Enhancement of energy release performance of Al–Ni composites by adding CuO

Huang, Caimin; Chen, Jin; Bai, Shuxin; Li, Shun; Tang, Yu; Liu, Xiyue; Ye, Yicong; Zhu, Li’an

doi:10.1016/j.jallcom.2020.155271

Cited by 18 publications

(8 citation statements)

References 32 publications

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“…Based on Equations ( 13) and ( 14), the time history curve of the internal energy of the spray gas is calculated as shown in Figure 10B. From Equation (15), the time history curve of the internal energy release rate of the spray gas is shown in Figure 10C. Compared with the gas energy release rate in Figure 9B, the change trend of the energy release rate for the spray gas coincides with the gas in the container.…”

Section: Quantitative Evaluation Of the Internal Energy E 2i Of The S...mentioning

confidence: 99%

“…The quantitative relationship between impact pressure and energy release behavior is established. Huang CM et al, 15,16 use Differential Scan Calorimetry (DSC) to study the effect of CuO on the energy release by Al-Ni composites. The results show that the oxidation of Al and Ni is accelerated by adding CuO, finally enhancing the energy release performance during high-speed impact, and the influence of the in-situ crystalline phases on the mechanical properties and energy release behaviors of Zr 55 Ni 5 Al 10 Cu 30 Bulk Metallic Glasses (BMGs) are evaluated.…”

Section: Introductionmentioning

confidence: 99%

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Quantitative reactive release energy models of Al/Teflon material during high velocity impact

Tang

Wang

Chen

et al. 2022

Intl J of Energy Research

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Summary The reactive release energy of Al/Teflon projectile impacting on steel plate has a theoretical significance to explain the mechanism of shock‐induced reaction and impact initiation threshold of fluoropolymer‐based reactive materials. During the process of impact‐reaction in quasi‐closed container, the distributions of initial kinetic energy and impact reactive release energy are attributed to the gas enthalpy change, enthalpy change of spray gas, the internal energy absorbed by the container wall and the residual kinetic energy of the unreacted debris. Based on theoretical and experimental analysis, the energies allocated to each part are evaluated quantitatively. The results show that when the impact velocities are 402, 458, and 514 m/s, the reactive release energies of Al/Teflon are 3.276, 4.193, and 4.663 kJ/g, respectively. With the increase of projectile's velocity, the gas energy in the container, the spray gas energy and the internal energy absorbed by the container wall also increase, however the kinetic energy of the unreacted debris changes less. The internal energy absorbed by the container wall accounts for more than 90% of the total energy, and the total gas enthalpy change generated is less than 10%.

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Section: Quantitative Evaluation Of the Internal Energy E 2i Of The S...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Quantitative reactive release energy models of Al/Teflon material during high velocity impact

Tang

Wang

Chen

et al. 2022

Intl J of Energy Research

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“…[1][2][3][4] Various forms of thermite reactions are widely used in many composite materials to improve the thermal properties. [5][6][7][8][9] The thermite of an Al-F system has better exothermic performance compared with an Al-O system. The combustion heat of the Al-F reaction (about 20 kJ cm 3 ) can reach more twice than that of the traditional Al-O reaction, which is more than the detonation heat of some explosives (e.g., trinitrotoluene, cyclotrimethylenetrinitramine, and triamino-trinitrobenzene).…”

Section: Introductionmentioning

confidence: 99%

3D Printing of n‐Al/Polytetrafluoroethylene‐Based Energy Composites with Excellent Combustion Stability

Zheng

Huang

et al. 2021

Adv Eng Mater

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The development of 3D printing technology provides a new idea for the application of energy‐containing materials as functional reactive materials, which helps Al–F high‐energy materials to achieve customized performance and structure, so that energy transmit can be targeted. A high fuel‐load ink (up to 90 wt%) based on Al‐polytetrafluoroethylene (PTFE) is designed and fabricated using fluororubber (FR) as a binder. The content of FR is directly related to the mechanical properties of ink, and the customized structure from the uniform and stable deposition can be obtained by adjusting the content of FR (10–20 wt%). Under the display of high‐speed photography, the ink shows a strong stability in combustion performance, which is conducive to realize the performance customization of the ink in the application. To better understand the combustion mechanism, the thermal properties and combustion process are analyzed in brief through thermal analysis and the combustion snapshots.

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“…Among these shapes, the core− shell structure has received extensive attention because of its unique properties, including highly specific surface area, controllable pore size, uniform distribution, excellent exothermicity as well as compatibility with MEMS systems. 10,27,28 The latter method focuses on accelerating the participation of Al in the reaction, such as reducing the fuel size, 29−31 multimetal fuels, 32,33 annealing and quenching aluminum, 13,34,35 and decomposing the alumina layer. 36,37 Among these methods of modifying fuels, reducing the aluminum size could bring many advantages, including fast reaction rate and low initial redox reaction temperature.…”

Section: Introductionmentioning

confidence: 99%

“… The former method focuses on the meticulous architecture design of the thermite system, realizing a variety of structural forms, for instance multilayered, ,− 3D macroporous, − and core–shell − structures. Among these shapes, the core–shell structure has received extensive attention because of its unique properties, including highly specific surface area, controllable pore size, uniform distribution, excellent exothermicity as well as compatibility with MEMS systems. ,, The latter method focuses on accelerating the participation of Al in the reaction, such as reducing the fuel size, − multimetal fuels, , annealing and quenching aluminum, ,, and decomposing the alumina layer. , Among these methods of modifying fuels, reducing the aluminum size could bring many advantages, including fast reaction rate and low initial redox reaction temperature . However, aluminum naturally develops a 3–5 nm alumina shell upon exposure to oxygen, which leads to reduced active aluminum content at smaller particle sizes, presenting a barrier to the interaction of aluminum with the oxidizer .…”

Section: Introductionmentioning

confidence: 99%

Pushing the Limits of Energy Performance in Micron-Sized Thermite: Core–Shell Assembled Liquid Metal-Modified Al@Fe₂O₃ Thermites

Chen

et al. 2021

ACS Appl. Energy Mater.

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Thermites are a class of significant energetic materials widely used in aerospace propulsion, explosion, pyrotechnics, thermal batteries, and power generation. Although nanothermites exhibit fast reaction rates and high energy density, micron-sized thermites remain of practical importance over nanothermites due to their low electrostatic discharge (ESD) sensitivity, lower cost, and smaller dead mass. Herein, we develop micron-sized core−shell gallium-based liquid metal-modified Al@Fe 2 O 3 (GLM-Al@ Fe 2 O 3 ), which exhibits high energy density and low laser ignition energy. At an equivalence ratio of 1.3, the differential scanning calorimetry results show that the total heat release of GLM-Al@Fe 2 O 3 reaches 2555 J•g −1 , which is much higher than that of the control sample (1424 J•g −1 ) prepared by a similar process. The density of GLM-Al@Fe 2 O 3 (φ = 1.3) was characterized by a gas pycnometer analyzer, and its volumetric energy density could reach 9.96 kJ•cm −3 . Laser-ignited combustion performance of GLM-Al@Fe 2 O 3 was markedly reinforced in terms of the decreased ignition energy. Additionally, the ESD ignition threshold of GLM-Al@ Fe 2 O 3 is higher than 1 J, which revealed that the as-prepared GLM-Al@Fe 2 O 3 was insensitive to electrostatic discharge. The facile and efficient strategy in this work provides inspiration to enhance the energy output performance and maintain the ESD safety of micron-sized thermites, which could show great potential in various civilian and military applications.

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Enhancement of energy release performance of Al–Ni composites by adding CuO

Cited by 18 publications

References 32 publications

Quantitative reactive release energy models of Al/Teflon material during high velocity impact

Quantitative reactive release energy models of Al/Teflon material during high velocity impact

3D Printing of n‐Al/Polytetrafluoroethylene‐Based Energy Composites with Excellent Combustion Stability

Pushing the Limits of Energy Performance in Micron-Sized Thermite: Core–Shell Assembled Liquid Metal-Modified Al@Fe₂O₃ Thermites

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Enhancement of energy release performance of Al–Ni composites by adding CuO

Cited by 18 publications

References 32 publications

Quantitative reactive release energy models of Al/Teflon material during high velocity impact

Quantitative reactive release energy models of Al/Teflon material during high velocity impact

3D Printing of n‐Al/Polytetrafluoroethylene‐Based Energy Composites with Excellent Combustion Stability

Pushing the Limits of Energy Performance in Micron-Sized Thermite: Core–Shell Assembled Liquid Metal-Modified Al@Fe2O3 Thermites

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Pushing the Limits of Energy Performance in Micron-Sized Thermite: Core–Shell Assembled Liquid Metal-Modified Al@Fe₂O₃ Thermites