Abstract
The values of the unit cell (UC) parameter were measured and elements of the internalstructure were determined in polycrystalline diamond films (PDFs) using x-ray diffraction.It was established that the values of the UC parameter were connected with the dislocationdensities in mosaic PDF crystallites. The dislocation density was calculated from measuredmicrodistortions and dispersion in the blocks based on the surface stretch forces thatarise on the boundaries between blocks. This allowed more precise computing ofthe dislocation density. A similar connection between the UC parameter anddislocation density also exists in epitaxial diamond films and in plastic deformednatural type IIb and Ic diamonds. A regular relationship between physical valuesof the UC parameter and dislocation density in mosaic diamond materials wasdetermined using mathematical modelling. An increase in the dislocation densityresults in a decrease in the UC parameter from 0.356 689 nm in more pure andperfect type IIa diamonds to a limiting value of 0.356 42 nm in PDF samples.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call