Compacting Plastic-Bonded Explosive Molding Powders to Dense Solids PDF Download
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Author: B. Olinger
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Dense solid high explosives are made by compacting plastic-bonded explosive molding powders with high pressures and temperatures for extended periods of time. The density is influenced by manufacturing processes of the powders, compaction temperature, the magnitude of compaction pressure, pressure duration, and number of repeated applications of pressure. The internal density variation of compacted explosives depends on method of compaction and the material being compacted.
Author: B. Olinger
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Dense solid high explosives are made by compacting plastic-bonded explosive molding powders with high pressures and temperatures for extended periods of time. The density is influenced by manufacturing processes of the powders, compaction temperature, the magnitude of compaction pressure, pressure duration, and number of repeated applications of pressure. The internal density variation of compacted explosives depends on method of compaction and the material being compacted.
Author: Blaine Asay
Publisher: Springer Science & Business Media
ISBN: 3540879536
Category : Technology & Engineering
Languages : en
Pages : 630
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Book Description
Los Alamos National Laboratory is an incredible place. It was conceived and born amidst the most desperate of circumstances. It attracted some of the most brilliant minds, the most innovative entrepreneurs, and the most c- ative tinkerers of that generation. Out of that milieu emerged physics and engineering that beforehand was either unimagined, or thought to be f- tasy. One of the ?elds essentially invented during those years was the science of precision high explosives. Before 1942, explosives were used in munitions and commercial pursuits that demanded proper chemistry and con?nement for the necessary e?ect, but little else. The needs and requirements of the Manhattan project were of a much more precise and speci?c nature. Spatial and temporal speci?cations were reduced from centimeters and milliseconds to micrometers and nanoseconds. New theory and computational tools were required along with a raft of new experimental techniques and novel ways of interpreting the results. Over the next 40 years, the emphasis was on higher energy in smaller packages, more precise initiation schemes, better and safer formulations, and greater accuracy in forecasting performance. Researchers from many institutions began working in the emerging and expanding ?eld. In the midst of all of the work and progress in precision initiation and scienti?c study, in the early 1960s, papers began to appear detailing the ?rst quantitative studies of the transition from de?agration to detonation (DDT), ?rst in cast, then in pressed explosives, and ?nally in propellants.
Author: R Prummer
Publisher: CRC Press
ISBN: 1482294338
Category : Science
Languages : en
Pages : 206
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Book Description
This monograph discusses in detail the compacting conditions and the resultant structure and properties of metals, composites and ceramics. It covers the basic aspects of science and technology of explosive compaction. Comprise chapters on Shock Waves in Matter, Technology of Explosive Compaction, Explosive Compaction of Metallic Powders, Explosive
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 312
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Book Description
The slurry process for producing plastic bonded explosives (PBX) has been used for many years. However, until recently the mechanisms involved have not been studied quantitatively to determine the effects of the various control variables. Recently, the effects of operating variables on the final product have been studied; however, no attempt was made to measure particle growth during the slurry process. This study applies an image analysis tool to measure particle size distributions (PSDs) during the slurry process to produce PBX 9501, a specific formulation used in nuclear weapons. The observed PBX 9501 slurry behavior leads away from the typical population balance description of agglomeration, that is, a discrete particle-particle coalescence mechanism. The behavior observed in these experiments indicates that the initial state of the system contains a number of smaller particles clustered together. The cluster then coalesces into a large particle as solvent is removed and the slurry continuously mixed. Other small fragments are picked up and a relatively small amount of growth is observed. A mass transfer model adequately describes solvent removal, and an empirical model is developed to describe the growth behavior in terms of measured process variables. The image system is applied to dried molding powders. The PSD measurement results of the PBX 9501 library lots, historic samples set aside as PBX 9501 lots were accepted from the manufacturer, are also discussed and analyzed. A correlation analysis was conducted to find relationships between the measured PSD and other properties such as bulk density and pressed densities. While no significant correlation was found between the measured PSD and averaged bulk densities for the library lots, significant correlations are found between the measured PSD and pressed density. The final part of the study was to scale-up the PSD measurement capability. Since the large-scale processes are not yet operational, this work makes recommendations for future consideration. Also, some additional small-scale experiments are recommended as well as improvements to the smallscale experimental apparatus.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 22
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Book Description
Pressed plastic-bonded explosives, PBXs, are commonly used by defense and private industry. PBX 9501 is composed of HMX crystals held together with a plastic binder 'softened' with plasticizers. The detonation behavior of any explosive is very dependent upon its density, with the desire to have a uniform, high density throughout the explosive component. A parametric study has been performed pressing PBX 9501 hydrostatically and uniaxially. The effects of several pressing parameters on the bulk density and density profile, as well as mechanical properties, have been measured. The parameters investigated include pressure, temperature, number of cycles, dwell time, rest time, sack thickness, and particle distribution and size. Density distributions within the pressed explosives were also compared.
Author:
Publisher:
ISBN:
Category : Metallurgy
Languages : en
Pages : 1076
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Book Description
Author: Terry R. Gibbs
Publisher: Univ of California Press
ISBN: 9780520040120
Category : Technology & Engineering
Languages : en
Pages : 471
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Book Description
Author: United States. Patent and Trademark Office
Publisher:
ISBN:
Category : Patents
Languages : en
Pages : 1156
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 962
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Book Description
Author:
Publisher:
ISBN:
Category : Chemistry
Languages : en
Pages : 938
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Book Description
Alphabetical arrangement of entries that reflect current topics of interest to scientists, chemists, and engineers, e.g., health, safety, toxicology, and new materials. Comprehensive coverage. Each entry consists of lengthy signed article, with illustrations and bibliography.
