Blackbody Design for High Temperature (1800 to 5500 K) of Metals and Carbon in Liquid States under Fast Heating

Korobenko, V. N.; Savvatimskiy, A. I.

doi:10.1063/1.1627223

Cited by 19 publications

(18 citation statements)

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“…Then, the volume change due to melting is ∆v = v liq − v d = 0.016 cm 3 /g, and from the Clausius-Clapeyron equation we obtain the entropy jump ∆S = 1.6 J/(g · K) and the melting heat for diamond at the triple point λ ∞ = 7.2 kJ/g. For comparison, graphite has the following melting parameters (T = 4800 K and p = 1 GPa): ∆S = 2.08 J/(g · K), λ ∞ = 10 kJ/g, and the volume jump ∆v = 0.028 cm 3 /g [24].…”

Section: Melting Curves Of Nanodiamondmentioning

confidence: 99%

Phase Diagram of Nanocarbon

Даниленко¹

2005

Combust Explos Shock Waves

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In the phase diagram of carbon, the positions of the melting and thermodynamicequilibrium curves of detonation nanodiamonds or ultrafine diamonds are found as functions of diamond particle size. The position of the set of triple points located in the ranges of pressure 13.5-16.5 GPa and temperature 2210-4470 K and determining the region of the liquid state of nanocarbon is determined. In the phase diagram of nanocarbon, the diamond region is divided into three parts according to the type of nanoparticles: nanodiamond, liquid nanocarbon (nanodrops), and amorphous nanocarbon.

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Section: Melting Curves Of Nanodiamondmentioning

confidence: 99%

Phase Diagram of Nanocarbon

Даниленко¹

2005

Combust Explos Shock Waves

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“…It is of interest to consider direct measurements of graphite temperature with rapid addition of energy (during 1.5 µsec, approximately as under detonation conditions) [27]. The dependence T (E) (E is the energy added) clearly displays the beginning (at T = 4800 K) and end of melting in the range of pressures p = 0.5-1.0 (beginning) and 0.75-1.35 GPa (end); the slope of the curve dT /dE for liquid carbon is smaller than for graphite, which is explained by a greater heat capacity of the liquid.…”

Section: Formation Of Nanodiamonds In the Detonation Wavementioning

confidence: 99%

Specific Features of Synthesis of Detonation Nanodiamonds

Даниленко¹

2005

Combust Explos Shock Waves

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It is demonstrated that the Chapman-Jouguet parameters for high explosives used in nanodiamond synthesis are located in the region of liquid nanocarbon; therefore, the chemical reaction zone of the detonation wave involves formation of carbon nanodroplets, which are later crystallized into nanodiamonds on the segment of the isentrope of expansion of detonation products, passing through the region of stability of nanodiamonds in the pressure range of 16.5-10 GPa and the temperature range of 3400-2900 K. Soot in the resultant mixture is the product of amorphization of nanodroplets rather than graphitization of ultrafine diamonds. The influence of detonation conditions of high-explosive charges in an explosive chamber on nanodiamond synthesis is analyzed.

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“…In recent years, this method was used to investigate the properties of liquid zirconium up to 4100 K [3][4][5][6][7] and liquid tungsten up to 5500 K [8]. In recent years, this method was used to investigate the properties of liquid zirconium up to 4100 K [3][4][5][6][7] and liquid tungsten up to 5500 K [8].…”

Section: Samples and Experimentsmentioning

confidence: 99%

“…where U is the voltage on the sample; and L is the sample inductance determined by the initial geometry, as was done in [4,7,8].…”

Section: Blackbody Modelmentioning

confidence: 99%

“…The efficiency of the employed blackbody model of this type was previously checked [3][4][5][6][7][8] in measuring the thermophysical properties (heat capacity, enthalpy, electric resistance) of liquid zirconium from the melting point to 4100 K and by comparison with equilibrium data. The estimation of the fiber heating due to thermal conductivity of air reveals that it is insignificant.…”

Section: High-speed Pyrometermentioning

confidence: 99%

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Heat capacity of liquid hafnium from the melting point to the boiling point at atmospheric pressure

2005

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The temperature dependence of the heat capacity of highly pure hafnium (zirconium content of 0.14% by mass) in the liquid state is measured from the melting point to 5000 K. A sample in the form of a wedge made up by two thin strips of hafnium foil is heated by an electric current pulse. The temperature is measured by a high-speed pyrometer. The radiation from the space formed by foil strips is directed to the pyrometer via fiber-optical light guide. The specific heat capacity of liquid hafnium at atmospheric pressure from the melting point (2504 K) to the boiling point (4875 K) exhibits an increasing pattern similar to that of the previously investigated heat capacity of liquid zirconium.

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Blackbody Design for High Temperature (1800 to 5500 K) of Metals and Carbon in Liquid States under Fast Heating

Cited by 19 publications

References 0 publications

Phase Diagram of Nanocarbon

Phase Diagram of Nanocarbon

Specific Features of Synthesis of Detonation Nanodiamonds

Heat capacity of liquid hafnium from the melting point to the boiling point at atmospheric pressure

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