Pyronol Torch - A Non-Explosive Underwater Cutting Tool

Rozner, A. G.; Helms, H. H.

doi:10.4043/2705-ms

Cited by 3 publications

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“…Compacts and nanostructures eliciting SHS reactivity are attractive because they can evolve very high temperatures with excellent spatial control. Applications for such materials include pyrotechnic, ignition, and incendiary systems, − liners for shaped charges, and bonding of electrical, mechanical, and thermal interfaces. − Moreover, the products of such combustion reactions (e.g., nickel aluminides) are potentially valuable in their own right as superalloys. The intrinsic heat of the alloying reaction may represent a convenient adjunct in near-net casting or so-called reactive laser sintering (RLS) of difficult-to-machine intermetallic superalloy parts. − …”

Section: Introductionmentioning

confidence: 99%

Reactive Bimetallic Nanostructures Based on Triply Periodic Minimal Surfaces: A Molecular Dynamics Study toward the Limits of Performance

Terrett

Frankcombe

2023

ACS Appl. Mater. Interfaces

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A variety of intermetallic compounds possesses high enthalpies of formation. These compounds may be formed from reactive compacts or nanostructures comprised of unreacted precursor metals. These precursor structures support self-propagating high temperature synthesis (SHS) reactions which afford very high specific energy densities and rates, with excellent spatial control and a variety of useful applications. The present work compares the reactivity of notional bimetallic nanostructures based on well-known triply periodic minimal surfaces (TPMSes) with the popular reactive nanolaminate (RNL) modality for the Ni/Al system, using a molecular dynamics approach. TPMS-derived nanostructures were found to have lower ignition energies and faster reaction rates than RNLs of comparable periodicity, while the maximum achievable temperature of ignitions was found to be modulated by a complex interplay of factors including reaction rate and specific metal/metal interface density. Nanostructure reactivity and thermochemistry is also affected by effective diffusion dimensionality and recalescent precipitation of intermetallic crystallites. The TPMS-derived reactive nanostructures presented herein anticipate plausible advances in nanofabrication technology.

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Section: Introductionmentioning

confidence: 99%

Reactive Bimetallic Nanostructures Based on Triply Periodic Minimal Surfaces: A Molecular Dynamics Study toward the Limits of Performance

Terrett

Frankcombe

2023

ACS Appl. Mater. Interfaces

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2011

Metal‐Fluorocarbon Based Energetic Materials

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Comparison of pyrometry and thermography for thermal analysis of thermite reactions

2021

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This study examines the thermal behavior of a laser ignited thermite composed of aluminum and bismuth trioxide. Temperature data were collected during the reaction using a four-color pyrometer and a high-speed color camera modified for thermography. The two diagnostics were arranged to collect data simultaneously, with similar fields of view and with similar data acquisition rates, so that the two techniques could be directly compared. Results show that at initial and final stages of the reaction, a lower signal-to-noise ratio affects the accuracy of the measured temperatures. Both diagnostics captured the same trends in transient thermal behavior, but the average temperatures measured with thermography were about 750 K higher than those from the pyrometer. This difference was attributed to the lower dynamic range of the thermography camera’s image sensor, which was unable to resolve cooler temperatures in the field of view as well as the photomultiplier tube sensors in the pyrometer. Overall, while the camera could not accurately capture the average temperature of a scene, its ability to capture peak temperatures and spatial data make it the preferred method for tracking thermal behavior in thermite reactions.

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Pyronol Torch - A Non-Explosive Underwater Cutting Tool

Cited by 3 publications

References 0 publications

Reactive Bimetallic Nanostructures Based on Triply Periodic Minimal Surfaces: A Molecular Dynamics Study toward the Limits of Performance

Reactive Bimetallic Nanostructures Based on Triply Periodic Minimal Surfaces: A Molecular Dynamics Study toward the Limits of Performance

Miscellaneous Applications

Comparison of pyrometry and thermography for thermal analysis of thermite reactions

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