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International Journal of Energetic Materials and Chemical Propulsion

Publicou 6 edições por ano

ISSN Imprimir: 2150-766X

ISSN On-line: 2150-7678

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 0.7 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 0.7 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.1 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00016 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.18 SJR: 0.313 SNIP: 0.6 CiteScore™:: 1.6 H-Index: 16

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THERMOMECHANICAL COMBUSTION ENHANCER AND THE EFFECT OF COMBUSTION CATALYSIS ON THE BURN RATE AND INFRARED RADIATION OF MAGNESIUM-FLUOROCARBON-VITON PYROLANTS

Volume 19, Edição 4, 2020, pp. 341-373
DOI: 10.1615/IntJEnergeticMaterialsChemProp.2020033664
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RESUMO

A novel mechanism for combustion acceleration of pyrotechnics and solid propellants is introduced. The effect is based on mechanical action at the combusting surface leading to an increased effective surface area. The mass conversion rate increases, although the microscopic level burn rate (BR) is unaffected. Approximately a 70% and 80% acceleration of the burn rate from 3.6 to 6.1 mm/s and from 2.6 to 4.7 mm/s were observed, respectively, when 1% of expandable graphite (ExG) was mixed into an Magnesium-Teflon®-Viton® (MTV) and Magnesium-Graphite fluoride-Viton (MGV) containing 15% binder and consolidated to 95% of theoretical maximum density (TMD). A fourfold increase of the effective burn rate from 28 to 109 mm/s was achieved at a 85% consolidation at normal pressure with compositions containing 5% binder, a chemical catalyst, carbon fibers, a higher porosity, and a larger percentage of expandable graphite. Presumably, intumescent materials can accelerate any solid phases energetic material combustion, provided the surface temperature exceeds the expansion onset temperature of the intumescent material. The effect of thermomechanical and chemical combustion acceleration on the infrared (IR) band radiation energy of MTV is investigated. Expandable graphite enhances the IR performance of MTV even beyond that of graphite fluoride (GF) based compositions while chemical catalysis reduces the IR energy in most cases. Only soot combustion catalysts slightly increase the radiated energy compared to baseline MTV. The accelerating effect of expandable graphite can be addressed to mechanical action, thermal conduction, enhanced radiative feedback while its decelerating effect is caused by increased absorption and shielding of radiation.

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CITADO POR
  1. Kudryashova Olga, Lerner Marat, Vorozhtsov Alexander, Sokolov Sergei, Promakhov Vladimir, Review of the Problems of Additive Manufacturing of Nanostructured High-Energy Materials, Materials, 14, 23, 2021. Crossref

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