Physical conditions of the ‘light’ core formation and thermonuclear heat source deep inside the earth

Sobolev, V.V.; Bilan, N.V.

doi:10.29202/nvngu/2018-5/1

Cited by 3 publications

(3 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such vortex structures are char acterized by differential distribution of matter in vortex spirals according to density: lighter components (hydrogen, helium etc.) were mostly concentrated in the center, while heavier ones, like dust particles, were located on the vortex periphery [84,85]. Diamond particles, relics of protoplanetary matter, having "settled" in the Earth mantle, passed through the stag es of adaptation and conservation.…”

Section: A Ke Rs T E Rtmentioning

confidence: 99%

See 1 more Smart Citation

Compound physical and mechanical effects stimulating metastable diamond formation

Соболев¹,

Kovrov²,

Nalisko³

et al. 2021

Nauk. visn. nat. hirn. univ.

Self Cite

View full text Add to dashboard Cite

Purpose. To synthesize diamond polycrystals in a thermodynamically stable region, and to grow up a single crystal shell under conditions of thermodynamic metastability. To investigate some physical properties and features of the internal structure for synthesized single crystals for the development of new models and hypotheses regarding the issue of diamond genesis. Methodology. Experimental studies using shock-wave effects on a metal alloy containing non-diamond carbon. Methods of infrared and ultraviolet spectroscopy, X-ray phase analysis, electron paramagnetic resonance, isotope analysis, differential thermal analysis, electron microscopy, and others are used. The synthesis of nanocrystalline diamond particles as nuclei for growing single crystals is carried out by the shock-wave method using profiled shock waves. Findings. A complex of physicochemical methods for studying the grown diamond monocrystals has been carried out. The reasons for the discrete growth of diamond and the retention of the central inclusion (a polycrystalline diamond of shock-wave origin) in the process of growth have been established and analyzed. It is shown that the discreteness of diamond formation is characteristic only for thermodynamically metastable conditions. The results of the experiments give grounds to make an assumption about the metastable growth, including of diamonds from primary deposits. Originality. The hypothesis has been developed concerning the origin of diamond nanoparticles in interstellar carbon clouds which refer exclusively to central polycrystalline inclusions in a monocrystal diamond shell. The hypothesis eliminates the scientific contradiction that arises in all cases when attempts are made to interpret the natural discreteness of diamond formation based on the regularities of the graphite-diamond state diagram. Possible causes of discrete diamond formation in nature and the scenario of the formation of diamond nanocrystals in an interstellar cloud of atomic carbon have been considered. Practical value. The value of the experimental research results refers to the development of a non-energy-intensive technology for the growing large diamond monocrystals at temperatures of 5001400 K, and pressures of 105107 Pa.

show abstract

Section: A Ke Rs T E Rtmentioning

confidence: 99%

“…The authors of [61,84,85] suggested that relic diamond particles could be found in other bodies of the Solar Sys tem, e. g. meteorites [86]. This idea was later (1987) proved in the research [1].…”

Section: A Ke Rs T E Rtmentioning

confidence: 99%

Compound physical and mechanical effects stimulating metastable diamond formation

Соболев¹,

Kovrov²,

Nalisko³

et al. 2021

Nauk. visn. nat. hirn. univ.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The method for forming a plane detonation wave is reliable. Evidence is a number of positive experimental results obtained during the formation of plane shock waves in the material under study directly by a plane detonation wave front at an angle of 0° relative to the surface of the material facing the striker [33,34], or by a detonation wave front sliding at an angle of 90° to the generatrix of the cylinder surface [35], or by the impact of a fl at plate accelerated by the products of the PEC explosion [36], including in problems of studying the nature of the fl ow of matter behind the front of the bow shock [37].…”

mentioning

confidence: 99%

On the mechanism of ionization of atoms at compression of a substance by front of the converging shock wave

Soboliev¹,

Hapieiev²,

Skobenko³

et al. 2022

Nauk. visn. nat. hirn. univ.

View full text Add to dashboard Cite

Purpose. To study changes in the microstructure of metals after exposure to high-energy plasma jets formed by the cumulation of gas-dynamic flows in a conical target. To estimate the expected state of matter in a strong shock wave compression, taking into account the change in volumetric energy density at the moment of transformation of a solid body plasma into nuclear matter. Methodology. The technique of laser initiation of a profiled front of detonation waves in explosive charges and the corresponding profile of shock waves in materials, methods and techniques for measuring the dynamic parameters of shock-compressed substances are used. Findings. An experimental study on the physicochemical state of a substance that has been processed with extremely high pressures and temperatures during compression by converging shock waves in conical targets has been carried out. Scientific results of physical and mathematical modelling of converging shock waves are analysed. Originality. For the first time, the formation of symmetric plasma jets during gas compression in conical targets has been experimentally observed. For the first time, metallo-physical studies on the microstructure of cast iron and steel have been carried out. These studies were made after the action of high-energy dense plasma jets with a temperature of (2.52.8) × 106K and a pressure 1.12 × 1012 arising from the collision of the jet with a barrier. Iron-55 and copper-64 isotopes were found in the cast iron microstructure near the surface formed by the action of the plasma jet. The main components of the plasma jet were gaseous oxygen, nitrogen, argon, and atomic iron, copper and gold. The fact of formation of isotopes is the result of nuclear reactions. One of the main conditions for the implementation of such reactions is a dense high-temperature plasma. It is assumed that under the action of a strong shock wave in a conical target, in addition to the synthesis reaction, other nuclear reactions with heavy elements can be realized. The ideas about the expected state of matter in a compression shock wave are presented, taking into account the change in the volumetric energy density at the moment of transformation of a solid body plasma into nuclear matter. Practical value. The proposed technique for conducting experimental studies on a shock-compressed substance under the action of extreme temperatures and pressures in conical targets using laser initiation of chemical explosives is of practical importance. The idea of the expected state of matter in the shock wave is also important.

show abstract

Physical and chemical conditions for the diamond formation

Sobolev,

Gubenko,

Khomenko

et al. 2025

Diamond and Related Materials

View full text Add to dashboard Cite

Physical conditions of the ‘light’ core formation and thermonuclear heat source deep inside the earth

Cited by 3 publications

References 9 publications

Compound physical and mechanical effects stimulating metastable diamond formation

Compound physical and mechanical effects stimulating metastable diamond formation

On the mechanism of ionization of atoms at compression of a substance by front of the converging shock wave

Physical and chemical conditions for the diamond formation

Contact Info

Product

Resources

About