Thermodynamic Analysis of the Oxidation of Radioactive Graphite in the Na2CO3–K2CO3–Sb2O3 Melt in an Argon Atmosphere

Brazing diamond grits to steel substrate using Ni-based filler alloy was carried out via laser in an argon atmosphere. Thermodynamic analysis was performed in order to research the interfacial reaction mechanism of diamond and Ni-Cr alloy during high temperature brazing. Meanwhile, microstructure of the interfacial layer was experimentally detected by scanning electron microscope (SEM), energy dispersion spectrometer (EDS) and X-ray diffraction (XRD) in this paper. The results indicate that according to the thermodynamic theory the interfacial reaction has been proved feasible, and during brazing high strength bonding between diamond grits and the steel substrate has been successfully realized because the chromium in the Ni-based alloy segregated preferentially to the surface of the diamond to form a chromium-rich reaction product Cr3C2, and the bond between the alloy and the Diamond was established through the reaction product.

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Thermodynamic Analysis of the Oxidation of Radioactive Graphite in the CuO–NaCl–KCl–Na2CO3–K2CO3 Melt in Water Vapor

Russian Metallurgy (Metally) ◽

10.1134/s0036029520020020 ◽

2020 ◽

Vol 2020 (2) ◽

pp. 155-163 ◽

Cited By ~ 1

Author(s):

N. M. Barbin ◽

A. M. Kobelev ◽

D. I. Terent’ev ◽

S. G. Alekseev

Keyword(s):

Water Vapor ◽

Thermodynamic Analysis ◽

Radioactive Graphite

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Thermodynamic modeling of the heating of radioactive graphite in an argon atmosphere

Теплофизика высоких температур ◽

10.31857/s004036440002718-3 ◽

2018 ◽

Vol 56 (5) ◽

pp. 751-763

Author(s):

N. Barbin ◽

◽

T. Kolbin ◽

D. Terentyev ◽

S. Alekseev ◽

...

Keyword(s):

Thermodynamic Modeling ◽

Argon Atmosphere ◽

Radioactive Graphite

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Thermodynamic Analysis of the Oxidation of Radioactive Graphite in Molten Na2CO3–K2CO3–Sb2O3 in a Carbon Dioxide Atmosphere

Russian Metallurgy (Metally) ◽

10.1134/s0036029519080032 ◽

2019 ◽

Vol 2019 (8) ◽

pp. 743-749

Author(s):

N. M. Barbin ◽

I. A. Sidash ◽

D. I. Terent’ev ◽

S. G. Alexeev

Keyword(s):

Carbon Dioxide ◽

Thermodynamic Analysis ◽

Radioactive Graphite ◽

Carbon Dioxide Atmosphere

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Thermodynamic analysis of radionuclides behaviour in products of vapour phase hydrothermal oxidation of radioactive graphite

Journal of Radioanalytical and Nuclear Chemistry ◽

10.1007/s10967-015-4587-2 ◽

2015 ◽

Vol 307 (2) ◽

pp. 1459-1470 ◽

Cited By ~ 2

Author(s):

N. M. Barbin ◽

D. I. Terentiev ◽

S. G. Alexeev ◽

T. M. Barbina

Keyword(s):

Thermodynamic Analysis ◽

Vapour Phase ◽

Radioactive Graphite ◽

Hydrothermal Oxidation

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The effect of small additions of Cu on precipitation in Al-Mg-Si alloys

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100135812 ◽

1990 ◽

Vol 48 (2) ◽

pp. 442-443

Author(s):

M. Tamizifar ◽

G. Cliff ◽

R.W. Devenish ◽

G.W. Lorimer

Keyword(s):

Electron Microscopy ◽

Analytical Electron Microscopy ◽

Scanning Transmission Electron Microscope ◽

Argon Atmosphere ◽

Age Hardening ◽

X Ray ◽

Transmission Electron ◽

Heat Treated ◽

Analytical Electron ◽

Scanning Transmission

Small additions of copper, <1 wt%, have a pronounced effect on the ageing response of Al-Mg-Si alloys. The object of the present investigation was to study the effect of additions of copper up to 0.5 wt% on the ageing response of a series of Al-Mg-Si alloys and to use high resolution analytical electron microscopy to determine the composition of the age hardening precipitates.The composition of the alloys investigated is given in Table 1. The alloys were heat treated in an argon atmosphere for 30m, water quenched and immediately aged either at 180°C for 15 h or given a duplex treatment of 180°C for 15 h followed by 350°C for 2 h2. The double-ageing treatment was similar to that carried out by Dumolt et al. Analyses of the precipitation were carried out with a HB 501 Scanning Transmission Electron Microscope. X-ray peak integrals were converted into weight fractions using the ratio technique of Cliff and Lorimer.

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