Effect of OH species in the oxynitride titanium formation during plasma-assisted thermochemical treatment

2021 ◽  
pp. 127990
Author(s):  
J. de O. Vitoriano ◽  
R.S. Pessoa ◽  
A. de A. Mendes Filho ◽  
J. Amorim Filho ◽  
C. Alves-Junior
Keyword(s):  
Thermochemical Treatment

Solidification simulation and casting of an impeller designed for a thermochemical treatment furnace

2020 ◽  
Author(s):  
M. R. Condruz ◽  
O. Dumitrescu ◽  
T. Frigioescu ◽  
R. Cârlănescu ◽  
C. Dumitru ◽  
...  
Keyword(s):  
Thermochemical Treatment ◽  
Solidification Simulation ◽  
Treatment Furnace

Kinetic Study of the Growth of Hard Layers on a Low Carbon Steel

MRS Advances ◽  
2017 ◽  
Vol 2 (50) ◽  
pp. 2809-2817
Author(s):  
Daniel S. Huerta ◽  
E.D. García Bustos ◽  
D.V. Melo Máximo ◽  
M. Flores Martinez
Keyword(s):  
Carbon Steel ◽  
Treatment Time ◽  
Low Carbon Steel ◽  
Thermochemical Treatment ◽  
Low Carbon ◽  
X Ray Diffraction ◽  
Kinetic Growth ◽  
Steel Aisi ◽  
Growth Constants ◽  
Substrate Hardness

ABSTRACTIn the present work the kinetic growth is analyzed for a hard coating applied on a low carbon steel AISI 8620. A thermochemical treatment of bored with dehydrated paste at temperatures of 900, 950 and 1000 °C with a residence time of 2, 4, 6 and 8 h. The morphology and types of borides formed on the surface of the steel were evaluated by optical microscopy, scanning electron microscopy (SEM) and X-ray diffraction (XRD). The layer formed has a size of 20 to 113 μm which will be dependent on the process temperature, the treatment time and the alloy elements of the substrate. Hardness of 1493-1852 HV are presented for treatment times and temperatures established in this study. The kinetics of growth were determined and analyzed using a mathematical model of diffusion, evaluating the penetration of the biphasic layer that is determined as a function of the time and temperature of the thermochemical treatment (TCT). The results show the increase in the growth constants (k) with respect to the bored temperatures. The activity energy (Q) of the material AISI 8620 was also obtained.

scholarly journals Experimental study of the thermochemical treatment of the low-grade coal prior to boiler combustion at coal-fired power station

2019 ◽  
Vol 109 ◽  
pp. 00119
Author(s):  
Volodymyr Yemelianenko ◽  
Vitalii Pertsevyi ◽  
Oleksandr Zhevzhyk ◽  
Iryna Potapchuk ◽  
Oleksandr Lutai
Keyword(s):  
Experimental Study ◽  
Power Plants ◽  
Thermal Power ◽  
Thermochemical Treatment ◽  
Gas Pressure ◽  
Pulverized Coal ◽  
Time Range ◽  
Low Grade ◽  
Boiler Furnace ◽  
Coal Fuel

Analysis of the perspectives of the coal fuel for thermal power plants is carried out. The necessity of the experimental study for temperature measurement in the boiler furnace. The results of the experimental study are presented: temperature change over time at the burner outlet for different constant pressure value of the backlighting gas, dependence of the temperature at the burner outlet from the backlighting gas pressure for constant concentration value of pulverized coal in coal-air mixture, dependence of the temperature at the burner outlet from the concentration of pulverized coal in coal-air mixture for constant value of the backlighting gas pressure, temperature measurements for constant backlighting gas pressure value, constant value of the concentration of pulverized coal in coal-air mixture when plasmatron is switched and operates for some time range. The results of the study could be applied to the solid fuel treatment for different thermal units.

Thermochemical treatment of titanium alloys in powder media

2007 ◽  
Vol 49 (5-6) ◽  
pp. 265-271
Author(s):  
I. N. Burnyshev ◽  
O. M. Valiakhmetova ◽  
S. A. Mutagarova
Keyword(s):  
Titanium Alloys ◽  
Thermochemical Treatment

Structural and magnetic properties of nitrided finemet-type ribbons

2000 ◽  
Vol 77 (9) ◽  
pp. 731-736
Author(s):  
H Atmani ◽  
S Grognet ◽  
J Teillet ◽  
K Zellama ◽  
R Zuberek
Keyword(s):  
Magnetic Properties ◽  
Curie Temperature ◽  
Crystalline Phase ◽  
Room Temperature ◽  
Structural Parameters ◽  
Thermochemical Treatment ◽  
Specific Magnetization ◽  
Nano Structure ◽  
Magnetostriction Constant ◽  
Structural And Magnetic Properties

Nitriding thermochemical treatment under suitable parameters is used to nano-crystallize Fe73.5Cu1Nb3Si13.5B9 ribbon. This new kind of treatment leads to finer nano-structure and modifies the structural parameters of the α-Fe(Si) phase, obtained during the treatment. The magnetic properties are also improved; specific magnetization at room temperature and Curie temperature of the crystalline phase increase, and the magnetostriction constant becomes smaller. The nitrogenation seems to offer a new way to obtain nanostructured ribbons. PACS No.: 75.70

Effect of thermochemical treatment on the state of SWNT and on the electrical conductivity of epoxy-SWNT composites

2020 ◽  
pp. 1-7
Author(s):  
Ranis Ramisovich Garipov ◽  
Sergey Mansurovich Khantimerov ◽  
Sergei Glebovich L'vov ◽  
Vladimir Alekseevich Shustov ◽  
Nadezhda Vasilievna Kurbatova ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Thermochemical Treatment ◽  
The State

Thermochemical Treatment

2017 ◽  
pp. 140-188
Author(s):  
Filomena Pinto ◽  
Paula Costa ◽  
Miguel Miranda
Keyword(s):  
Thermochemical Treatment
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