Quantitative characterization of degree of mixedness of lova grains

Yazici, Rahmi; Kalyon, Dilhan M.

doi:10.1080/07370659608216058

Cited by 11 publications

(7 citation statements)

References 11 publications

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“…Less appreciated is the fact that the degree of mixing achieved by the mixing process influences k to a significant degree. While there is a large body of knowledge about mixing of high solids composites in such separate areas as solid rocket fuels and propellants [7][8][9][10], electrically conductive compounds [11], composites [12,13] and soaps [14], little if anything has been reported about mixing of thermal pastes. In this paper, we review the relevant facts which apply to the mixing of thermal pastes.…”

Section: Introductionmentioning

confidence: 99%

Mixing, rheology, and stability of highly filled thermal pastes

et al. 2005

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Section: Introductionmentioning

confidence: 99%

Mixing, rheology, and stability of highly filled thermal pastes

et al. 2005

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“…For a two-phase material (with absorption coefficients l 1 and l 2 for the individual phases), the absorption coefficient for the mixture becomes [1,2,[8][9][10]:…”

Section: Twin-screw Extrusion Of Nanoparticlesmentioning

confidence: 99%

“…The difference between the mean concentration, c c and the known overall concentration, /, of an ingredient (minor or the major component) is indicative of the quality of the Twin-Screw Extrusion of Nanoparticles sampling technique [1,2,[8][9][10]. This difference between c c and / diminishes as the number, N, of the characterized samples increases.…”

mentioning

confidence: 99%

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Twin-Screw Extrusion of Nano-Alumina–Based Simulants of Energetic Formulations Involving Gel-Based Binders

Ozkan

Gevgilili

Kalyon

et al. 2007

Journal of Energetic Materials

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A 7.5-mm twin-screw extruder was developed specifically for the processing of energetic formulations involving nanoparticles. Prior to extrusion of energetic formulations, simulants of CMC, water, and alumina nanoparticle gels were extruded. Quantitative measures of degree of mixedness (statistics of concentration distributions) were obtained on samples processed with the twin-screw extruder and with conventional processing methods using wide-angle X-ray diffraction (WAXD) and thermo-gravimetric analysis (TGA) and were corroborated with microscopy. Twin-screw extrusion process generated more homogeneous mixtures of nanoparticles than conventional (intensive batch) mixing technologies and the use of surfactants further improved the homogeneity. With increasing homogeneity the suspension exhibited lower elasticity and shear viscosity. Overall, the results of this study emphasize the important roles played by the surface properties of rigid particles, the interfacial tension between the particles and the binder, and the rheological behavior of the binder. In the absence of properly selected binder and surfactant(s), the processing of nanoparticles, without agglomeration, is difficult to achieve. This finding may be relevant to the evaluation of past efforts, which have aimed to improve the ultimate properties of energetic formulations by incorporating nanoparticles.

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“…From a military point of view, there is another consideration: high sensitivity means high vulnerability, for example to nearby impacts of projectiles. Thus, concepts like LOVA [97] have been created, leading to propellant and explosive formulations with reduced sensitivity.…”

Section: Application Of Nanotechnology For Insensitive Munitionsmentioning

confidence: 99%

Review on Promising Insensitive Energetic Materials

Badgujar¹

2017

Cent. Eur. J. Energ. Mater.

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During the last twenty years military explosives, and energetic materials in general, have changed significantly. Worldwide, research and development programs are active in developing promising insensitive HEMs with higher performance. This has been due to several factors, which include new operational requirements such as Insensitive Munitions (IM), but it is also due to the availability of new materials and to new assessment and modelling techniques. The present review focuses on the basic idea and necessity for IM, and the conditions, technical requirements and tests for IM. The review also explains the various promising insensitive high explosives, their synthesis and formulation used in different propellants.

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Quantitative characterization of degree of mixedness of lova grains

Cited by 11 publications

References 11 publications

Mixing, rheology, and stability of highly filled thermal pastes

Mixing, rheology, and stability of highly filled thermal pastes

Twin-Screw Extrusion of Nano-Alumina–Based Simulants of Energetic Formulations Involving Gel-Based Binders

Review on Promising Insensitive Energetic Materials

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