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Wyszukujesz frazę "yttrium oxide" wg kryterium: Temat


Wyświetlanie 1-8 z 8
Tytuł:
Transparent yttrium oxide ceramics as potential optical isolator materials
Autorzy:
Kruk, A
Wajler, A
Mrozek, M
Zych, L
Gawlik, W
Brylewski, T
Powiązania:
https://bibliotekanauki.pl/articles/173500.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
transparent ceramics
optical properties
yttrium oxide
Opis:
The objective of the presented study was to investigate the usefulness of transparent, sintered yttrium oxide for application as optical isolators, i.e., materials with high Verdet constant. The study utilizes the magneto-optical Faraday effect. To obtain yttrium oxide sinters, a commercial Y2O3 powder was applied, with LiF added to facilitate sintering. As a result of hot-press sintering and heating, transparent, dense sinters were obtained. The structure and morphology of the powders and bulk samples and the optical properties of the latter were investigated by means of X-ray diffraction, scanning electron microscopy, visible and near-infrared reflectance spectroscopy, and a study of magneto-optical (Faraday) effects. Measurements of the Faraday effect in the wavelength range of 500–1000 nm indicate high Verdet constants for the above-described materials, which means that they can be effectively applied in laser optics.
Źródło:
Optica Applicata; 2015, 45, 4; 585-594
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preparation and Properties of Ti-Y2O3 Composites for Implant Applications
Autorzy:
Adamek, G.
Jakubowicz, J.
Dewidar, M.
Powiązania:
https://bibliotekanauki.pl/articles/353545.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Ti-based composites
yttrium oxide
mechanical alloying
biomaterials
Opis:
The paper presents the preparation of Ti-(1-30wt.%)Y2O3 composites using the mechanical alloying process. Ti based materials are the best metallic biomaterials because of their excellent properties: biocompatibility, low Young moduli and high corrosion resistance. Pure Ti and Y2O3 powders were alloyed under argon atmosphere in shaker type mill (Spex 8000) followed by pressing and sintering. The ultra-low grain size structure improves the mechanical properties and hardness of the new materials in comparison to microcrystalline Ti-based sinters. However, because of the porosity of approx. 20-30%, a decrease in the Young modulus is observed. Moreover, the new composites show good tendency towards covering by Ca-P compounds during soaking in SBF.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 2A; 663-666
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the possibility of using arc plasma melting technique in preparation of transparent yttria ceramics
Autorzy:
Kruk, Andrzej
Jany, Benedykt R.
Owczarczyk, Karolina
Madej, Dominika
Powiązania:
https://bibliotekanauki.pl/articles/173603.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
plasma arc melting
transparent ceramic
yttrium oxide
optical properties
Opis:
A state-of-the-art fabrication of Y2O3 transparent ceramic by arc plasma synthesis using commercial micron-size powders is reported. The morphological observations of the surface by scanning electron microscope shows that a dense microstructure can be obtained. Arc melted samples are made of a white core and transparent layer. X-ray diffraction studies and also Raman spectroscopy confirm that only one phase occurred in the core and in the transparent layer, and that the physicochemical difference exists. The obtained Y2O3 shell ceramics have pores but also relative low absorbance in the VIS-NIR region after double side polishing. The optical band gap and the refractive index are reported. It is concluded that arc plasma melting allows obtaining quickly (10 minutes) dense and highly transparent polycrystalline samples, especially in the VIS-IR spectral region.
Źródło:
Optica Applicata; 2019, 49, 2; 355-364
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research into morphology and phase structure in the surface of Al-Si alloy modified by yttrium oxide
Autorzy:
Zagulyaev, D.
Konovalov, S.
Gromov, V.
Melnikov, A.
Shlyarov, V.
Powiązania:
https://bibliotekanauki.pl/articles/201477.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
silumin
microstructure
electroexplosive alloying
yttrium oxide
mikrostruktura
tlenek itru
Opis:
Using methods of physical material studies (scanning electron microscopy and micro X-ray spectral analysis), a study was carried out with focus on alteration of structure and phase composition in surface layers of Al-Si alloy (silumin АК10М2N) treated in electroexplosive alloying with a multiphase plasma jet formed in the process of aluminum foil explosion and carrying particles of Y2O3 weighted powder portion. It was revealed that a porous surface layer with non-homogeneously distributed alloying elements (silicon, yttrium) in it is formed in any conditions of electroexplosive alloying of silumin. Thickness of the modified layer is different, varying 50 to 160 μm, depending on the zone to be examined. The modified surface consists basically of Al, Si and Y. Yttrium in the modified layer is thought to be an indirect evidence of better physical and mechanical properties of the surface layer in comparison with the base material.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 2; 173-177
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental and numerical study on the effect of creep behavior on epoxy composites reinforced with yttrium oxide powder
Autorzy:
Abed, B. H.
Jadee, K. J.
Battawi, A. A.
Powiązania:
https://bibliotekanauki.pl/articles/1839719.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
kompozyt epoksydowy
tlenek itru
pełzanie
współczynnik wagowy
epoxy composite
yttrium oxide
creep
ANSYS APDL
weight ratio
Opis:
The creep test is one of the important approaches to determining some mechanical properties of composite materials. This study was carried out to investigate the creep behaviour of an epoxy composite material that was reinforced with Y2O3 powder at weight ratios of 2%, 7%, 12%, 17% and 22%. Each volume ratio was subjected to five loads over the range of 1N to5N at a constant temperature of 16 ± 2°C. In this work, creep behaviour, stress and elasticity modulus were studied through experimental and numerical analyses. Results showed that increasing the weight ratio of Y2O3 powder enhanced creep characteristics.
Źródło:
International Journal of Applied Mechanics and Engineering; 2020, 25, 4; 203-213
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new chemical mechanical slurry for polishing yttrium aluminium garnet material with magnesium oxide, sodium metasilicate pentahydrate and zirconium dioxide abrasive particles
Autorzy:
Duc, Le Anh
Hieu, Pham Minh
Quang, Nguyen Minh
Powiązania:
https://bibliotekanauki.pl/articles/24084631.pdf
Data publikacji:
2023
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
chemical-mechanical polishing
yttrium aluminum garnet
magnesium oxide
abrasive particles
Opis:
This work provided a new chemical-mechanical polishing mixture with MgO, sodium metasilicate pentahydrate, ZrO2 abrasive particles, and deionized water. With chemical-mechanical slurry (CMS) proposed for polishing yttrium aluminum oxide (Y3Al5O12) the surface reaction layer formed with significantly reduced hardness compared to other Y3Al5O12 materials, these products combine with MgO to form montmorillonites (3MgO–Al2O3–3SiO2–3Y2O3–5Al2O3). With this formation, the surface layer of Y3Al5O12 material becomes soft and is easily removed by ZrO2 abrasive particles under the influence of mechanical polishing, resulting in superfine surfaces generated from the proposed CMS model. The experimental results show that the surface quality with CMS proposed gives the surface quality with Ra = 0.471 nm along with the material removal rate 31 (nm/min). Surface quality is improved by 71% along with a superior material removal rate (increased by 287%) compared to silica slurry. The results show excellent polishing ability from CMS proposed for polishing Y3Al5O12 materials.
Źródło:
Journal of Machine Engineering; 2023, 23, 2; 174--185
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling of Precipitate Oxide and Sulfide Inclusions Formation in Liquid Steel
Autorzy:
Didenchuk, D.
Kalisz, D.
Powiązania:
https://bibliotekanauki.pl/articles/379675.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
yttrium
non-metallic inclusions
oxide
sulfide
FactSage
itr
wtrącenia niemetaliczne
tlenek
siarczek
program FactSage
Opis:
The behaviour of non-metallic inclusions MnO, MnS, FeS, Al2O3, SiO2, Y2O3,Y2S3 in liquid steel were modelled in commercial software FactSage. It allowed for calculating and designing diagrams of dependence of inclusions formation from the concentration of yttrium in determined limits of aluminium and oxygen. As a result, the influence of the increasing yttrium concentration on the precipitations of oxide and sulfide inclusions is observed. The behavior of precipitation the another analyzed oxides and sulfides is also observed in liquid steel, giving a full composition in non-metallic inclusions, formatted in specified conditions. The amounts of mass fractions of Y2O3 and Y2S3 are increasing at the growing Y in liquid steel, which shows the active formation of these inclusions.
Źródło:
Archives of Foundry Engineering; 2015, 15, 4 spec.; 19-22
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dual Pore Cathode Materials for Solid Oxide Fuel Cells
Autorzy:
Mosiałek, M.
Zimowska, M.
Kharitonov, D.
Górski, M.
Krzan, M.
Komenda, A.
Powiązania:
https://bibliotekanauki.pl/articles/354965.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
solid oxide fuel cell
yttrium iron cobaltite
lanthanum strontium cobalt ferrite
composite cathode
electrochemical impedance spectroscopy
Opis:
In this work, we developed the lanthanum strontium cobalt ferrite and it’s composite with yttrium iron cobaltite (mass ratio of 1:1) cathodes as a thin layer on Ce0.8Sm0.2O1.9 electrolyte. Two kinds of electrode pastes were prepared, with and without 6 mm polystyrene beads as an additional pore former. The performance of cathode materials was investigated by electrochemical impedance spectroscopy as a function of electrode morphology, oxygen partial pressure, potential, and temperature. The polarization resistance of the more porous electrodes was lower than those electrodes prepared without additional pore former in the whole potential range at 800°C, slightly lower at 700°C and 600°C. The addition of yttrium iron cobaltite decreased the performance of both types of cathodes. The lower polarization resistance of porous cathodes is due to the facilitated gas diffusion through their structure.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 3; 1217-1221
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-8 z 8

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