Self-propagating explosive Al/Ni flakes fabricated by dual-source sputtering to mesh substrate

Matsuda, Takanori; Inoue, Shozo; Namazu, Takahiro

doi:10.7567/jjap.53.06jm01

Cited by 7 publications

(10 citation statements)

References 28 publications

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“…This reaction, in which exotherm is generated even on the high temperature side, could be the exothermic reaction between Al and Ti. [27][28][29][30] As is known, the affinity of Ti with oxygen increases at about 800 °C. Since the Al 2 O 3 crucible in the Pt container was used in this experiment, the exothermic reaction was possibly generated by absorbing oxygen not only from SiO 2 but also from Al 2 O 3 .…”

Section: Mechanism Of Changing Exothermic Characteristics By Sio 2 Re...mentioning

confidence: 90%

Effect of molten salt reduction on exothermic characteristics of titanium/reduced-silica nanoparticles

Shindo¹,

Kumakiri²,

Terasawa³

et al. 2021

Jpn. J. Appl. Phys.

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This paper describes the effect of molten salt reduction on exothermic characteristics of Ti/reduced-SiO2 nanoparticles. Sputtered Ti/Si multilayer film is known to show exothermic reaction by electrical shock or mechanical impact during intermetallic compound formation. So far, we demonstrated that SiO2/Ti nanoparticles, which are produced by combining atomized heating for porous SiO2 nanoparticle and sputtering for Ti deposition, show exothermic reaction. if an amount of oxygen in SiO2 nanoparticles can be changed, it is expected that exothermic characteristics can be controlled more accurately. In this paper, the effect of reduction on exothermic reaction is investigated, and the mechanism of the reduced effect is discussed based on the result of differential scanning calorimetry analysis.

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Section: Mechanism Of Changing Exothermic Characteristics By Sio 2 Re...mentioning

confidence: 90%

Effect of molten salt reduction on exothermic characteristics of titanium/reduced-silica nanoparticles

Shindo¹,

Kumakiri²,

Terasawa³

et al. 2021

Jpn. J. Appl. Phys.

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“…The exothermic performances like heat energy and maximum surface temperature can be controlled by deposition condition. In the case of Al/Ni multilayer film with the atomic ratio of 1:1 and the bilayer thickness of 100 nm, the heat of energy reaches to 1300 J/g [133]. The propagation speed depending on the atomic ratio of Al to Ni is around 10 m/s.…”

Section: Materials Characteristicsmentioning

confidence: 99%

Mechanical Property Measurement of Micro/Nanoscale Materials for MEMS: A Review

Namazu

2022

IEEJ Transactions Elec Engng

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By virtue of a great progress of semiconductor fabrication technologies, micro electro‐mechanical systems (MEMS) have been developed for a wide variety of industries. For reliability of MEMS, micromaterials in MEMS need to be examined experimentally, and the obtained results need to be reflected in the design of MEMS. In addition, with the benefit of such the MEMS technology, nowadays mechanical characteristics of nanomaterials have been evaluated precisely. Nanoscale mechanical testing provides an opportunity to find new unique physical phenomena, such as plastic deformation in Si at intermediate temperatures. In this review paper, mechanical testing technologies developed for investigating micro and nanoscale materials are reviewed. Then, mechanical characteristics of Si and other materials evaluated using the micro and nano mechanical testing technologies are introduced. © 2022 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

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“…This premixed region decreases the amount of energy obtainable from the reaction. As bilayer thickness decreases, the premixed region creates a larger volume fraction in the multilayers which lead to greater energy losses [45,46]. Further, Gavens et al explained the premixed region in AlNi multilayers system where Al 9 Ni 2 formed instead of the final phase Al 3 Ni 2 [43].…”

Section: Reaction Propagation Velocitymentioning

confidence: 99%

“…The starting particle size of the system also impacts the grain size of the end products. Further, Matsuda et al [46] compared the heat of reaction on multilayer AlNi flakes and AlNi multilayer foils which were deposited by DC magnetron sputtering.…”

Section: Reaction Propagation Velocitymentioning

confidence: 99%

Size Dependent Properties of Reactive Materials

2022

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The nature of the self-sustained reaction of reactive materials is dependent on the physical, thermal, and mechanical properties of the reacting materials. These properties behave differently at the nano scale. Low-dimensional nanomaterials have various unusual size dependent transport properties. In this review, we summarize the theoretical and experimental reports on the size effect on melting temperature, heat capacity, reaction enthalpy, and surface energy of the materials at nano scale because nanomaterials possess a significant change in large specific surface area and surface effect than the bulk materials. According to the theoretical analysis of size dependent thermodynamic properties, such as melting temperature, cohesive energy, thermal conductivity and specific heat capacity of metallic nanoparticles and ultra-thin layers varies linearly with the reciprocal of the critical dimension. The result of this scaling relation on the material properties can affect the self-sustained reaction behavior in reactive materials. Resultant, powder compacts show lower reaction propagation velocities than bilayer system, if the particle size of the reactants and the void density is decreased an increase of the reaction propagation velocity due to an enhanced heat transfer in reactive materials can be achieved. Standard theories describing the properties of reactive material systems do not include size effects.

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Self-propagating explosive Al/Ni flakes fabricated by dual-source sputtering to mesh substrate

Cited by 7 publications

References 28 publications

Effect of molten salt reduction on exothermic characteristics of titanium/reduced-silica nanoparticles

Effect of molten salt reduction on exothermic characteristics of titanium/reduced-silica nanoparticles

Mechanical Property Measurement of Micro/Nanoscale Materials for MEMS: A Review

Size Dependent Properties of Reactive Materials

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