Abstract
The nanopowders of iron, nickel, molybdenum and copper received by electric explosion of wire were irradiated by an electron current on the liner electron accelerator with the radiation doses of 1, 5, 10 Mrad. Four parameters of activity of nanopowders were evaluated according to the differential thermal analysis: the initial temperature of oxidation, the completeness of oxidation, the maximum speed of metal oxidation and the thermal effect of oxidation. It was ascertained that the thermal effect of combustion increased after irradiation by 1.5-2.5 times. It was shown that the significant increase of the heat of combustion of nanopowders was caused by the increase of the internal stored energy as a result of the ionizing effect of electrons. The electrostatic model of surface charged structures of nanoparticles generated by the ionizing effect of electrons was offered, and its analogue is a spherical capacitor. This model makes it possible to estimate the increase of the surface energy of nanopowders by charging the spherical nanocapacitor with 110-1 100 kJ/mol. It was shown that the lattice parameters of the initial and irradiated metal nanopowders are greater than those of the standard samples of massive metals. Irradiation of nanopowders by accelerated electrons furthers stabilization of interplanar spacings of crystal lattices and brings them closer the standard of massive metals.
| Original language | English |
|---|---|
| Pages (from-to) | 135-141 |
| Number of pages | 7 |
| Journal | International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM |
| Volume | 1 |
| Issue number | 6 |
| Publication status | Published - 1 Jan 2014 |
| Event | 14th International Multidisciplinary Scientific Geoconference and EXPO, SGEM 2014 - Albena, Bulgaria Duration: 17 Jun 2014 → 26 Jun 2014 |
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Keywords
- Electron irradiation
- Energy condensed systems
- Nanocapacitor
- Nanopowders
- The crystal lattice
- The thermal effect
ASJC Scopus subject areas
- Geotechnical Engineering and Engineering Geology
- Geology
Cite this
Oxidation heat effects of metal nanopowders after electron irradiation. / Dilmukhambetov, Esen; Espolov, Tilektes; Ospanova, Madina; Ilyin, Alexander.
In: International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM, Vol. 1, No. 6, 01.01.2014, p. 135-141.Research output: Contribution to journal › Conference article
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TY - JOUR
T1 - Oxidation heat effects of metal nanopowders after electron irradiation
AU - Dilmukhambetov, Esen
AU - Espolov, Tilektes
AU - Ospanova, Madina
AU - Ilyin, Alexander
PY - 2014/1/1
Y1 - 2014/1/1
N2 - The nanopowders of iron, nickel, molybdenum and copper received by electric explosion of wire were irradiated by an electron current on the liner electron accelerator with the radiation doses of 1, 5, 10 Mrad. Four parameters of activity of nanopowders were evaluated according to the differential thermal analysis: the initial temperature of oxidation, the completeness of oxidation, the maximum speed of metal oxidation and the thermal effect of oxidation. It was ascertained that the thermal effect of combustion increased after irradiation by 1.5-2.5 times. It was shown that the significant increase of the heat of combustion of nanopowders was caused by the increase of the internal stored energy as a result of the ionizing effect of electrons. The electrostatic model of surface charged structures of nanoparticles generated by the ionizing effect of electrons was offered, and its analogue is a spherical capacitor. This model makes it possible to estimate the increase of the surface energy of nanopowders by charging the spherical nanocapacitor with 110-1 100 kJ/mol. It was shown that the lattice parameters of the initial and irradiated metal nanopowders are greater than those of the standard samples of massive metals. Irradiation of nanopowders by accelerated electrons furthers stabilization of interplanar spacings of crystal lattices and brings them closer the standard of massive metals.
AB - The nanopowders of iron, nickel, molybdenum and copper received by electric explosion of wire were irradiated by an electron current on the liner electron accelerator with the radiation doses of 1, 5, 10 Mrad. Four parameters of activity of nanopowders were evaluated according to the differential thermal analysis: the initial temperature of oxidation, the completeness of oxidation, the maximum speed of metal oxidation and the thermal effect of oxidation. It was ascertained that the thermal effect of combustion increased after irradiation by 1.5-2.5 times. It was shown that the significant increase of the heat of combustion of nanopowders was caused by the increase of the internal stored energy as a result of the ionizing effect of electrons. The electrostatic model of surface charged structures of nanoparticles generated by the ionizing effect of electrons was offered, and its analogue is a spherical capacitor. This model makes it possible to estimate the increase of the surface energy of nanopowders by charging the spherical nanocapacitor with 110-1 100 kJ/mol. It was shown that the lattice parameters of the initial and irradiated metal nanopowders are greater than those of the standard samples of massive metals. Irradiation of nanopowders by accelerated electrons furthers stabilization of interplanar spacings of crystal lattices and brings them closer the standard of massive metals.
KW - Electron irradiation
KW - Energy condensed systems
KW - Nanocapacitor
KW - Nanopowders
KW - The crystal lattice
KW - The thermal effect
UR - http://www.scopus.com/inward/record.url?scp=84946544963&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84946544963&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:84946544963
VL - 1
SP - 135
EP - 141
JO - International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM
JF - International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM
SN - 1314-2704
IS - 6
ER -