Abstract
A preliminary account of the X-ray topographic characterization of the growth-induced dislocation structure in single crystals of the secondary explosives pentaerythritol tetranitrate and cyclotrimethylene trinitramine is presented. Dislocations in the former material are observed to be straight whereas in the latter a substantial amount of dislocation motion is observed. These contrasting dislocation structures are discussed with reference to the mechanical properties of the materials. The possible contributions of dislocation slip and climb mechanisms to dislocation motion are considered.
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