Monitoring of Aluminum Nanopowder Combustion Ignited by Laser Radiation

Li, Lin; Mostovshchikov, A. V.; Il’in, A. P.; Gubarev, Fedor A.

doi:10.2528/pierl18022102

Cited by 8 publications

(7 citation statements)

References 12 publications

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“…Works [7][8][9] were devoted to the use of laser monitors based on copper bromide vapor active medium for studying various aluminum-containing mixtures of nano-and micron metal powders. In the previous works [7][8][9][17][18][19], we observed the side surface of a massive sample (up to 3 g) located vertically.…”

Section: Introductionmentioning

confidence: 84%

“…To study horizontally placed layers of aluminum nanopowder, it is necessary to illuminate the sample from above. Because of the design features of metal vapor active elements, their placement in a vertical position is practically impossible; therefore, the laser monitor scheme [18] was modified. Fig.…”

Section: Methodsmentioning

confidence: 99%

“…In [17], we demonstrated the possibility of using a low-intensity laser monitor to study the combustion of aluminum nanopowder. In [18], the possibility of observing laser ignition of aluminum nanopowder using such a system was demonstrated. Works [7][8][9] were devoted to the use of laser monitors based on copper bromide vapor active medium for studying various aluminum-containing mixtures of nano-and micron metal powders.…”

Section: Introductionmentioning

confidence: 99%

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Laser Monitor for Studying the Combustion of Thin Layers of Metal Nanopowders

Gubarev¹,

Mostovshchikov²,

Fedorov³

et al. 2021

PIER M

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In this paper, we propose a laser monitor with a horizontally located observation area for studying laser initiation and combustion of thin layers of metal nanopowders. Three configurations of the optical scheme with different inputs of igniting laser radiation and different magnifications are considered. Visualization of combustion of a 0.4 mm layer of aluminum nanopowder demonstrated the possibility of studying the surface of a nanopowder thin layer during combustion using a laser monitor. The bright glowing of the sample and the bright radiation of the igniting laser do not interfere with the imaging of the surface. The proposed system allows us to study surface changes caused by the propagation of combustion waves. It is demonstrated that in the region of laser initiation, combustion proceeds in one-stage, and combustion products are formed during laser action. Outside the initiation area, combustion proceeds in two stages. The results reveal the prospects for designing a laser monitor for studying the combustion of thinner layers of metal nanopowders.

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Section: Introductionmentioning

confidence: 84%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Laser Monitor for Studying the Combustion of Thin Layers of Metal Nanopowders

Gubarev¹,

Mostovshchikov²,

Fedorov³

et al. 2021

PIER M

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“…1 представлена схема для исследования высокотемпературного горения с использованием лазерного монитора. В дополнение к традиционной схеме лазерного монитора [12][13][14], предложенная схема включала лазер для инициирования горения и быстродействующие фотодиоды для регистрации средней яркости усиленного отраженного света от поверхности объекта, а также момент начала инициирования. Изображение в данной схеме формировалось объективом с фокусным расстоянием 8 см.…”

Section: методы и материалыunclassified

“…Лазер как источник монохроматического излучения имеет узкую полосу генерации и усиления [7]. Использование активных оптических систем с усилением яркости на основе активных сред на парах металлов (лазерных мониторов) всистемах неразрушающего контроля позволяет эффективно подавить интенсивную фоновую засветку и исследовать характеристики высокотемпературных процессов [8][9][10][11][12][13][14]. В работе [10], лазерный монитор применялся для наблюдения угольной дуги с температурой выше 3000ºС.…”

Section: Introductionunclassified

Laser System for Studying the Dynamics of High Temperature Combustion

Gubarev

Mostovshchikov

et al. 2019

Interexpo GEO-Siberia

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The paper is devoted to development of methods for studying the dynamics of high-temperature combustion of aluminum nanopowder.The difficulty in studying the combustion of nanopowders is the high temperature and intensity of light emissionduring the combustion process, which makes the visual observation virtually impossible.The paper discusses various schemes using laser radiation to study the combustion processes of metal nanopowders.Particular mentions the use of the laser monitor based on an active medium on copper bromide vapor to study the combustion process of various powders and mixtures.The laser monitor combines the functions of the narrow-band laser illuminator and the brightness amplifier, thereby achieving the visualization at a narrow gain wavelength. Therefore, the laser monitor can be used to observe the changes in the surface of a burning sample with high temporal and spatial resolution.

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Study on Melting and Deflagration of Nanometer-Sized Indium Particle Thin Films by Temperature-Dependent Ellipsometry

Liu

Shan

et al. 2020

J. Phys. Chem. C

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The melting and deflagration of nanometer indium particle thin films with an average diameter of 43.2 nm were characterized by temperature-dependent ellipsometry. During ellipsometric measurement, the sample temperature varied from room temperature to 270 °C. Two sharp breakpoints in the temperature-dependent curves of ellipsometric parameters were found at 155 and 251 °C, respectively. The former sharp breakpoint at 155 °C is ascribed to a physical phase change from solid to liquid, and the later one at 251 °C is due to the chemical phase change from liquid indium to solid indium oxide. The temperature of 251 °C is just the deflagration point of liquid indium particles, which was observed with temperature-dependent ellipsometric measurement for the first time. The results given by ellipsometry were further confirmed by conventional measurements of differential scanning calorimeter, thermogravimetric analysis, and X-ray diffraction. Compared with conventional measurements, the ellipsometric method is more sensitive and effective.

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Monitoring of Aluminum Nanopowder Combustion Ignited by Laser Radiation

Cited by 8 publications

References 12 publications

Laser Monitor for Studying the Combustion of Thin Layers of Metal Nanopowders

Laser Monitor for Studying the Combustion of Thin Layers of Metal Nanopowders

Laser System for Studying the Dynamics of High Temperature Combustion

Study on Melting and Deflagration of Nanometer-Sized Indium Particle Thin Films by Temperature-Dependent Ellipsometry

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