Temat: plasma - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Nanostrukturalne powłoki na bazie węglika chromu Cr3C2 wytwarzane różnymi metodami PVD
Nanostructural coatings with chromium carbide Cr2C3 obtained by different PVD methods
Autorzy:: Mazurkiewicz, A.
Richert, M. W.
Smolik, J. A.
Tematy:: Plasma Spraying
EB-PVD
nanomateriał
mikrostruktura
plasma spraying
nanomaterials
microstructure; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
Powiązania:: https://bibliotekanauki.pl/articles/256869.pdf Link otwiera się w nowym oknie
Opis:: W pracy przedstawiono badania mikrostruktury i twardości węglikowych powłok kompozytowych Cr3C2 - Ni/Cr otrzymanych czterema różnymi metodami PVD, w tym: natrysku plazmowego - Plasma Spraying, natrysku płomieniowego naddźwiękowego - Hot Velocity Oxygen Fuel (HVOF), metodą odparowania materiałów wiązką elektronową - Electron Beam (EB PVD) oraz metodą hybrydową będącą połączeniem odparowania materiałów wiązką elektronową oraz odparowania łukowego (Arc-EB PVD). Wykazano, że w metodach natryskowych, jak również w metodach plazmowych wykorzystujących proces odparowania materiału wiązką elektronów, w warunkach o zbliżonej energii procesu sprzyjających kształtowaniu powłok nanometrycznych następuje kształtowanie podobnej mikrostruktury. Twardość powłok kompozytowych Cr3C2 - Ni/Cr nie jest zależna jedynie od ich mikrostruktury, ale również istotnie zależy od metody ich wytwarzania.
The paper presents the results of microstructure and hardness measurements for composite coatings Cr3C2 - i/Cr obtained by different surface treatment methods: Plasma Spraying, Hot Velocity Oxygen Fuel (HVOF), Electron Beam (EB PVD) and original hybrid surface treatment method as connection of Arc Evaporation and Electron Beam (Arc-EB PVD). Authors proved that during the deposition processes realised by Plasma Spraying and Electron Beam as well as by HVOF and hybrid method Arc-EB PVD, the energy of deposition processes are comparable, so in effect the comparable microstructures were obtained. Simultaneously was proved that the hardness of composite coatings Cr3C2 - Ni/Cr is not only depend on those microstructure but on the deposition method as well.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 2.

Tytuł:: The effect of electrolyte composition on the plasma electrolyte oxidation and phase composition of oxide ceramic coatings formed on 2024 aluminium alloy
Autorzy:: Posuvailo, V. M.
Kulyk, V. V.
Duriagina, Z. A.
Koval’chuck, I. V.
Student, M. M.
Vasyliv, B. D.
Tematy:: microstructure
hydrogen peroxide
porosity
plasma electrolyte synthesis
plasma electrolyte oxidation
mikrostruktura
nadtlenek wodoru
porowatość; Pokaż więcej
Wydawca:: Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Powiązania:: https://bibliotekanauki.pl/articles/1818491.pdf Link otwiera się w nowym oknie
Opis:: Purpose: Purpose of this work is to analyse the process of synthesis of oxide ceramic coatings in plasma electrolytes on 2024 aluminium alloy and to form an electrolyte which allows to reduce energy consumption for the coating formation. Design/methodology/approach: The oxide ceramic coatings were synthesized on 2024 aluminium alloy. The coatings were formed by the alternate application of anode and cathode pulses to the sample. X-ray diffraction analysis of coatings was performed on a DRON-3.0 X-ray diffractometer using CuKa radiation. The thickness of the coatings was determined using a CHY TG-05 thickness gauge. The porosity of the coatings was investigated by analysing the micrographs of the plasma electrolyte oxidation (PEO) coatings obtained on a scanning electron microscope at x500 magnification using the image processing technique. Findings: The electrolyte with 5 g/l H2O2 additive have been elaborated as an optimal composition for synthesis of a coating with an increased content of corundum (a-Al2O3) as compared to a coating synthesized in the same mode in the 3KOH+2Na2SiO3 electrolyte without H2O2. This synthesis mode allows obtaining a coating with a high corundum content at low energy consumption. Research limitations/implications: For further optimization of the synthesis modes, it is necessary to analyse the influence of the phase composition and porosity of the obtained oxide ceramic coatings on their microhardness, wear resistance, and corrosion resistance. Practical implications: Based on the developed modes of synthesis of the coatings, it will be possible to obtain wear and corrosion resistant oxide ceramic coatings with predetermined functional properties and to reduce energy consumption for their formation. Originality/value: Methods for accelerating the formation of coatings have been proposed and tested, in particular, by adding various amounts of hydrogen peroxide to the electrolyte. The content of oxides in the obtained coatings, in particular, their ratios at various concentrations of hydrogen peroxide in the electrolyte, were determined by X-ray phase analysis. The modes of synthesis of the coatings were developed which allow obtaining a continuous coating without cracks with simultaneous decreasing porosity from 4.32% to 3.55-3.53%.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 3.

Tytuł:: Microstructure and Micromechanical Behaviors of Bulk Amorphous Alloy Prepared by Spark Plasma Sintering
Autorzy:: Ge, Yaqiong
Chang, Zexin
Wang, Wenxian
Hou, Qingling
Tematy:: bulk amorphous alloy
spark plasma sintering
microstructure
micromechanical behaviors; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/2203707.pdf Link otwiera się w nowym oknie
Opis:: This study aimed to prepare Zr55Cu30Al10Ni5 bulk amorphous alloys by spark plasma sintering of raw amorphous alloy powders and investigate their microstructure and micromechanical behaviors. When the sintering temperature (Ts) was 675K, which was lower than the glass transition temperature (Tg) of the material, the sintered sample was almost fully amorphous but the density was lower. However, when Ts was 705K, which was higher than Tg, partial crystallization occurred, but the density was higher. The hardness of the bonding zone of the sintered sample at 675K was 5.291 GPa due to the lower density, which was lower than that at 705K, and the hardness at 705K was 8.836 GPa. The generation of thermodynamically stable intermetallic phases, the hardness, and the elastic modulus of the samples sintered above Tg were higher due to the higher density.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 4.

Tytuł:: Fabrication of Cu-Based SiC Composites by Spark Plasma Sintering of Cu-Nitrate Coated SiC Powders
Autorzy:: Jeong, Y.-K.
Kim, Y. S.
Oh, S.-T.
Tematy:: Cu-SiC composite
Cu-nitrate
spark plasma sintering
microstructure; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/354995.pdf Link otwiera się w nowym oknie
Opis:: An optimum route to fabricate the Cu-based SiC composites with homogeneous microstructure was investigated. Three methods for developing the densified composites with sound interface between Cu and SiC were compared on the basis of the resulting microstructures. Starting with three powder mixtures of elemental Cu and SiC, elemental Cu and PCS coated SiC or PCS and Cunitrate coated SiC was used to obtain Cu-based SiC composites. SEM analysis revealed that the composite fabricated by spark plasma sintering using elemental SiC and Cu powder mixture showed inhomogeneous microstructure. Conversely, dense microstructure with sound interface was observed in the sintered composites using powder mixture of pre-coated PCS and Cu-nitrate onto SiC. The relationship between powder processing and microstructure was discussed based on the role of coating layer for the wettability.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 5.

Tytuł:: Manufacture of MoO3 Coating Layer Using Thermal Spray Process and Analysis of Microstructure and Properties
Autorzy:: Hwang, Yu-Jin
Kim, Kyu-Sik
Park, Jae-Sung
Lee, Kee-Ahn
Tematy:: MoO3
thermal spray
atmospheric plasma spray
microstructure
properties; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/2174568.pdf Link otwiera się w nowym oknie
Opis:: MoO3 thick film was manufactured by using a thermal spray process (Atmospheric Plasma Spray, or APS) and its micro-structure, phase composition and properties of the coating layer were investigated. Initial powder feedstock was composed of an orthorhombic α-MoO3 phase, and the average powder particle size was 6.7 μm. As a result of the APS coating process, a MoO3 coating layer with a thickness of about 90 μm was obtained. Phase transformation occurred during the process, and the coating layer consisted of not only α-MoO3 but also β-MoO3, MoO2. Phase transformation could be due to the rapid cooling that occurred during the process. The properties of the coating layer were evaluated using a nano indentation test. Hardness and reduced modulus were obtained as 0.47 GPa and 1.4 GPa, respectively. Based on the above results, the possibility of manufacturing a MoO3 thick coating layer using thermal spray is presented.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 6.

Tytuł:: Influence of Spark Plasma Sintering Temperature on Microstructure and Tthermoelectric Properties of Cu-Doped Bi0.5Sb1.495Te3 Compound
Autorzy:: Lee, Chul-Hee
Dharmaiah, Peyala
Song, Jun-Woo
Jeong, Kwang-Yong
Hong, Soon-Jik
Tematy:: bismuth antimony telluride
gas atomization
spark plasma sintering
microstructure
thermoelectric materials; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/353226.pdf Link otwiera się w nowym oknie
Opis:: Due to air pollution, global warming and energy shortage demands new clean energy conversion technologies. The conversion of industrial waste heat into useful electricity using thermoelectric (TE) technology is a promising method in recent decades. Still, its applications are limited by the low efficiency of TE materials in the operating range between 400-600 K. In this work, we have fabricated Cu_0.005 Bi_0.5Sb_1.495Te₃ powder using a single step gas atomization process followed by spark plasma sintering at different temperatures (623, 673, 723, and 773 K), and their thermoelectric properties were investigated. The variation of sintering temperature showed a significant impact on the grain size. The Seebeck coefficient values at room temperature increased significantly from 127 μVK to 151 μV/K with increasing sintering temperature from 623 K to 723 K due to decreased carrier concentration. The maximum ZT values for the four samples were similar in the range between 1.15 to 1.18 at 450 K, which suggest these materials could be used for power generation in the mid-temperature range (400-600 K).
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 7.

Tytuł:: Effect of Nb and Mo Addition on the Microstructure and Wear Behavior of Fe-Cr-B Based Metamorphic Alloy Coating Layer Manufactured by Plasma Spray Process
Autorzy:: Cho, Yong-Hoon
Ham, Gi-Su
Park, So-Yeon
Kim, Choongnyun Paul
Lee, Kee-Ahn
Tematy:: plasma spray
Fe-Cr-B based metamorphic alloy
Nb addition
microstructure
wear; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/2174563.pdf Link otwiera się w nowym oknie
Opis:: Fe-Cr-B-based metamorphic alloy coating layers were manufactured by plasma spray with a Fe-Cr-B-Mo-Nb composition (hereinafter, M+) powder. The microstructure and wear properties of the coating layers were investigated and compared with a metamorphic alloy coating layer fabricated with commercial m material. XRD analysis revealed that the M and M+ coating layers were composed of α-Fe, (Cr, Fe)2B, and some metallic glass phases. Wear test results showed that M+ coating layers had a superior wear resistance which had 1.48 times lower wear volume than M coating layers. Observations of the worn-out surfaces and cross-sections of the coating layers showed that M+ coating layer had relatively low oxides along the particle boundaries and it suppress a delamination behavior by the oxides.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 8.

Tytuł:: Selection of protective coatings obtained by plasma-spraying method for foundry industry
Dobór powłok ochronnych otrzymanych metodą natrysku plazmowego do zastosowania w przemyśle odlewniczym
Autorzy:: Richert, M.
Nejman, I.
Zawadzka, P.
Kacprzyńska-Gołacka, J.
Tematy:: plasma spraying
foundry industry
microstructure
wettability
natrysk plazmowy
przemysł odlewniczy
mikrostruktura
zwilżalność; Pokaż więcej
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Powiązania:: https://bibliotekanauki.pl/articles/264269.pdf Link otwiera się w nowym oknie
Opis:: This article presents results from the studies of protective coatings applied to industrial graphite molds used for the casting of non-ferrous metals. The selection of coatings was based on the results of measurements of surface wettability by liquid copper and microstructure examinations. The study involved industrial graphite molds with single-layer protective coatings of Al2O3 + 30%C and ZrO2-Y2O3 + 30%C as well as two-layer protective coatings of Al2O3 + 30%C /glassy carbon and ZrO2-Y2O3 + 30%C /glassy carbon.
W artykule przedstawiono wyniki badań powłok ochronnych przeznaczonych do ochrony grafitowych krystalizatorów stosowanych w przemyśle odlewniczym. Dobór powłok nastąpił na podstawie wyników badań mikrostruktury i pomiarów zwilżalności powierzchni przez ciekłą miedź. Badaniami objęto grafitowe krystalizatory z naniesionymi powłokami ochronnymi: jednowarstwowymi Al2O3 + 30%C i ZrO2-Y2O3 + 30%C oraz dwuwarstwowymi Al2O3 + 30%C /węgiel szklisty i ZrO2-Y2O3 + 30%C /węgiel szklisty.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 9.

Tytuł:: Effect of Process Control Agent on the Microstructure of Ni-Based ODS Superalloy Produced by Mechanical Alloying and Sintering
Autorzy:: Han, Ju-Yeon
Kang, Hyunji
Oh, Sung-Tag
Tematy:: Ni-based superalloy
process control agents
mechanical alloying
spark plasma sintering
microstructure; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/355242.pdf Link otwiera się w nowym oknie
Opis:: The effects of different types of process control agents (PCA) on the microstructure evolution of Ni-based oxide dispersion-strengthened superalloy have been investigated. Alloy synthesis was performed on elemental powders having a nominal composition of Ni-15Cr-4.5Al-4W-2.5Ti-2Mo-2Ta-0.15Zr-1.1Y₂O₃ in wt % using high energy ball milling for 5 h. The prepared powders are consolidated by spark plasma sintering at 1000°C. Results indicated that the powder ball-milled with ethanol as PCA showed large particle size, low carbon content and homogeneous distribution of elemental powders compared with the powder by stearic acid. The sintered alloy prepared by ethanol as PCA exhibited a homogeneous microstructure with fine precipitates at the grain boundaries. The microstructural characteristics have been discussed on the basis of function of the PCA.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 10.

Tytuł:: Characterization of Alumina-Titania Coatings Produced by Atmospheric Plasma Spraying on 304 SS Steel
Autorzy:: Djendel, M.
Allaoui, O.
Boubaaya, R.
Tematy:: alumina-titania coatings
atmospheric plasma spraying
304 stainless steel
process parameters
SEM
microstructure; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1031278.pdf Link otwiera się w nowym oknie
Opis:: The alumina-titania coatings produced by atmospheric plasma spraying are being developed for a wide variety of applications that require resistance to wear, erosion, cracking, and spallation. Consideration of parameters setting will develop reliable coatings with high performance properties for demanding coating application. Al₂O₃-3 wt% TiO₂ was used as the main coating. Ni 20%Cr₆Al powder was used as bond coat coating onto AISI 304 stainless steel substrate using Sulzer-Metco plasma spray system 9MC equipment.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Informacja

Wyszukujesz frazę "plasma" wg kryterium: Temat