Thermodynamic Estimation of the Parameters for the C–H–O–N–Me-Systems as Operating Fluid Simulants for New Processes of Powder Thermal Spraying and Spheroidizing
Over the past few years, a group of new processes was developed for high-temperature, including plasma electric arc spraying (at ambient pressure) and spheroidizing of some ceramic and metal powder materials with the use of gaseous hydrocarbons in the heat carriers as well as with feeding of organic...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | Russian |
| Published: |
Belarusian National Technical University
2021-10-01
|
| Series: | Наука и техника |
| Subjects: | |
| Online Access: | https://sat.bntu.by/jour/article/view/2479 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849220928120029184 |
|---|---|
| author | A. V. Gorbunov O. G. Devoino V. A. Gorbunova O. K. Yatskevitch V. A. Koval |
| author_facet | A. V. Gorbunov O. G. Devoino V. A. Gorbunova O. K. Yatskevitch V. A. Koval |
| author_sort | A. V. Gorbunov |
| collection | DOAJ |
| description | Over the past few years, a group of new processes was developed for high-temperature, including plasma electric arc spraying (at ambient pressure) and spheroidizing of some ceramic and metal powder materials with the use of gaseous hydrocarbons in the heat carriers as well as with feeding of organic additions into a high-temperature jet, in particular, polymeric ones, to control porosity of sprayed metallic functional coatings. The paper considers the possibility to modify such technological processes by introducing solid fuel additions of a polymer type into the operating fluid of an apparatus for gasthermal (plasma or other) treatment, which provides melting of metal or oxide powders. For this, with the help of thermodynamic analysis, the processes have been evaluated at temperatures (300–3000) K for the set of such reacting five component systems as C–H–O–N–Me (at ambient pressure 0.101 MPa) with five variants of Ме – aluminum, titanium, chrome, copper, nickel. This makes it possible to consider these systems as simulants for potential technologies for the treatment of oxide powders (Al2O3, TiO2, Cr2O3) as well as metallic ones (Cu, Ni and their alloys). In order to obtain high exothermic contribution to the heating of powders, the combination “air + polymeric addition (polyethylene) of LDPE grade” was chosen as mixed heat carrier (operating fluid) for the basic version of simulated process. During the analysis of equilibria for the considered multicomponent systems (17 variants), a set of following parameters has been used to characterize the energy intensity of the target powder heating process: the equivalence ratio for reacting mixture and its adiabatic temperature; the energy efficiency of material heating with and without taking into account the effect of fuel addition; specific energy consumption for the powder melting; autothermicity degree of the process during the combined heating (electrothermal heating by the arc of plasma torch and heat flux from the “air + solid fuel additions” mixture) of refractory powders. As a result of the assessment, the preferred (from thermodynamic standpoint) regimes of the considered processes have been found and the possibility to realize an energy-efficient heating of these oxide and metal materials (without oxidation of the latter to CuOx, NiO) with a reduced part of the electric channel of energy transfer, resulted from the carrying out of appreciable effect of the fuel-initiated mechanism of heating in the analyzed C–H–O–N–Mesystems, has been shown in the paper. |
| format | Article |
| id | doaj-art-dac5e56dad6c4289b4afa772aab160b2 |
| institution | Kabale University |
| issn | 2227-1031 2414-0392 |
| language | Russian |
| publishDate | 2021-10-01 |
| publisher | Belarusian National Technical University |
| record_format | Article |
| series | Наука и техника |
| spelling | doaj-art-dac5e56dad6c4289b4afa772aab160b22024-12-02T03:56:43ZrusBelarusian National Technical UniversityНаука и техника2227-10312414-03922021-10-0120539039810.21122/2227-1031-2021-20-5-390-3982145Thermodynamic Estimation of the Parameters for the C–H–O–N–Me-Systems as Operating Fluid Simulants for New Processes of Powder Thermal Spraying and SpheroidizingA. V. Gorbunov0O. G. Devoino1V. A. Gorbunova2O. K. Yatskevitch3V. A. Koval4Aeronautics Institute of TechnologyBelarusian National Technical UniversityBelarusian National Technical UniversityBelarusian National Technical UniversityBelarusian National Technical UniversityOver the past few years, a group of new processes was developed for high-temperature, including plasma electric arc spraying (at ambient pressure) and spheroidizing of some ceramic and metal powder materials with the use of gaseous hydrocarbons in the heat carriers as well as with feeding of organic additions into a high-temperature jet, in particular, polymeric ones, to control porosity of sprayed metallic functional coatings. The paper considers the possibility to modify such technological processes by introducing solid fuel additions of a polymer type into the operating fluid of an apparatus for gasthermal (plasma or other) treatment, which provides melting of metal or oxide powders. For this, with the help of thermodynamic analysis, the processes have been evaluated at temperatures (300–3000) K for the set of such reacting five component systems as C–H–O–N–Me (at ambient pressure 0.101 MPa) with five variants of Ме – aluminum, titanium, chrome, copper, nickel. This makes it possible to consider these systems as simulants for potential technologies for the treatment of oxide powders (Al2O3, TiO2, Cr2O3) as well as metallic ones (Cu, Ni and their alloys). In order to obtain high exothermic contribution to the heating of powders, the combination “air + polymeric addition (polyethylene) of LDPE grade” was chosen as mixed heat carrier (operating fluid) for the basic version of simulated process. During the analysis of equilibria for the considered multicomponent systems (17 variants), a set of following parameters has been used to characterize the energy intensity of the target powder heating process: the equivalence ratio for reacting mixture and its adiabatic temperature; the energy efficiency of material heating with and without taking into account the effect of fuel addition; specific energy consumption for the powder melting; autothermicity degree of the process during the combined heating (electrothermal heating by the arc of plasma torch and heat flux from the “air + solid fuel additions” mixture) of refractory powders. As a result of the assessment, the preferred (from thermodynamic standpoint) regimes of the considered processes have been found and the possibility to realize an energy-efficient heating of these oxide and metal materials (without oxidation of the latter to CuOx, NiO) with a reduced part of the electric channel of energy transfer, resulted from the carrying out of appreciable effect of the fuel-initiated mechanism of heating in the analyzed C–H–O–N–Mesystems, has been shown in the paper.https://sat.bntu.by/jour/article/view/2479multicomponent c–h–o–n–me-systemsthermal sprayingspheroidizingceramic and metal powder materialsaluminum and chromium oxidestitanium dioxidecoppernickelfuel additionspolymerspolyethylenethermodynamic equilibriaadiabatic temperatureenergy efficiencyenergy consumptionsautothermicity degree of heating |
| spellingShingle | A. V. Gorbunov O. G. Devoino V. A. Gorbunova O. K. Yatskevitch V. A. Koval Thermodynamic Estimation of the Parameters for the C–H–O–N–Me-Systems as Operating Fluid Simulants for New Processes of Powder Thermal Spraying and Spheroidizing Наука и техника multicomponent c–h–o–n–me-systems thermal spraying spheroidizing ceramic and metal powder materials aluminum and chromium oxides titanium dioxide copper nickel fuel additions polymers polyethylene thermodynamic equilibria adiabatic temperature energy efficiency energy consumptions autothermicity degree of heating |
| title | Thermodynamic Estimation of the Parameters for the C–H–O–N–Me-Systems as Operating Fluid Simulants for New Processes of Powder Thermal Spraying and Spheroidizing |
| title_full | Thermodynamic Estimation of the Parameters for the C–H–O–N–Me-Systems as Operating Fluid Simulants for New Processes of Powder Thermal Spraying and Spheroidizing |
| title_fullStr | Thermodynamic Estimation of the Parameters for the C–H–O–N–Me-Systems as Operating Fluid Simulants for New Processes of Powder Thermal Spraying and Spheroidizing |
| title_full_unstemmed | Thermodynamic Estimation of the Parameters for the C–H–O–N–Me-Systems as Operating Fluid Simulants for New Processes of Powder Thermal Spraying and Spheroidizing |
| title_short | Thermodynamic Estimation of the Parameters for the C–H–O–N–Me-Systems as Operating Fluid Simulants for New Processes of Powder Thermal Spraying and Spheroidizing |
| title_sort | thermodynamic estimation of the parameters for the c h o n me systems as operating fluid simulants for new processes of powder thermal spraying and spheroidizing |
| topic | multicomponent c–h–o–n–me-systems thermal spraying spheroidizing ceramic and metal powder materials aluminum and chromium oxides titanium dioxide copper nickel fuel additions polymers polyethylene thermodynamic equilibria adiabatic temperature energy efficiency energy consumptions autothermicity degree of heating |
| url | https://sat.bntu.by/jour/article/view/2479 |
| work_keys_str_mv | AT avgorbunov thermodynamicestimationoftheparametersforthechonmesystemsasoperatingfluidsimulantsfornewprocessesofpowderthermalsprayingandspheroidizing AT ogdevoino thermodynamicestimationoftheparametersforthechonmesystemsasoperatingfluidsimulantsfornewprocessesofpowderthermalsprayingandspheroidizing AT vagorbunova thermodynamicestimationoftheparametersforthechonmesystemsasoperatingfluidsimulantsfornewprocessesofpowderthermalsprayingandspheroidizing AT okyatskevitch thermodynamicestimationoftheparametersforthechonmesystemsasoperatingfluidsimulantsfornewprocessesofpowderthermalsprayingandspheroidizing AT vakoval thermodynamicestimationoftheparametersforthechonmesystemsasoperatingfluidsimulantsfornewprocessesofpowderthermalsprayingandspheroidizing |