A possible mechanism of nanodiamond formation during detonation synthesis

A new mechanism of formation of nanodiamond particles during detonation synthesis has been put forward. It includes the following steps: (a) decomposition of trinitrotoluene (TNT) molecules into basic radicals-a radical-like dimer C 2 and CO 3 , decomposition of hexogen molecules into C 2 and of ben...

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Bibliographic Details
Published inJournal of superhard materials Vol. 35; no. 3; pp. 143 - 150
Main Authors Dolmatov, V. Yu, Myllymäki, V., Vehanen, A.
Format Journal Article
LanguageEnglish
Published Heidelberg Allerton Press, Inc 01.05.2013
Subjects
Chemistry
Chemistry and Materials Science
Physical Chemistry
Production
Properties
Structure
shock wave
mechanism of formation
adamantane
radicals
chemical peak zone
detonation nanodiamonds
cyclohexane
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Summary:A new mechanism of formation of nanodiamond particles during detonation synthesis has been put forward. It includes the following steps: (a) decomposition of trinitrotoluene (TNT) molecules into basic radicals-a radical-like dimer C 2 and CO 3 , decomposition of hexogen molecules into C 2 and of benzotrifuroxane molecules into C 2 ; (b) formation of cyclohexane from C 2 or immediately of radical adamantane molecules; (c) interaction of diamond-like core (adamantane radical) with methyl and other monocarbon radicals; and (d) growth of detonation nanodiamond particles like in a CVD process. It is shown that the nucleation of a radical-like adamantine molecule occurs within a range between the center of the chemical peak zone and the Chapman-Jouguet plane, the growth of diamond particles takes place at the same time and comes to an end at an early stage of isoentropic (Taylor) expansion of detonation gases entrapping solid carbon particles.
ISSN:1063-4576
1934-9408
DOI:10.3103/S1063457613030039