Begell House Inc.
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
HTM
1093-3611
21
3
2017
MATHEMATICAL MODELING OF ELECTRON AND ION TEMPERATURE EVOLUTION UNDER THE ACTION OF PULSED HIGH-INTENSITY ELECTRON BEAM
185-190
10.1615/HighTempMatProc.2017024807
Nurken E.
Aktaev
University of Tyumen, 6 Volodarskii Str., Tyumen, 625003, Russia
G. E.
Remnev
Tomsk Polytechnic University, 2 Lenina Ave., Tomsk 634028, Russia
A. Ya.
Pak
Tomsk Polytechnic University, 30 Lenin Ave., Tomsk, 634050, Russia
A. P.
Yalovets
National Research South Ural State University, 76 Lenin Ave., Chelyabinsk,
454080, Russia
plasma
electron beam
electron and ion temperatures
hydrodynamic model
A two-liquid two-temperature hydrodynamic model has been developed for describing plasma processes under the action of a high-intensity electron beam. The characteristic parameters of the electron beam are: time duration 100 ns, current 5 kA, and energy 300 keV. The process of energy redistribution between electron and ion components is investigated.
THIN BIOACTIVE Zn-SUBSTITUTED HYDROXYAPATITE COATING DEPOSITED ON Ti SUBSTRATE BY RADIOFREQUENCY SPUTTERING
191-201
10.1615/HighTempMatProc.2017024817
Konstantin A.
Prosolov
National Research Tomsk Polytechnic University, 30 Lenin Ave., Tomsk, 634050, Russia; Institute of Strength Physics and Materials Science, Siberian Branch of the Russian Academy of Sciences, 2/4 Akademicheskii Ave., Tomsk, 634055, Russia
O. A.
Belyavskaya
National Research Tomsk Polytechnic University, 30 Lenin Ave., Tomsk,
634050, Russia
J. V.
Rau
Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche
(ISM-CNR), 100 Via del Fosso del Cavaliere, 00133 Roma, Italy
Yu. P.
Sharkeev
Institute of Strength Physics and Materials Science, Siberian Branch of the Russian Academy of Sciences, 2/4 Akademicheskii Ave., Tomsk, 634055, Russia; National Research Tomsk Polytechnic University, 30 Lenin Ave., Tomsk,
634050, Russia
antibacterial activity
osteointegration
thin coatings
plasma coatings
biocompatibility
In this study, Zn-substituted hydroxyapatite synthesized by mechanochemical activation was deposited on titanium substrates by a radiofrequency sputtering method. The microstructure, composition, and sputtering rate of the deposited films were examined. The coatings are formed
by an amorphous and quasi-amorphous type of structure with good adhesion to the substrate. The elemental composition of the coatings is close to a stoichiometric hydroxyapatite one with a trace of Zn. It was discovered that it is possible to deposit a thin amorphous coating from a crystalline target by increasing the target-to-substrate distance and subsequently decreasing the substrate temperature. This provides a possibility of forming an antibacterial bioactive coating with a high level of bioresorbability which could be used for a rapid antibacterial effect. Also, amorphous calcium phosphate could be used as a component of a multilayer coating comprised of substituted hydroxyapatite in both amorphous and crystalline forms for improved
implant stability.
HIGH-POWER PULSE PROCESSING OF THERMAL COATINGS BASED ON A SELF-FLUXING ALLOY AND MODIFIED BY SOLID HIGH-MELTING COMPOUNDS: RESEARCH AND MODELING
203-223
10.1615/HighTempMatProc.2017024942
A. Ph.
Ilyuschenko
O.V. Roman Powder Metallurgy Institute, National Academy of Sciences of
Belarus, 41 Platonov Str., Minsk, 220005, Belarus
A. I.
Shevtsov
O.V. Roman Powder Metallurgy Institute, National Academy of Sciences of
Belarus, 41 Platonov Str., Minsk, 220005, Belarus
Valiantsin M.
Astashynski
A.V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences
of Belarus, 15 P. Brovka Str., Minsk, 220072, Belarus; National Research Nuclear University "MEPhI" (Moscow Engineering Physics Institute), 31 Kashirskoe Highway, Moscow, 115409, Russia
Anton M.
Kuzmitski
A. V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, 15, P. Brovki Str, Minsk 220072, Belarus
A. N.
Chumakov
B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 68 Nezavisimost Ave., Minsk, 220072, Belarus
Nikolay A.
Bosak
B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 68 Nezavisimost Ave., Minsk, 220072, Belarus
G. F.
Gromyko
Institute of Mathematics, National Academy of Sciences of Belarus,
11 Surganov Str., Minsk, 220072, Belarus
A. I.
Letsko
O.V. Roman Powder Metallurgy Institute, National Academy of Sciences of
Belarus, 41 Platonov Str., Minsk, 220005, Belarus
Kiastas V.
Buikus
Belarusian National Technical University, 65 Nezavisimost Ave., Minsk, 220013, Belarus
T. A.
Leonova
O.V. Roman Powder Metallurgy Institute, National Academy of Sciences of
Belarus, 41 Platonov Str., Minsk, 220005, Belarus
wear-resistant powder coatings
self-propagating high-temperature synthesis
compression plasma stream
laser radiation
Research and modeling of the processes involving optimization of the technological parameters of the pulse-processing of a compression plasma jet and laser radiation of thermal coatings based on the NiCrBSi alloy with solid high-melting inclusions of TiC are carried out. The properties of the coatings obtained at optimized technological parameters are studied.
ZERO-DIMENSIONAL MODEL DESCRIPTION OF THE EFFECT OF NOX REMOVAL IN N2/O2/H2O/CO2 MIXTURES IN A NONUNIFORM FIELD
225-237
10.1615/HighTempMatProc.2018025371
M.
Bouzar
LPT, Faculté des Sciences, Université A. Belkaid, 13000 Tlemcen, Algeria
A. Karim
Ferouani
LPT, Faculté des Sciences, Université A. Belkaid, 13000 Tlemcen, Algeria; Ecole Supérieure en Sciences Appliquées, ESSA-Tlemcen, Algeria
M.
Lemerini
LPT, Faculté des Sciences, Université A. Belkaid, 13000 Tlemcen, Algeria
A. K.
Hocini
Ecole Supérieure en Sciences Appliquées, ESSA-Tlemcen, Algeria
chemical kinetic
NOX removal
rate reaction
reduced electric field
The aim of this work is to analyze the time behavior of different species and their reaction rates using a zero-dimensional model based on chemical kinetic equations. The considered model is able to describe the behavior of twenty different chemical species participating in one hundred selected chemical reactions. In general, certain radicals N, O, and O3 participate in the NOX removal. In this work, we complete these studies by analyzing other species such as negative ions (i.e., O2−, O3−, and O4−) and radicals O3 and OH present in a N2/O2/H2O/CO2 mixture. In particular, we have analyzed at various times in the ranges 10−9−10−3 s of the rate coefficient and depopulation rate of certain reactions, under different fields. The obtained results show the significant reduction in the concentration of NO, NO2, and NO3.
PHYSICOCHEMICAL CONDITIONS OF COMPLEX DIFFUSION SATURATION OF METAL SURFACES WITH TITANIUM AND CHROMIUM
239-250
10.1615/HighTempMatProc.2018025236
A. I.
Dehula
Sumy State University, 2 Rimskii-Korsakov Str., Sumy, 40007, Ukraine
N. A.
Kharchenko
Sumy State University, 2 Rimskii-Korsakov Str., Sumy, 40007, Ukraine
T. P.
Hovorun
Sumy State University, 2 Rimskii-Korsakov Str., Sumy, 40007, Ukraine
V. G.
Khizhniak
National Technical University of Ukraine, Igor Sikorsky Kyiv Polytechnic
Institute, 37 Peremogy Ave., Kyiv, 03056, Ukraine
T. V.
Loskutova
National Technical University of Ukraine, Igor Sikorsky Kyiv Polytechnic
Institute, 37 Peremogy Ave., Kyiv, 03056, Ukraine
I. Ya.
Smokovich
Otto-von-Guericke University Magdeburg, 2 Universitätsplatz, 39106,
Magdeburg, Germany
Yaroslav O.
Kravchenko
Sumy State University, 2 Rimsky Korsakov Str., Sumy, 40007, Ukraine
coatings
diffusion saturation
condensed phase
gas phase
carbide
solid solution alloys
steels
Theoretical calculations of physical and chemical conditions have been carried out for the process of diffusion saturation of steels and solid solution alloys with titanium and chromium in the presence of carbon. An equilibrium composition of the reaction medium in the temperature range 600–1500 K has been determined. The optimum temperature interval of the saturation process has been established.
FERROMAGNETIC ALLOY– FERROELECTRIC CERAMIC NANOCOMPOSITES FOR NANOELECTRONICS: THE INFLUENCE OF HEAT TREATMENT ON ELECTRICAL PROPERTIES
251-259
10.1615/HighTempMatProc.2018025554
Oleksandr
Boiko
Department of Electrical Devices and High Voltage Technology, Lublin University of Technology, Lublin, Poland
metal—dielectric composite
RLC resonances
noncoil inductance
nanocapacitors
This paper presents the results of thermal treatment of (FeCoZr)x(PbZrTiO3)(100-x) nanocomposite sample with x = 55.9 at.% at temperatures of 573 K and 748 K. The AC electrical properties at frequencies of 50–106 Hz and ambient temperatures of 94–368 K have been investigated. Current and voltage resonant and noncoil inductance phenomena can be observed in the material. The annealing
of the nanocomposite intensifies the frequency and temperature dependences of the loss factor tan δ, phase-shift angle φ, and the capacity C. Annealing the sample at a higher temperature of 748 K causes a change in the type of materials conduction from capacitive to inductive. The mechanism of charge carriers in the nanolayer is defined as hopping conductivity. The potential application of the (FeCoZr)x(PbZrTiO3)(100-x) nanocomposites in industry has been considered.
MICROSTRUCTURE AND TRIBOLOGICAL PROPERTIES OF NITRIDE COATINGS BASED ON Zr, Ti, Cr, Nb, AND Si ELEMENTS
261-275
10.1615/HighTempMatProc.2018025607
Alexander D.
Pogrebnjak
Sumy State University, 2 Rymskogo-Korsakova Street, 40007 Sumy, Ukraine; D. Serikbayev East Kazakhstan State Technical University, 69 Protozanova Street, 070004 Ust-Kamenogorsk, Republic of Kazakhstan; Al-Farabi Kazakh National University, 71 Al-Farabi Avenue, 050040 Almaty, Republic of Kazakhstan
A. A.
Bagdasaryan
Sumy State University, 2 Rymsky Korsakov Str., Sumy, 40007, Ukraine
Vyacheslav M.
Beresnev
V.N. Karazin Kharkiv National University, 4 Svoboda Sq., Kharkiv, 61022,
Ukraine
A. I.
Kupchishin
Abai Kazakh National Pedagogical University, 13 Dostyk Ave., Almaty,
050010, Republic of Kazakhstan
S. V.
Plotnikov
D. Serkbayev East Kazakhstan State Technical University, 69 A.K. Protozanov
Str., Ust-Kamenogorsk, 070000, Republic of Kazakhstan
Yaroslav O.
Kravchenko
Sumy State University, 2 Rimsky Korsakov Str., Sumy, 40007, Ukraine
vacuum arc
tribological properties
multielement coatings
microstructure
adhesion
The structure and tribological properties of the nitride coatings (Zr–Ti–Nb)N, (Zr–Ti–Cr–Nb)N, and (Zr–Ti-Cr–Nb–Si)N, fabricated by vacuum arc deposition have been investigated. Their elemental composition and crystal structure are characterized by EDS and SEM analyses, XPS, and X-ray diffraction. The multicomponent (Zr–Ti–Cr–Nb–Si)N and (Zr–Ti–Nb)N coatings are found to be a simple face-centered cubic (fcc) solid solution. For the coatings without Si, the structure is mainly composed of the TiN fcc phase and Cr2N trigonal modification. The (Zr–Ti–Nb)N and (Zr–Ti–Cr–Nb)N coatings provided the best adhesive strength in different conditions. The (Zr–Ti–Cr–Nb–Si)N coatings exhibited the worst adhesive strength, which may be attributed to the relative low hardness
PREPARATION AND CHARACTERIZATION OF A TUNGSTEN COATING LAYER ON CuCrZr ALLOY FOR THE PLASMA FACING COMPONENTS OF THE EAST
277-288
10.1615/HighTempMatProc.2018024825
Muhammad
Imran
Key Laboratory of Materials Modification by Laser, Ion and Electron Beams,
Chinese Ministry of Education, School of Physics, Dalian University
of Technology, Dalian, 116024, People's Republic of China
Jielin
Shi
Key Laboratory of Materials Modification by Laser, Ion and Electron Beams,
Chinese Ministry of Education, School of Physics, Dalian University
of Technology, Dalian, 116024, People's Republic of China
Dongye
Zhao
Key Laboratory of Materials Modification by Laser, Ion and Electron Beams,
Chinese Ministry of Education, School of Physics, Dalian University
of Technology, Dalian, 116024, People's Republic of China
Qi
Wang
Key Laboratory of Materials Modification by Laser, Ion and Electron Beams,
Chinese Ministry of Education, School of Physics, Dalian University
of Technology, Dalian, 116024, People's Republic of China
Yong
Wang
Key Laboratory of Materials Modification by Laser, Ion and Electron Beams,
Chinese Ministry of Education, School of Physics, Dalian University
of Technology, Dalian, 116024, People's Republic of China
Cong
Li
Key Laboratory of Materials Modification by Laser, Ion and Electron Beams,
Chinese Ministry of Education, School of Physics, Dalian University
of Technology, Dalian, 116024, People's Republic of China
Ran
Hai
Key Laboratory of Materials Modification by Laser, Ion and Electron Beams,
Chinese Ministry of Education, School of Physics, Dalian University
of Technology, Dalian, 116024, People's Republic of China
Harse
Sattar
Key Laboratory of Materials Modification by Laser, Ion and Electron Beams,
Chinese Ministry of Education, School of Physics, Dalian University
of Technology, Dalian, 116024, People's Republic of China
Zhongxin
Mu
Key Laboratory of Materials Modification by Laser, Ion and Electron Beams,
Chinese Ministry of Education, School of Physics, Dalian University
of Technology, Dalian, 116024, People's Republic of China
Wan-Jing
Wang
Institute of Plasma Physics, Chinese Academy of Science, Hefei, 230031,
People's Republic of China
Guang-Nan
Luo
Institute of Plasma Physics, Chinese Academy of Science, Hefei, 230031,
People's Republic of China
Gennadii E.
Remnev
National Research Tomsk Polytechnic University, 2a Lenin Ave., Tomsk, 634050, Russia
Hongbin
Ding
Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Chinese Ministry of Education, School of Physics, Dalian University of Technology, Dalian, 116024, People's Republic of China
plasma facing component
arc deposition
heat flux test
W coating
SEM
EDX
In fusion devices, Plasma Facing Components (PFCs) suffer from damage from high thermal loads and bombardment of the plasma facing component, especially in the region near the divertor. For EAST, most of the surface in the upper divertor was covered with tungsten (W) Monoblock PFCs,
by which high heat fluxes could be sustained, while PFCs of W plate fixed on a CuCrZr block have been used in some parts such as the divertor dome and baffles for lower heat loads due to their flexibility. However, sometimes, the CuCrZr block was eroded by intense plasma events like ELMs,
VDE, and arcing, leading to the production of massive impurities. In this work, we proposed an approach to solve this problem by coating a W film on the CuCrZr block using the cathodic arc deposition method. The thermal behavior and suitability of the W film as a plasma facing component
(PFC) was evaluated by using a DUT-PSI device. The four coatings of different thicknesses were tested under the same parameters. After a thermal test, the coating surface was analyzed by using the scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) technique. The results obtained provided the evidence that the W coating of thickness from 5 μ;m to 13 μ;m is capable of resisting a heat flux of up to 1 MW/m2. The coating of thickness 17 μ;m showed some cracks as a result of the heat flux testing. The formation of cracks was started after the appearance of blisters on the coating surface which weakened the coating and initiated the formation of cracks.
The blisters were removed to uncover the erosion. In our study, we found that W coating could be employed to protect the CuCrZr blocks of both the dome and baffle in the upper divertor in the EAST from aggressive heat environment.