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Wyszukujesz frazę "Nanolayers" wg kryterium: Temat


Wyświetlanie 1-5 z 5
Tytuł:
Application of chemical pre-treatment on the polished surface of aluminium alloys
Autorzy:
Kraus, P.
Svobodova, J.
Cais, J.
Lattner, R.
Powiązania:
https://bibliotekanauki.pl/articles/957952.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
sol-gel technology
nanolayers
aluminium alloys
surface roughness
SEM
Opis:
This paper reports the preparation and characterization of thin transparent nanolayers with phase composition ZrF4 and different modification of SiO2 with special focus on affecting the surface roughness of the material and the way of exclusion of the thin nanolayer on the surface of the polished aluminium material. The thin nanolayer was prepared by the sol-gel method. The final treatment based on PTFE was applied on the surface of some samples. This treatment is suitable for increasing wear resistance. The films were characterized with help of SEM microscopy and EDS analysis. The surface roughness was measured with classical surface roughness tester. The results on this theme have already published but not on the polished surface of the aluminium material. The results from the experiment show the problems with application of these nanolayers because a cracks were found on the surface of the material and deformations of the layer after application of the PTFE final layer. The surface layer formation is discussed.
Źródło:
Advances in Science and Technology. Research Journal; 2016, 10, 32; 17-23
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metody elektrochemiczne obróbki stali używanych w transporcie
Electrochemical methods of processing of steels used in transport
Autorzy:
Kułakowski, M.
Rokosz, K.
Powiązania:
https://bibliotekanauki.pl/articles/312241.pdf
Data publikacji:
2017
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
trawienie
polerowanie elektrochemiczne
pasywowanie
nanowarstwy pasywne
stale nierdzewne
etching
electropolishing
passivation
passive nanolayers
stainless steels
Opis:
Stale nierdzewne zawierają minimum 50% żelaza i powyżej 10,5% chromu, co daje im odporność korozyjną zbliżoną do chromu. Z tego względu są szeroko stosowane do budowy zbiorników i cystern do przewozu środków stężonych chemicznych i płynów spożywczych. Ich odporność korozyjna wynika z pasywnych nanowarstw wzbogaconych w związki chromu, które mogą być uzyskiwane między innymi poprzez polerowanie elektrochemiczne przy niskich i wysokich gęstościach prądów oraz z użyciem pola magnetycznego, jak i pasywacji. W artykule przedstawiono również skład chemiczny dwóch warstw pasywnych otrzymanych na stopowej stali austenitycznej AISI 316L po standardowym polerowaniu elektrochemicznym (EP) oraz z użyciem pola magnetycznego (MEP), co pokazuje możliwości sterowania składem nanowarstwy pasywnej.
Stainless steel is more resistant to corrosion as carbon one and it is increasingly used in transportation as construction materials for cisterns and tanks transporting chemicals and foodstuffs. Generally, under normal conditions on the surface of stainless steel is present a self-healing, passive layer that is responsible for the corrosion resistance of this material, but in most applications thicker and more reliable layers are required. Hence in this paper electrochemical methods of obtaining in controlling conditions passive layer and microsmothing of surface on stainless steel are presented. In addition, pickling methods, electrochemical methods of passivation, electropolishing (EP), high-current-density electropolishing (HDEP) and magnetoelectropolishing (MEP), in that article were desribed, too.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2017, 18, 7-8; 353-356
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical modeling of fracture during nanoindentation of the TiN coatings obtained with the PLD process
Autorzy:
Perzyński, K.
Madej, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/202038.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
crack
nanoindentation
nanolayers
TiN
XFEM
Opis:
In order to improve mechanical, frictional or biocompatibility behavior of well know materials like titanium (Ti) or titanium nitride (TiN) scientists are trying to develop new manufacturing and processing operations. One of those methods, that provide interesting results, is called deposition process. During deposition a material is upgraded with new surface layers that are characterized by specific required properties. These layers have usually different mechanical properties in comparison with a substrate material. A combination of different properties of the deposited layers can significantly change behavior of the structure under an exploitation condition. However, layers have usually nanometer scale, which causes problems with performing standard plastometric tests. One of the possibilities to solve this issue is an application of specially designed tests like nanoindentation. Nanoindentation can provide valuable information regarding mechanical and strength behavior of nanostructure components. These investigations are of importance to properly identify and design properties of the mentioned deposited materials. Unfortunately, experimental analyses at these scales are usually very expensive. That is why Authors decided to develop a numerical model of the nanoindentation test to investigate material behavior under loading conditions that can support experimental research. The overall aim of this research is development of a failure model, which can take into account morphology of microstructure of ceramic TiN layer deposited on the silicon substrate. Modeling of crack behavior was realized on the basis of the extended finite element method (XFEM).
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 4; 973-978
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
XPS Analysis of nanolayers obtained on AISI 316L SS after Magnetoelectropolishing
Autorzy:
Rokosz, Krzysztof
Hryniewicz, Tadeusz
Powiązania:
https://bibliotekanauki.pl/articles/1192093.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
XPS Analysis
Magnetoelectropolishing (MEP)
AISI 316L SS
Nanolayers
Opis:
In the present paper, the passive layers' chemical compositions of AISI 316L austenitic stainless steel samples after three treatments, such as mechanical/abrasive polishing (MP), standard electropolishing (EP) and magnetoelectropolishing (MEP) are displayed. For the surface studies after each treatment, XPS analysis was performed. It has been noted that after MP treatment the Cr/Fe ratio in the passive layer is the lowest and equals to about 1, whereas after the MEP it is close to 3. Additionally, it has to be reported that the passive layers after MP consist mainly of Cr2O3 and Fe2O3, after a standard EP treatment – of CrOOH and FeOOH, and after MEP – of Cr(OH)3 and FeOOH compounds. Concerning the surface layer compositions, in the passive layer formed after MP the detected iron consisted partly of Fe0 (46.5 at %) and partly of iron compounds Fe2+ and Fe3+ (53.5 at %), whereas the detected chromium consisted of Cr0 (16.5 at %) and mostly of chromium compounds Cr3+ (80.8 at%), with a small amount of Cr6+ (2.7 at %). In case of the nanolayer after EP treatment, the detected iron consisted of Fe0 (39.5 at %) and iron compounds Fe2+ and Fe3+ (60.5 at %), whereas the detected chromium consisted in a small amount of Cr0 (6.6 at %), and mostly chromium compounds Cr3+ (83.8 at %) with some Cr6+ (9.6 at %). The XPS analysis of nanolayer formed on AISI 316L after MEP indicates that the detected iron consisted partly of Fe0 (27.1 at %) and mostly of iron compounds Fe2+ and Fe3+ (72.9 at %) whereas the detected chromium contained Cr0 (18 at %) and chromium compounds of Cr3+ (76 at %) and Cr6+ (6 at %).
Źródło:
World Scientific News; 2016, 37; 232-248
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The kinetics of growth of high entropy alloy layers sputtered on Tungsten powder substrate
Autorzy:
Stefaniak, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/1179528.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
ICP analysis
high entropy alloy
magnetron sputtering
nanolayers
Opis:
Tungsten powder particles have been encapsulated with thin CrMnFeCoNi layers by magnetron sputtering method using high entropy alloy as a target. In the course of sputtering the powder surface has been periodically analyzed. The multimetallic coatings were being dissolved in 2 M HCl and the obtained solutions were analyzed by ICP method to determine Cr3+, Mn2+, Fe2+, Co2+ and Ni2+ ions concentration. The aim of the analysis was comparison of atomic proportions of the elements in the target and in obtained layer and indirect determining of the layer thickness.
Źródło:
World Scientific News; 2017, 76; 60-65
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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