Investigation on Impact Initiation Characteristics of Fluoropolymer-matrix Reactive Materials

Zhou, Jie; He, Yuehui; He, Yong; Wang, Chuan Ting

doi:10.1002/prep.201700003

Cited by 27 publications

(11 citation statements)

References 22 publications

(22 reference statements)

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“…As the content of W or other metal particles increase, the plasticity of the material would decrease [36]. In the process of compression, the materials undergo greater degrees of fracture and fragmentation rather than plastic deformation [37]. Thus, the reaction extent and rate are improved.…”

Section: Effect Of Tmdmentioning

confidence: 99%

Bulk Density Homogenization and Impact Initiation Characteristics of Porous PTFE/Al/W Reactive Materials

Geng

Wang

et al. 2020

Materials

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In this research, the bulk density homogenization and impact initiation characteristics of porous PTFE/Al/W reactive materials were investigated. Cold isostatic pressed (CIPed) and hot temperature sintered (HTSed) PTFE/Al/W reactive materials of five different theoretical maximum densities were fabricated via the mixing/pressing/sintering process. Mesoscale structure characteristics of the materials fabricated under different molding pressures were compared while the effect of molding pressures on material bulk densities was analyzed as well. By using the drop weight testing system, effects of the theoretical maximum densities (TMDs), drop heights and molding pressures on the impact initiation characteristics were studied. Quantitatively, characteristic drop heights (H50) for different types of materials were obtained. The two most significant findings of this research are the density homogenization zone and the sensitivity transition zone, which would provide meaningful guides for further design and fabrication of reactive materials.

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Section: Effect Of Tmdmentioning

confidence: 99%

Bulk Density Homogenization and Impact Initiation Characteristics of Porous PTFE/Al/W Reactive Materials

Geng

Wang

et al. 2020

Materials

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“…In recent experiments following the same general approach, the RSM was packed into a reactive bullet, as a reactive fragment inside a steel shell . The impact initiation behavior of Al/PTFE RSMs with added tungsten was investigated.…”

Section: Characterization Of Rsmsmentioning

confidence: 99%

Reactive Structural Materials: Preparation and Characterization

Hastings

Dreizin

2017

Adv Eng Mater

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Reactive structural materials, which can serve both as structural elements as well as a source of chemical energy released upon initiation have emerged as an important class of metal-based composites for use in various energetic systems. Such materials rely on a variety of exothermic reactions, from oxidation to formation of metal-metalloid and intermetallic phases. The rates of these reactions are as important as the energy that may be released, in order for them to occur at the time scales compatible with the requirements of applications. Therefore, chemical composition, scale at which reactive components are mixed, and the structure and morphology of materials are important and can be controlled by the method of preparation and compaction of the composite materials. Methods of preparation of the composite structures are briefly reviewed as well as methods of characterization of their mechanical and energetic properties. In addition to common thermo-analytical and static mechanical property measurements, dynamic tests of mechanical properties as well as ignition and combustion experiments are necessary to understand the fragmentation, initiation, and heat release expected for these materials when they are stimulated by an impact, shock, or rapid heating. Reaction mechanisms are studied presently for the thin layers and small samples of reactive materials initiated in carefully designed experiments. In other experiments, impact and explosive initiation are characterized for larger material compacts in the conditions imitating practical scenarios. Examples of results describing thermal, impact, and explosive initiation of some of the reactive materials are presented.

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“…By drawing on the energy release test method of explosives (i.e., the characteristic drop height method), the strain rate threshold of reactive materials with different composition ratios was obtained. Zhou [ 19 ] carried out a series of tests on the energy release capacity of PTFE/Al/W reactive material in a quasi-closed vessel and obtained the pressure-time curves of the reactive material inside the vessel after chemical reaction under different impact velocities, thus deriving the chemical reaction degree of the reactive material corresponding to each working condition. Ge [ 20 ] carried out a series of light gas gun tests on PTFE/Al reactive materials, studying the impact reaction thresholds and impact induction mechanism of PTFE/Al reactive materials under different impact loading conditions.…”

Section: Introductionmentioning

confidence: 99%

Research on the Constitutive Model of PTFE/Al/Si Reactive Material

Lee

Cui²,

Tang

et al. 2022

Polymers

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As a new type of energetic material, reactive materials are widely used at present; in particular, the metal/polymer mixtures type reactive materials show great advantages in engineering applications. This type of reactive material has good mechanical properties, and its overall performance is insensitive and high-energy under external impact loading. After a large number of previous studies, our team found that the energy release characteristics of PTFE/Al/Si reactive material are prominent. In order to master the mechanical properties of PTFE/Al/Si reactive materials, the quasi-static mechanical properties and dynamic mechanical properties were obtained by carrying out a quasi-static compression test and a dynamic SHPB test in this paper. Based on the experimental data, a Johnson-Cook constitutive model of PTFE/Al/Si reactive material considering strain hardening effect, strain rate hardening effect and thermal softening effect was constructed. The relevant research results will be used to guide future research on the reaction mechanism of PTFE/Al/Si reactive materials, in order to promote the engineering application of PTFE/Al/Si reactive materials.

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Investigation on Impact Initiation Characteristics of Fluoropolymer-matrix Reactive Materials

Cited by 27 publications

References 22 publications

Bulk Density Homogenization and Impact Initiation Characteristics of Porous PTFE/Al/W Reactive Materials

Bulk Density Homogenization and Impact Initiation Characteristics of Porous PTFE/Al/W Reactive Materials

Reactive Structural Materials: Preparation and Characterization

Research on the Constitutive Model of PTFE/Al/Si Reactive Material

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