Laser‐Induced Ignition and Combustion of Al−Mg Alloy Powder Prepared by Melt Atomization

Yang, Yihang; Hou, Fengting; Li, Shengji; Zhao, Qin; Zhao, Fengqi

doi:10.1002/prep.202000058

Cited by 23 publications

(7 citation statements)

References 42 publications

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“…The Mg microparticles were prepared by melt atomization technique presented in our previous work [14]. The morphology of as-prepared Mg microparticles was characterized by SEM (Quanta 600FEG, Thermo Fisher Scientific, Waltham, MA, USA), as shown in Figure 1.…”

Section: Methodsmentioning

confidence: 99%

Combustion of Laser-Induced Individual Magnesium Microparticles under Natural Convection

et al. 2021

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Metal magnesium (Mg) fuels have been widely used in rocket propellants. The combustion study on individual Mg microparticles is crucial to the in-depth unveiling of the combustion mechanism of Mg-based propellants. In this paper, a new experimental setup was proposed to directly observe the combustion of individual micron-sized Mg particles, based on laser ignition and microscopic high-speed cinematography. The combustion process of individual Mg microparticles could be directly and clearly observed by the apparatus at high temporal and spatial resolutions. Individual Mg microparticles took gas phase combustion, and mainly underwent four stages: expansion, melting, gasification, ignition, and combustion. The ignition delay time and total combustion time had an exponential decay on the particle diameter, and they had a linear decay on the ignition power density. The melting took a dominant role in the whole burnout time. The gas-phase combustion flame seemed thick, inhomogeneous, and ring-like structure. The combustion model of individual Mg microparticles was built through combining the experimental results with the SEM, XRD, XPS, and EDS analysis of original samples and combustion residues. This study will be beneficial to understand the combustion process and reveal the combustion mechanism of metal microparticles besides Mg.

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Section: Methodsmentioning

confidence: 99%

Combustion of Laser-Induced Individual Magnesium Microparticles under Natural Convection

et al. 2021

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“…Tremendously, the TMPD-TXBQ cocrystals can be triggered by a cheap and compact low-power handheld CW NIR laser (Figure S10), instead of an expensive and bulky pulsed laser or high-power CW or pulsed NIR laser. [16][17][18]37 Benefiting from the low atmospheric attenuation of the laser light and the very low required input energy for initiating the expansion, the remote trigger-off of TMPD-TBBQ can be readily achieved over a distance of 4 m by utilizing the 808 nm laser (0.6 W) (Figure 3a). In addition, the excellent penetrating ability of the NIR laser light allows the encapsulated TMPD-TBBQ in three layers of polypropylene tubes to successfully trigger the 808 nm laser (0.6 W) from the outside (Figure 3b), indicating that the heat emission of the TMPD-TXBQ cocrystals can be triggered when these materials are wrapped with transparent packing materials.…”

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confidence: 99%

“…Therefore, the threshold input power density for triggering the expansion of the TMPD-TBBQ cocrystals is estimated to be only 260 mW·cm –2 (Figure S13). Tremendously, the TMPD-TXBQ cocrystals can be triggered by a cheap and compact low-power handheld CW NIR laser (Figure S10), instead of an expensive and bulky pulsed laser or high-power CW or pulsed NIR laser. − , …”

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confidence: 99%

Near-Infrared Light Triggered a High Temperature Utilizing Donor–Acceptor Cocrystals

Chen

Dang

Situ

et al. 2022

J. Phys. Chem. Lett.

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Developing a suitable initiation for the energetic materials that respond to a low-power near-infrared laser can aid in replacing the current expensive and bulky laser-initiation systems. Here, we report on a system of molecularly tailored 1:1 donor–acceptor (D-A) charge-transfer (CT) cocrystals that manifest ultrabroad absorption (200–2500 nm) characteristics as well as noteworthy very fast self-assembly behaviors. The very narrow highest occupied molecular orbital–lowest unoccupied molecular orbital gap enables N,N,N′,N′-tetramethyl-p-phenylenediamine and tetrahalo-1,4-benzoquinones (TMPD-TXBQ) cocrystals to have a great light-harvesting ability in the near-infrared range. When irradiated with a low-power hand-held 808 nm laser with an input energy of only 40 mJ or a power density of 260 mW·cm–2, these TMPD-TXBQ cocrystals immediately undergo an efficient photothermal conversion followed by a dramatic exothermic thermal polymerization reaction due to the face-to-face D-A-D-A stacking in these cocystals to achieve a temperature as high as 318.9 °C. This temperature is high enough for a thermal initiation of most common energetic materials, and thus this TMPD-TXBQ cocrystal can potentially act as a near-infrared laser initiator that is compact, lightweight, and cost-effective.

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“…Wainwright et al [12] reported micro-explosions of Al-Zr composite particles and found that in air, the presence of N2 induced micro-explosions by acting as a source of rapid bubble formation and growth. Huang et al [13] studied the ignition and combustion characteristics of single-particle Al-Mg alloy and Al-Mg alloy powder pile, respectively, and explained the reason for the phased combustion of Al-Mg alloy from the mechanism.…”

Section: Introductionmentioning

confidence: 99%

Study on laser ignition and combustion characteristics of micron-sized aluminum and Al-Mg alloys particles

Hou,

Zhang,

Feng

et al. 2024

J. Phys.: Conf. Ser.

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In response to the problems of easy sintering and long ignition delay time of micron aluminum in the combustion of aluminum-containing propellants, choose the way to add magnesium to metal aluminum to construct an alloy system, through boiling, micro-explosions are generated during the ignition and combustion process to weaken the sintering behavior and shorten the ignition delay time of aluminum. Selecting aluminum and Al-Mg alloy powder fuel with a particle diameter of about 10 μm as the research object, a set of individual-particle fuel laser ignition and microscopic high-speed imaging experimental devices was built that can observe the whole process of ignition and combustion of micron-sized fuel. Thermal analysis was used to detect and characterize the thermal decomposition process of micron-sized aluminum and Al-Mg alloy powders; combined with the results of scanning electron microscopy, the difference in ignition performance of micron-sized individual particle aluminum and Al-Mg alloys was studied. Experiments have found that, compared with aluminum, the initial oxidation temperature of Al-Mg alloys is lower and the combustion is more complete. However, the effect of adding magnesium to aluminum is only reflected before 900 °C. The ignition and combustion images and flame propagation laws of micron-sized single-particle aluminum and Al-Mg alloys were obtained. It was found that adding magnesium shortened the ignition delay time, and the combustion produced less residual.

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Laser‐Induced Ignition and Combustion of Al−Mg Alloy Powder Prepared by Melt Atomization

Cited by 23 publications

References 42 publications

Combustion of Laser-Induced Individual Magnesium Microparticles under Natural Convection

Combustion of Laser-Induced Individual Magnesium Microparticles under Natural Convection

Near-Infrared Light Triggered a High Temperature Utilizing Donor–Acceptor Cocrystals

Study on laser ignition and combustion characteristics of micron-sized aluminum and Al-Mg alloys particles

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