Dislocation etching of cyclotrimethylene trinitramine crystals

Connick, William J.; May, Francine

doi:10.1016/0022-0248(69)90077-3

Cited by 57 publications

(36 citation statements)

References 7 publications

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“…Many of the crystals (Fig. 2a) exhibited a prismatic morphology (I) resembling that shown by Connick and May [10] for crystals grown from solution in acetone. The crystals exhibited +-(010) facets on either side of the [001] prism axis with the longest dimension usually being parallel to the [001], as identified from the analysis of Laue experiments to be discussed.…”

Section: Crystal Growthmentioning

confidence: 67%

“…4. (201) planes, respectively, relating to previous results [8][9][10]12] reported for RDX crystal morphologies, such tentative indices were initially determined as acceptable ones for the specific planes in each particular case. The choice of planes was then either confirmed or corrected according to the measurement of the traces of additional directions of plane intersections which were observed for adjacent crystal faces other than the (120) facet.…”

Section: Laue Diffraction Experimentsmentioning

confidence: 99%

“…Washing the sample before analysis somewhat lowered the HMX content indicating that the fine dust may contain HMX or that some HMX may be on the surface of the RDX crystals. For the present work, it is important to note that the RDX crystals described by Connick and May [10] were grown from RDX manufactured by the Woolwich Process which does not yield any HMX as a by-product.…”

Section: Chemical Analysismentioning

confidence: 99%

“…The crystal growth faces and their directions of intersection were identified. The morphologies are compared to RDX crystals of various polygonal shapes and sizes described in previous investigations [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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X-ray orientation and hardness experiments on RDX explosive crystals

1984

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RDX (cyclotrimethylenetrinitramine) explosive crystals, typically approaching 5 mm in size, were grown by evaporation from acetone solution using production-grade crystals as starting material. Two distinctly different morphologies resulted, including one that apparently has not been previously reported in other investigations. These morphologies were characterized using Laue X-ray diffraction methods and an optical trace analysis, both involving a stereographic projection description. Microindentation experiments were performed on different prominent growth surfaces of several selected laboratorygrown crystals having the conventional morphology type. The hardness results are compared with measurements made directly on several production-grade crystals having a different morphology, and are compared with preceding measurements on a crystal having the previously unreported morphology. The latter crystal exhibited highly localized plastic deformation at the indentations as revealed by dislocation etch-pitting. Observations are made regarding the dislocation structure and cleavage properties of RDX based on its orthorhombic unit cell.

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Section: Crystal Growthmentioning

confidence: 67%

Section: Laue Diffraction Experimentsmentioning

confidence: 99%

Section: Chemical Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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X-ray orientation and hardness experiments on RDX explosive crystals

1984

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“…The abovementioned experimental techniques, such as microindentation [66], nanoindentation [72], and etch-pitting [75], have revealed the (0 1 0) plane in RDX crystals to be the primary slip plane and [100] to be the cross-slip direction since it is shared by the (01 0), {021}, and {011} planes. The {011} and {021} planes are also considered as additional potential slip planes in RDX crystals.…”

Section: Cyclotrimethylenetrinitramine (Rdx) Crystalsmentioning

confidence: 99%

Indentation Plasticity and Fracture Studies of Organic Crystals

Mannepalli

Kiran

2017

Crystals

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This review article summarizes the recent advances in measuring and understanding the indentation-induced plastic deformation and fracture behavior of single crystals of a wide variety of organic molecules and pharmaceutical compounds. The importance of hardness measurement for molecular crystals at the nanoscale, methods and models used so far to analyze and estimate the hardness of the crystals, factors affecting the indentation hardness of organic crystals, correlation of the mechanical properties to their underlying crystal packing, and fracture toughness studies of molecular crystals are reviewed.

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