Syntheses of ‘Hemtex’ Simulants of Energetic Materials and Millimetre Wave Characterisation Using the Teraview CW400 Spectrometer: Fundamental Studies for Detection Applications

AbstractExplosives or energetic materials are hazardous, expensive and difficult to handle safely. As such there is a need for simulant explosive materials in order to conduct work without these issues being present. This chapter describes characterisation of a set of simulant materials with respect to millimetre wave and submillimetre wave threat detection technologies. The properties examined were the real and imaginary parts of the relative permittivity. The simulants are based on a modular approach to design appropriate chemical and physical properties which mimic explosives. Collectively, these materials are referred to as Hemtex and can be tailored to match various requirements. The subset of Hemtex materials used in this study were designed to reflect the properties of Semtex and the results of the characterisation showed promise for use as Semtex substitutes.

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Manufacturing and Evaluating for the Two Layer/Explosive Materials and their Numerical Simulations

Materials Science Forum ◽

10.4028/www.scientific.net/msf.767.52 ◽

2013 ◽

Vol 767 ◽

pp. 52-59 ◽

Cited By ~ 1

Author(s):

See Jo Kim ◽

Sang Ho Mun ◽

Kee Ahn Lee ◽

Chang Hee Lee ◽

Seong Lee

Keyword(s):

Mechanical Properties ◽

Numerical Modeling ◽

Energy Transfer ◽

Modeling And Simulation ◽

Energetic Materials ◽

Experimental Evaluation ◽

Explosive Materials ◽

Numerical Modeling And Simulation ◽

Materials Used ◽

Al Coating

Combination of different materials used in the liner of the shaped charge is of great importance in designing for maximization of energy transfer. In general, a Cu liner is widely used for the special purpose in military as well as in industry. The reactive Cu liners require excellent mechanical properties and reactivity of the energetic materials. Pure Al powders are widely known as energetic materials. In this regard, the integrated work was done based on the three procedures. First, the kinetic-sprayed Al coating was fabricated on Cu substrate to generate a reactive Cu liner. And the reactivity, bonding and mechanical properties of kinetic-sprayed Al coatings were investigated. Second, the experimental evaluation of kinetic-sprayed Al coatings in terms of the strain rate. Finally numerical modeling and simulation were carried outand discussed for visibility validation.

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Chemical and Physical Properties of Limestone Powder as a Potential Microfiller of Polymer Composites

Archives of Civil Engineering ◽

10.1515/ace-2017-0017 ◽

2017 ◽

Vol 63 (2) ◽

pp. 67-78 ◽

Cited By ~ 2

Author(s):

M. Kępniak ◽

P. Woyciechowski ◽

W. Franus

Keyword(s):

Electron Microscope ◽

Scanning Electron Microscope ◽

Physical Properties ◽

Polymer Composites ◽

Asphalt Mixture ◽

Limestone Powder ◽

Coarse Aggregates ◽

Mineral Powder ◽

Materials Used ◽

Scanning Electron

Abstract The preliminary stage of asphalt mixture production involves the drying and dedusting of coarse aggregates. The most common types of coarse aggregates used are limestone and basalt. In the process of drying and dedusting the dryer filter accumulates large quantities of waste in the form of mineral powder. This paper introduces an investigation into limestone powder waste as a potential microfiller of polymer composites. Physical characteristics such as the granulation the of powder collected from the filter - in terms of the season of its collection and the type of input materials used - were analysed. A scanning electron microscope (SEM) was used for the investigation described within this paper. The obtained results were compared against those of other materials which can be used as polymer composites microfillers.

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The Effects of Physical Properties of Fibers in Nettle Fiber/Polyester Composites on the Thermal Conductivity Coefficient

Academic Perspective Procedia ◽

10.33793/acperpro.01.01.145 ◽

2018 ◽

Vol 1 (1) ◽

pp. 834-842

Author(s):

Murat Koru ◽

Kenan Büyükkaya

Keyword(s):

Thermal Conductivity ◽

Composite Materials ◽

Physical Properties ◽

Thermal Conductivity Coefficient ◽

The Black Sea ◽

Stinging Nettle ◽

Fiber Concentration ◽

Black Sea Region ◽

Polyester Composites ◽

Materials Used

The physical properties of the materials used are also important in the thermal conduction, besides many other factors. In this study, nettle fiber/polyester composites were formed using stinging nettle grown in the Black Sea region. The stinging nettle fibers used in the formation of these composites were divided into three parts as bottom, middle, and top. The physical properties (diameter, density, crystallinity) of the fibers obtained from different parts of the plant and how the increased fiber concentration affected the thermal conductivity coefficients of the composite materials formed were studied. As a result, it was observed that the thermal conductivity coefficients of the composites increased with the increase of the crystallinity ratio of the fiber. Moreover, the increased fiber concentration significantly increased the thermal conductivity coefficient of the composite materials produced.

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Comparison of the Physical Properties of Dental Restorative Materials Used in Endodontics

Bioceramics 20 - Key Engineering Materials ◽

10.4028/0-87849-457-x.841 ◽

2007 ◽

pp. 841-844

Author(s):

T. Watanabe ◽

Kimitoshi Ando ◽

T. Ito ◽

Naritaka Kitamura ◽

Kazuhiko Nakata ◽

...

Keyword(s):

Physical Properties ◽

Dental Restorative Materials ◽

Restorative Materials ◽

Materials Used ◽

Dental Restorative

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Some physical properties of materials used in constructing calorimeters

Animal and Human Calorimetry ◽

10.1017/cbo9780511663161.014 ◽

1988 ◽

pp. 311-311

Keyword(s):

Physical Properties ◽

Properties Of Materials ◽

Materials Used

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Esterases affect the physical properties of materials used to seal the endodontic space

Dental Materials ◽

10.1016/j.dental.2019.04.011 ◽

2019 ◽

Vol 35 (8) ◽

pp. 1065-1072

Author(s):

M.Q. Marashdeh ◽

S. Friedman ◽

C. Lévesque ◽

Y. Finer

Keyword(s):

Physical Properties ◽

Properties Of Materials ◽

Materials Used

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Viability of Some Kano-Nigerian Clays for Refractory Applications

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.315.477 ◽

2013 ◽

Vol 315 ◽

pp. 477-481 ◽

Cited By ~ 2

Author(s):

I.A. Rafukka ◽

B. Onyekpe ◽

Y. Tijjani

Keyword(s):

Compressive Strength ◽

Physical Properties ◽

Bulk Density ◽

Thermal Shock ◽

Thermal Shock Resistance ◽

Linear Shrinkage ◽

Chemical Compositions ◽

Shock Resistance ◽

Materials Used ◽

Refractory Bricks

The physical properties of some materials used by local foundries were investigated with a view to assessing their suitability for use as low heat duty refractory bricks. The samples were collected from Malamai village, Gezawa Local Government, Kano state; they are Gezawa clay and Burji (Clay). The samples were crushed, ground, sieved and the chemical compositions were determined. The clay samples were treated separately as well as blended with Gezawa clay in different proportions and molded in to bricks. The bricks were dried and fired to 1100. Test for refractoriness, thermal shock resistance, linear shrinkage; bulk density, porosity and compressive strength were carried out on each of the specimen. Burji blended with 50% to 90% Gezawa clay gave improved thermal shock resistance with a refractoriness of 1300 and hence could be used for non ferrous melting cupolas.

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Analysis of Impact of Selected Structure Parameters of Reinforcing Preforms for Metal-Matrix Composites on their Saturation Process

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.334-335.219 ◽

2013 ◽

Vol 334-335 ◽

pp. 219-224

Author(s):

Dorota Nagolska ◽

Katarzyna Gawdzińska

Keyword(s):

Physical Properties ◽

Metal Matrix Composite ◽

Metal Matrix Composites ◽

Mathematical Description ◽

Metal Matrix ◽

Geometrical Structure ◽

Structure Parameters ◽

Matrix Composites ◽

Properties Of Materials ◽

Materials Used

The process of saturation of reinforcement preforms for metal-matrix composite castings is dependent on many different factors. One group of these factors is related to the process of manufacturing of metal-matrix composites with saturated reinforcement. Another group is related to the physical properties of materials used for manufacturing of such composites. The structure of reinforcement preforms is one of such factors. Due to its complexity, its mathematical description is difficult to perform. This structure can be examined and described using physical properties like porosity or permeability. During the conducted analysis presented in the paper, it was checked whether there is a relation between studied physical properties of reinforcement preforms and a degree of their saturation. It was also determined, which of the studied parameters is the best for description of an influence of the geometrical structure of reinforcement preforms on the process of their saturation and in consequence, on the porosity of the obtained composite castings.

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