Амосов

Titova

Timoshkin

et al. 2016

KEM

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“…The traditional SHS of nitrides and filtration combustion of metal powders in nitrogen are experimentally studied under conditions of natural filtration in high pressure reactors, where, due to the pressure drop, the reaction gas is supplied to the combustion region [1][2][3][4][5][6][7][8][9][10]. There is a different type of filtration combustion in which the reacting gas is forced into the combustion zone and moves in the direction of combustion through the reaction products [11].…”

Section: Introductionmentioning

confidence: 99%

Process of Obtaining Chromium Nitride in the Combustion Mode under Conditions of Co-Flow Filtration

et al. 2020

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In this work, the combustion process of chromium powder in the co-flow filtration mode was studied. The effect of nitrogen-containing gas flow rate on the nitridation of combustion products is shown. The effect of the amount of argon in the nitrogen–argon mixture on the burning rate and the burning temperature of the chromium powder is shown. It was found that an increase in the percentage of argon in the nitrogen–argon mixture can lead to the formation of an inverse combustion wave. The actual burning temperature is higher than adiabatic burning temperature in the co-flow filtration mode, thus the phenomenon of superadiabatic heating is observed. The phase composition of the obtained combustion products was studied. It was shown that the forced filtration mode allows for synthesizing non-stoichiometric Cr2N nitride.

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Combustion synthesis of nitride powders: Part 1

Liu,

Chen,

2025

Combustion Synthesis

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Self-propagating high-temperature synthesis of nanostructured aluminum nitride powder with the use of aluminum fluoride and sodium azide

Cited by 6 publications

References 2 publications

Fabrication of Al-AlN Nanocomposites

Fabrication of Al-AlN Nanocomposites

Process of Obtaining Chromium Nitride in the Combustion Mode under Conditions of Co-Flow Filtration

Combustion synthesis of nitride powders: Part 1

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