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Umanskyi O. P. Storozhenko M. S. Koshelev M. V. Antonov M. M. Vasylkivska M. A. Tymofeeva I. I. 《Powder Metallurgy and Metal Ceramics》2019,57(11-12):670-678
Powder Metallurgy and Metal Ceramics - The effect of TiB2 and CrB2 additives on the oxidation behavior of composites made of the NiCrBSiC and FeNiCrBSiC self-fluxing alloys has been studied in air... 相似文献
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V. I. Latyuk V. I. Kelarev V. N. Koshelev K. D. Korenev 《Chemistry and Technology of Fuels and Oils》2002,38(5):312-315
The protective properties of I—40 industrial and M—11 motor oils containing N—substituted 2,4—diamino—6—alkylthio— and 2—amino—4,6—dialkylthio—sym—triazones as corrosion inhibitors are investigated. It is shown that some of these compounds are more effective than the industrial corrosion inhibitor Penazolin 10—16 — a mixture of 1,2—disubstituted imidazolines obtained by condensation of C10—C16 synthetic fatty acids ( SFA) with polyethylenepolyamines. 相似文献
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A. T. Koshelev 《Metal Science and Heat Treatment》1990,32(12):918-921
| 1. | Connecting the specimen to the cathode and a copper rod to the anode of a dc source with current density i=0.35 A/cm2 on the outer surface of the specimen brings about an approximate halving of the time of liquid carbonitriding. |
| 2. | When the specimen is connected to the anode, and the copper rod to the cathode of the dc source with i=0.35 A/cm2, saturation does not occur. |
| 3. | Increased dissociation of salt at increased current density (to 0.8 A/cm2) leads to reduced content of diffusing elements in the saturated layer and to reduced hardness of the specimens. |
| 4. | Saturation occurs on account of positively charged carbon and nitrogen ions. |
| 5. | In thermochemical treatment using dc the repulsive energy between the metal atoms of the specimen increases. The smaller the difference between the attractive and repulsive energies of the atoms is, the higher is the rate of direct diffusion, and the higher is the degree of polarization of the surface atoms by the electrons of the electron cloud. |
| 6. | If the attractive energy of the metal atoms is greater than the repulsive energy, direct diffusion occurs; if the opposite applies, then reverse diffusion occurs. |
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Reliable Computing - 相似文献
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V. D. Sevast’yanov A. S. Koshelev G. N. Maslov 《Instruments and Experimental Techniques》2005,48(4):433-443
The results from studies of the deformation of the instantaneous neutron spectra resulting from the fission of 235U nuclei in the material of structural elements of a fast reactor core are presented. The neutron spectra at and near the center of the reactor core were measured using neutron activation and fission neutron detectors.__________Translated from Pribory i Tekhnika Eksperimenta, No. 4, 2005, pp. 15–25.Original Russian Text Copyright © 2005 by Sevast’yanov, Koshelev, Maslov. 相似文献
