Diamond-like amorphous carbon and nanocrystalline diamond obtained by detonation method

Breusov, O. N.; Abrosimova, G. A.; Ananiin, A. V.; Аронин, А. С.; Дробышев, В. Н.; Tatsii, V. F.; Ponyatovsky, E.G.

doi:10.1080/08957959608240471

Cited by 3 publications

(4 citation statements)

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“…The diamond-like amorphous carbon with the density of ρ = 2.99 g cm −3 was obtained from fullerene using shock-wave compression and the rapid-quenching technique [45,46]. Diamond-like amorphous carbon with the density of 2.7-3.42 g cm −3 was also obtained by detonation of a mixture of an explosive with graphite [47]. We accept some average value for the model constant, V 0 = −2.4 cm 3 mol −1 .…”

Section: Carbonmentioning

confidence: 99%

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A thermodynamic approach toT–Pphase diagrams of substances in liquid and amorphous states

Ponyatovsky

2003

J. Phys.: Condens. Matter

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The metastable phase equilibria of substances in the disordered, liquid or amorphous, state are considered in T–P coordinates. Application of the thermodynamic model of pseudo-binary solutions is illustrated by means of calculated metastable T–P phase diagrams of water, carbon, and semiconducting compounds, GaSb and Ga38Sb38Ge24. All calculated diagrams include the equilibrium lines between the disordered phases terminating at the critical points and the stability boundaries of these phases, the spinodals. Depending on the mutual disposition of the elements of the stable and metastable T–P diagrams, two additional lines of metastable equilibria between the crystalline high-pressure phase and each of the metastable disordered phases can appear. These lines terminate at the points of intersection with spinodals. These special points are denoted as pseudo-critical points. A combined analysis of the stable and metastable diagrams gives a reasonable interpretation of the experimental data on the phase transformations and on the nature of the anomalous properties of the substances in question as well as allowing prediction of some new effects.

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Section: Carbonmentioning

confidence: 99%

“…There have been many experiments on carbon in the form of graphite or fullerenes and subjected to high-pressure treatment at elevated temperatures (see [37,[45][46][47]49]). It is surprising, however, that the transitions between graphite-like glass and diamond-like glass have been studied least.…”

Section: Carbonmentioning

confidence: 99%

A thermodynamic approach toT–Pphase diagrams of substances in liquid and amorphous states

Ponyatovsky

2003

J. Phys.: Condens. Matter

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“…Generally, an analysis of the results of [10,11] and many other papers, for example [27,28], leads to the conclusion that:…”

Section: Introductionmentioning

confidence: 96%

“…There is also a third approach to the detonation synthesis of diamond, in which, along with HE, graphite or carbon black, special carbon-containing additives are introduced into the charge to increase the detonation parameters of the charge. In this case, not only graphite or carbon black but also the carbon of the additives is transformed to diamond [10,11]. According to [11], using the third approach, an amorphous diamond-like form of carbon was produced in a significant amount.…”

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confidence: 99%

Structure and properties of Dalan detonation diamonds

Tatsii

Bochko

Oleinik

2009

Combust Explos Shock Waves

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This paper presents the results of an investigation of the fine crystal structure of Dalan diamonds synthesized from graphite and carbon black by detonation. The phase composition of the diamond powders was found to vary widely; the structural and structural-morphological states of diamond particles were studied. The main types and subtypes of detonation diamonds are characterized according to transmission electron microscopy data. Assumptions are made concerning diamond formation during detonation synthesis. INTRODUCTIONAt present, the production of diamond powders by using detonation synthesis (DS) is of scientific and practical significance. The first is determined by the importance of knowing the physical nature of the formation of nanodispersed diamond particles, and the second is related to the solution of the problem of producing submicron-sized and nanosized diamond powders of uniform particle size. Such powders can be used both as the starting product and to produce nanodispersed ultrahard compact and composite materials.It is known that the detonation synthesis of diamond is based on the two main technological approaches which differ in the nature of the starting nondiamond carbon. The first approach uses the starting carbon in the form of graphite or carbon black [1][2][3][4][5] in a mixture with a high explosive (HE), and the second uses the socalled own carbon formed by the decomposition of a HE. In the second case, mixtures of TNT and RDX are more often used [6][7][8][9]. There is also a third approach to the detonation synthesis of diamond, in which, along with HE, graphite or carbon black, special carbon-containing additives are introduced into the charge to increase the detonation parameters of the charge. In this case, not only graphite or carbon black but also the carbon of the additives is transformed to diamond [10,11]. According to [11], using the third approach, an amorphous diamond-like form of carbon was produced in a significant amount. The diamonds synthesized in [1-5 and 10, 11] using the first approach are referred to by the abbreviations DAG and DAS, and those produced by the third approaches are referred to as DAP; the abbreviations contain information on the nature of the starting carbon and the diamond produced.The diamond synthesized using the second approach (from the carbon of HE molecules) is referred to as ultrafine diamond in the literature. Data on the processes and structural mechanisms of synthesis of this diamond and its properties and regions of application are generalized and discussed in detail in books [12][13][14] and overviews [15][16][17].The detonation synthesis of diamond from graphite and carbon black have been less studied than that of ultrafine diamond, but, nevertheless, the main data on the nature of this process and structural conversions of the starting nondiamond carbon to diamond have been obtained. In particular, the detonation parameters necessary for the synthesis of diamond and the dependence of these parameters on the type of HE, the concentration ...

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Detonation Transformation in Materials

Бацанов

2018

Shock and Materials

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Diamond-like amorphous carbon and nanocrystalline diamond obtained by detonation method

Cited by 3 publications

References 3 publications

A thermodynamic approach toT–Pphase diagrams of substances in liquid and amorphous states

A thermodynamic approach toT–Pphase diagrams of substances in liquid and amorphous states

Structure and properties of Dalan detonation diamonds

Detonation Transformation in Materials

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