OPTICAL MICROSCOPY AND SMALL-ANGLE SCATTERING STUDY OF POROSITY IN THERMALLY TREATED PBX 9501

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Heat transfer and comlmstion properties of a high explosive (HE) are influenced by the HE microstructure. The development of voids and cracks in an HE system under the conditions of thermal loading can have a strong impact on the safety and reliability of a weapon system. The optical microscopy and small angle x-ray scattering (SAXS) techniques are useful tools for microstructural characterization. A combination of the tools allows lengthscales from hundreds of microns to tenths of nanometers to be probed, allowing a thorough description of a system's microstructure to be made. We present an optical microscopy and SAXS study of ... continued below

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6 p.

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Mang, J. T. (Joseph T.); Skidmore, C. B. (Cary B.); Hjelm, R. P. (Rex P.); Ricker, T. P. (Thomas P.) & Son, S. F. (Steven F.) January 1, 2001.

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Description

Heat transfer and comlmstion properties of a high explosive (HE) are influenced by the HE microstructure. The development of voids and cracks in an HE system under the conditions of thermal loading can have a strong impact on the safety and reliability of a weapon system. The optical microscopy and small angle x-ray scattering (SAXS) techniques are useful tools for microstructural characterization. A combination of the tools allows lengthscales from hundreds of microns to tenths of nanometers to be probed, allowing a thorough description of a system's microstructure to be made. We present an optical microscopy and SAXS study of the effects of thermal loading on the microstructure of PBX 9501. Pressed pellets of PBX 9501, an HMX-based system, were heated in an oven at 180 'C for periods of 0, 15 and 30 minutes. Optical micrographs reveal the developmenit of large pores in the microstructure with increasing thermal treatment as well as increased cracking and morphological changes of crystal grains, associated with the beta to delta phase transition in HMX. SAXS measurements were performed in order to quantify the observed porosity,

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6 p.

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  • Submitted to: 12 Biennial International Conference of the Aps Topical Group on Shock Compression of Condensed Matter, June 24-June 29, 2001, Atlanta, Georgia, USA.

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  • Report No.: LA-UR-01-3379
  • Grant Number: none
  • Office of Scientific & Technical Information Report Number: 975575
  • Archival Resource Key: ark:/67531/metadc935201

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 1, 2001

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  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 12, 2016, 12:37 p.m.

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Mang, J. T. (Joseph T.); Skidmore, C. B. (Cary B.); Hjelm, R. P. (Rex P.); Ricker, T. P. (Thomas P.) & Son, S. F. (Steven F.). OPTICAL MICROSCOPY AND SMALL-ANGLE SCATTERING STUDY OF POROSITY IN THERMALLY TREATED PBX 9501, article, January 1, 2001; United States. (digital.library.unt.edu/ark:/67531/metadc935201/: accessed October 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.