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Tytuł:
Graphene-Based Composite Membrane for Water Desalination
Autorzy:
Dybowski, K.
Kowalczyk, P.
Kula, P.
Jeziorna, A.
Atraszkiewicz, R.
Kołodziejczyk, Ł.
Zawadzki, P.
Nowak, D.
Kazimierczak, T.
Kucińska, M.
Powiązania:
https://bibliotekanauki.pl/articles/354170.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
graphene
desalination
water filtration
polycrystalline graphene
graphene composite
Opis:
The article presents the results of studies on the efficacy of water desalination (i.e. Elimination of NaCl ions from the solution) using graphene-polyamide composite membranes. The membranę used for filtration consists of a monolayer of polycrystalline graphene on a porous polyamide carrier support (nylon 66). The degree of desalination for an aqueous NaCl solution percolated through the membrane was 18%. In the future this type of membrane may replace the currently used reverse osmosis membranes.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 3; 1379-1383
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of the Method of Separating Graphene from the Growth Substrate on the Quality of the 2D Material Obtained
Autorzy:
Dybowski, K.
Romaniak, G.
Kula, P.
Jeziorna, A.
Kowalczyk, P.
Atraszkiewicz, R.
Kołodziejczyk, Ł.
Nowak, D.
Zawadzki, P.
Kucińska, M.
Powiązania:
https://bibliotekanauki.pl/articles/351974.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
graphene
polycrystalline graphene
electrochemical delamination
chemical etching
graphene transfer
Opis:
This article presents the research results on impact of the method of polycrystalline graphene layers separation from the growth substrate on the obtained carbon material quality. The studies were carried out on graphene sheets obtained by metallurgical method on a liquid metal substrate (HSMG® graphene). The graphene was separated using chemical etching method or the electrochemical delamination method, by separating by means of electrolysis. During electrolysis, hydrogen is emitted on a graphene-covered of cathode (metal growth substrate) as a result of the voltage applied. The graphene layer breaks away from metallic substrate by gas accumulation between them. The results from these separation processes were evaluated by means of different tools, such as SEM, TEM and AFM microscopy as well as Raman Spectroscopy. In summary, the majority of analyses indicate that the graphene obtained as a result of hydrogen delamination possesses higher purity, smaller size and number of defects, its surface is smooth and less developed after the transfer process to the target substrate.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 4; 1321-1326
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The sensitivity of sensor structures with oxide graphene exposed to selected gaseous atmospheres
Autorzy:
Pustelny, T.
Drewniak, S.
Setkiewicz, M.
Maciak, E.
Urbańczyk, M.
Procek, M.
Gut, K.
Opilski, Z.
Jagiello, J.
Lipinska, L.
Powiązania:
https://bibliotekanauki.pl/articles/200229.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
graphene
graphene oxide
gas sensors
resistive sensors
Opis:
The paper presents the results of investigations on the resistive structure with a graphene oxide (GO) sensing layer. The effects of dangerous gases (hydrogen and nitrogen dioxide) on the structure were studied; the resistance changes were examined during the flow of the selected gas in the atmosphere of synthetic air. Measurements were performed with a special emphasis on the detection of low concentrations of the analyzed gases. The reactions of the sensing structure to the effect of nitrogen and synthetic air at different humidity were also tested. Much attention was also paid to the fast response of the sensor to the changes in the gas atmosphere. The thin palladium layer (~2 nm) has been applied in order to improve the sensing properties of the structure. The investigations were performed in the temperature range from RT to 120°C and the analyzed gases in synthetic air were batched alternately with pure synthetic air.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 3; 705-710
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Graphene-based Current Mode Logic Circuits : a Simulation Study for an Emerging Technology
Autorzy:
Abdollahi, Hassan
Hooshmand, Reza
Owlia, Hadi
Powiązania:
https://bibliotekanauki.pl/articles/226818.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
current mode logic (CML)
graphene
graphene FET
low-power design
Opis:
In this paper, the usage of graphene transistors is introduced to be a suitable solution for extending low power designs. Static and current mode logic (CML) styles on both nanoscale graphene and silicon FINFET technologies are compared. Results show that power in CML styles approximately are independent of frequency and the graphene-based CML (G-CML) designs are more power-efficient as the frequency and complexity increase. Compared to silicon-based CML (Si-CML) standard cells, there is 94% reduction in power consumption for G-CML counterparts. Furthermore, a G-CML 4-bit adder respectively offers 8.9 and 1.7 times less power and delay than the Si-CML adder.
Źródło:
International Journal of Electronics and Telecommunications; 2019, 65, 3; 381-388
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structure and Properties of Nanocomposite Nickel/Graphene Oxide Coatings Produced by Electrochemical Reduction Method
Autorzy:
Cieślak, G.
Trzaska, M.
Powiązania:
https://bibliotekanauki.pl/articles/354431.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
graphene oxide
nanocomposites
electrodeposition
nickel/graphene oxide coatings
corrosion tests
Opis:
The paper presents the results of research on nanocomposite nickel/graphene oxide (Ni/GO) coatings produced by electrochemical reduction method on a steel substrate. Discussed is the method of manufacturing composite coatings with nickel matrix and embedded graphene oxide flakes. For comparative purposes, the studies also included a nanocrystalline Ni coating without embedded graphene oxide flakes. Graphene oxide was characterized by Raman spectroscopy, infrared spectroscopy (FTIR) and transmission (TEM) and scanning (SEM) electron microscopy. Results of studies on the structure of nickel and composite Ni/GO coatings deposited in a bath containing different amount of graphene oxide are presented. The coatings were characterized by scanning electron microscopy, light microscopy, Raman spectroscopy and X-ray diffraction. The adhesion of the prepared coatings to the substrate was examined by the scratch method. The microhardness of the coatings was measured using the Vickers method on perpendicular cross-sections to the surface. Corrosion tests of the coatings were investigated using the potentiodynamic method. The influence of graphene oxide on the structure and properties of composite coatings deposited from baths with different content of graphene oxide was determined.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 4; 1479-1486
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation on Mechanical Properties and Microstructures of Aluminum Hybrid Composites Reinforced with Al2O3/GNPs Binary Particles
Autorzy:
Şenel, M. Can
Gürbüz, M.
Powiązania:
https://bibliotekanauki.pl/articles/2049630.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
composite
aluminum
graphene
alumina
hybrid
Opis:
Nowadays, aluminum-based composites have been produced by pure alumina (Al2O3) or pure graphene nanoplatelets (GNPs) in aluminum matrix because of the high compressive strength of alumina and the solid lubricant properties of graphene. However, there are no studies on the influence of both alumina and graphene reinforced aluminum composites. In this study, Al-Al2O3 and Al-Al2O3-GNPs composites were reinforced with pure alumina (between 0 and 30 wt.%), pure graphene (0, 0.1, 0.3, 0.5 wt.%), and their hybrid forms (Al2O3-GNPs) by the powder metallurgy method. This method involved ultrasonic dispensing, mixing, filtering, drying, pressing, and sintering processes. From the test results, the micro Vickers hardness of pure aluminum (28.2±1 HV) improved to 51.5±0.8 HV (Al-30Al2O3) and 63.1±1 HV (Al-30Al2O3-0.1GNPs). Similarly, the ultimate compressive strength (UCS) enhanced from 92.4±4 MPa (pure aluminum) to 165±4.5 MPa (Al-30Al2O3) and 188±5 MPa (Al-30Al2O3-0.1GNPs), respectively. In conclusion, the Vickers hardness and ultimate compressive strength of aluminum hybrid composites improved up to 0.1 wt.% graphene content. After 0.1 wt.% graphene content, these mechanical properties decreased because of the clumping of graphene nanoparticles.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 1; 97-106
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigating Sintering Behavior of the Graphene Nanoplatelets (GNPs) Reinforced Aluminum Nanocomposites Via Low Energy Solution Ball Milling
Autorzy:
Baig, Zeeshan
Mamat, Othman
Mustapha, Mazli
Ali, Sadaqat
Powiązania:
https://bibliotekanauki.pl/articles/355724.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
graphene
aluminum
milling
dispersion
hardness
wear
Opis:
Owing to the excellent properties, graphene nanoplatelets (GNPs) show great reinforcing ability to improve the mechanical and tribological properties of Al nanocomposites for many automotive applications. In this work, the GNPs dispersion and reinforcing effect in Al nanocomposite was tested. Solvent dispersion via tip sonication and facile low energy ball milling (tumbling milling) using two milling speeds 200 and 300 rpm were employed to develop GNPs/Al powders. Sintering response of the GNPs/Al sintered samples wasgauged at two temperatures (550°C and 620°C). The effects of GNPs content, milling rotation speed and sintering temperature on the density, hardness and wear properties of the nanocomposite were examined. The results indicate that relative density % decreases with increasing GNPs content due to possible reagglomeration. The highest hardness of 35.6% and wear rate of 76.68% is achieved in 0.3 wt.% GNPs/Al nanocomposite processed at 300 rpm and 620°C as compared to pure Al due to uniform dispersion, higher diffusion rate at a higher temperature and effective lubrication effect.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 2; 755-759
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Predictive modeling and machining performance optimization during drilling of polymer nanocomposites reinforced by graphene oxide/carbon fiber
Autorzy:
Kumar, Jogendra
Verma, Rajesh Kumar
Mondal, Arpan Kumar
Powiązania:
https://bibliotekanauki.pl/articles/139771.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
surface roughness
RSM
thrust force
optimization
graphene
Opis:
This paper explores the parametric appraisal and machining performance optimization during drilling of polymer nanocomposites reinforced by graphene oxide/-carbon fiber. The consequences of drilling parameters like cutting velocity, feed, and weight % of graphene oxide on machining responses, namely surface roughness, thrust force, torque, delamination (In/Out) has been investigated. An integrated approach of a Combined Quality Loss concept, Weighted Principal Component Analysis (WPCA), and Taguchi theory is proposed for the evaluation of drilling efficiency. Response surface methodology was employed for drilling of samples using the titanium aluminum nitride tool. WPCA is used for aggregation of multi-response into a single objective function. Analysis of variance reveals that cutting velocity is the most influential factor trailed by feed and weight % of graphene oxide. The proposed approach predicts the outcomes of the developed model for an optimal set of parameters. It has been validated by a confirmatory test, which shows a satisfactory agreement with the actual data. The lower feed plays a vital role in surface finishing. At lower feed, the development of the defect and cracks are found less with an improved surface finish. The proposed module demonstrates the feasibility of controlling quality and productivity factors.
Źródło:
Archive of Mechanical Engineering; 2020, LXVII, 2; 229-258
0004-0738
Pojawia się w:
Archive of Mechanical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Study of Copper Alloy with Graphene Additive via x-Ray Diffraction
Autorzy:
Masri, Mohamad Najmi
Mohammad, M.
Yusoff, Mahani
Mamat, Sarizam
Teo, Pao Ter
Othman, R.
Irfan, Abd Rahim
Singh, Pramod K.
Powiązania:
https://bibliotekanauki.pl/articles/2134097.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
copper alloy
graphene
powder metallurgy
copper
zinc
Opis:
This study evaluated the effect of milling speed and compaction pressure on the densification and morphology of the CuZn-Gr composite. The composite was prepared by using the powder metallurgy technique. The effect on the microstructural and compaction was determined based on different milling speeds. The different milling speeds involved were 175, 200, 225, and 250 rpm. Meanwhile, the different compaction pressures used in this study were 127, 250, 374, and 500 MPa. The properties of the milled powder gave the result to green density and densification parameters. The XRD pattern of Cu and Zn broadened as milling time increased.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 3; 1051--1053
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The sensibility of resistance sensor structures with graphene to the action of selected gaseous media
Autorzy:
Pustelny, T.
Setkiewicz, M.
Drewniak, S.
Maciak, E.
Stolarczyk, A.
Urbańczyk, M.
Procek, M.
Gut, K.
Opilski, Z.
Pasternak, I.
Strupinski, W.
Powiązania:
https://bibliotekanauki.pl/articles/200915.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
graphene
resistance
sensor
hydrogen sensor
nitrogen dioxide sensor
Opis:
The paper presents resistance sensor structures with a graphene sensing layer. The structures were tested concerning their sensitivity to the affects of hydrogen, nitrogen dioxide and steam in an atmosphere of a synthetic air. Investigations have proved that resistance structures with a graphene layer are sensitive to the presence of the tested gases. The resistance of the structures amounted to about 10Ω, whereas changes in the resistances affected by the external gaseous medium were contained within the range of a several mΩ. The investigations confirmed that the resistance structures with graphene exposed to the affect of hydrogen in atmosphere of synthetic air change their resistances practically at once (within the order of only a few seconds). This indicates that such structures might be practically applied in sensors of hydrogen ensuring a short time of response.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 2; 293-300
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Copper-Carbon Nanoforms Composites - Processing, Microstructure and Thermal Properties
Autorzy:
Pietrzak, K.
Gładki, A.
Frydman, K.
Wójcik-Grzybek, D.
Strojny-Nędza, A.
Wejrzanowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/350995.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
metal matrix composite
sintering
copper
graphene
thermal diffusivity
Opis:
The main current of publication is focused around the issues and problems associated with the formation of composite materials with Cu matrix and reinforcing phases in the various carbon nanoforms. The core of the research has been focused on thermal conductivity of these composites types. This parameter globally reflects the state of the structure, quality of raw materials and the technology used during the formation of composite materials. Vanishingly low affinity of copper for carbon, multilayered forms of graphene, the existence of critical values of graphene volume in the composite are not conducive to the classic procedures of composites designing. As a result, the expected, significant increase in thermal conductivity of composites is not greater than for pure copper matrix. Present paper especially includes: (i) data of obtaining procedure of copper/graphene mixtures, (ii) data of sintering process, (iii) the results of structure investigations and of thermal properties. Structural analysis revealed the homogenous distribution of graphene in copper matrix, the thermal analysis indicate the existence of carbon phase critical concentration, where improvement of thermal diffusivity to pure copper can occur.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 2B; 1307-1310
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Behavioural Model of Graphene Field-effect Transistor
Autorzy:
Łuszczek, Maciej
Turzyński, Marek
Świsulski, Dariusz
Powiązania:
https://bibliotekanauki.pl/articles/1844478.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
graphene field effect transistor
behavioural models
circuit simulation
sensors
Opis:
The behavioural model of a graphene field-effect transistor (GFET) is proposed. In this approach the GFET element is treated as a “black box” with only external terminals available and without considering the physical phenomena directly. The presented circuit model was constructed to reflect steady-state characteristics taking also into account GFET capacitances. The authors’ model is defined by a relatively small number of equations which are not nested and all the parameters can be easily extracted. It was demonstrated that the proposed model allows to simulate the steady-state characteristics with the accuracy approximately as high as in the case of the physical model. The presented compact GFET model can be used for circuit or system-level simulations in the future.
Źródło:
International Journal of Electronics and Telecommunications; 2020, 66, 4; 753-758
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical Properties of Graphene Oxide–Copper Composites
Autorzy:
Duda, P.
Muzyka, R.
Robak, Z.
Kaptacz, S.
Powiązania:
https://bibliotekanauki.pl/articles/351676.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
composites of copper
graphene oxide
surface microgeomety
tribological properties
Opis:
Due to their characteristics, sintered Cu-C composites are materials used in electrical equipment. These characteristics include high electrical conductivity, thermal conductivity and excellent resistance to abrasion. Currently, graphite nanopowder is used successfully as a carbon material. Metal-graphite, which is created on its basis, exists in different proportions of graphite to metal. A larger graphite content has a positive effect on smaller wear of commutators and rings. In contrast, a material with a higher copper content is used at high current densities. An example of such machines is a DC motor starter characterized by low voltage and large current. Tribological properties of Cu-C composites depend on the form of carbon they include. Owing to the capability to manufacture graphene, it has become possible to produce composites with its content. The present study tested the effect of a graphene oxide content on tribological properties in contact with steel. Tests were conducted on a ball-on-disk apparatus in conditions of dry friction. Microscopic observation was performed on the Hitachi SU70 field emission electron microscope. EDS analyses were performed using the Thermo Scientific X-ray Microanalysis system. Disk wear and surface geometrical structure parameters (SGP) of the samples after tribological tests were determined on the basis of measurements made on the Talysurf 3D contact profilometer from Taylor Hobson.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 2A; 863-868
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Experimental Conditions on Deposition of Silver Nanoparticles Onto Surface of Graphene Oxide
Wpływ warunków eksperymentalnych na proces osadzania nanocząstek srebra na powierzchni tlenku grafenu
Autorzy:
Wojnicki, M.
Mania, I.
Marzec, M.
Gajewska, M.
Mech, K.
Powiązania:
https://bibliotekanauki.pl/articles/352579.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
silver nanoparticles
deposition
graphene oxide
nanocząstki srebra
osadzanie
tlenek grafenu
Opis:
Present work describes the influence of silver nanoparticles precursor form as well as the impact of graphene oxide initial concentration on deposition of the silver nanoparticles onto graphene oxide. Borane dimethylamine complex (DMAB) was used as the reducing agent. It was observed that application of silver ammonia complexes as the silver nanoparticles precursor as well as alkaline solution effect in higher quantity of deposited AgNPs in comparison to deposition process with the use of silver(I) nitrate in acidic solution.
Praca przedstawia wyniki badań nad wpływem wybranych parametrów na proces syntezy i osadzania nanocząstek srebra na powierzchni tlenku grafenu. W badaniach uwzględniono wpływ następujących czynników: stężenie początkowe tlenku grafenu, stężenie początkowe prekursora oraz jego rodzaju. Jako reduktor jonów Ag(I) zastosowano dimetyloamino boran (DMAB). Stwierdzono, iż zastosowanie kompleksu amoniakalnego srebra jako prekursora, jak również zastosowanieśrodowiska alkaicznego skutkuje wyższą efektywnością procesu osadzania AgNPs na powierzchni tlenku grafenu w porównaniu do procesu prowadzonego z zastosowaniem azotanu(V) srebra(I) w środowisku kwaśnym.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 4; 2631-2636
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High Strength Metallurgical Graphene – Mechanisms of Growth and Properties
Grafen metalurgiczny o wysokiej wytrzymałości – mechanizmy wzrostu i właściwości
Autorzy:
Kula, P.
Szymański, W.
Kołodziejczyk, Ł.
Atraszkiewicz, R.
Dybowski, K.
Grabarczyk, J.
Pietrasik, R.
Niedzielski, P.
Kaczmarek, Ł.
Cłapa, M.
Powiązania:
https://bibliotekanauki.pl/articles/353046.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
graphene
growth mechanism
electrical properties
grafen
mechanizm wzrostu
właściwości elektryczne
Opis:
In this work, the growth mechanisms of chemical vapor deposited and metallurgical graphene and their selected mechanical and electrical properties were investigated. The study revealed the influence of the growth mechanisms on monoand poly-crystalline nanostructures of synthesized graphene monolayers. The structure of flake boundaries greatly affects both the mechanical and electrical properties. The key factors are overlapping of the graphene flakes, their degree of mismatch and the presence of π type bonds. All of these issues should be taken into account when developing industrially scaled technologies for graphene manufacturing.
W pracy przedstawiono wyniki badań mechanizmów wzrostu oraz wybranych właściwości mechanicznych i elektrycznych grafenu chemicznie osadzanego z fazy gazowej oraz grafenu metalurgicznego. Badania wykazały wpływ mechanizmów wzrostu na mono- i polikrystaliczne nanostruktury syntetyzowanych monowarstw grafenu. Struktura granic płatków grafenu znacząco wpływa zarówno na właściwości mechaniczne jak i elektryczne. Kluczowymi czynnikami są: nakładanie się płatków grafenu, stopień ich niedopasowania oraz obecność wiązań typu π. Wszystkie te aspekty powinny być brane pod uwagę przy opracowywaniu technologii produkcji grafenu na skalę przemysłową.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 4; 2535-2542
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 23

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