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    Wyświetlanie 1-15 z 15
    Tytuł:
    Nanocrystalline CVD Diamond Coatings on Fused Silica Optical Fibres: Optical Properties Study
    Autorzy:
    Ficek, M.
    Bogdanowicz, R.
    Ryl, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402648.pdf
    Data publikacji:
    2015-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.15.Gh
    81.05.ug
    82.80.Gk
    68.55.A-
    78.66.Qn
    Opis:
    Seeding and growth processes of thin diamond films on fused silica optical fibres have been investigated. Glass pre-treatment by dip coating in two detonation nanodiamond (DND) seeding media has been studied. The DND suspension in ethyl alcohol and dispersion of DND in dimethyl sulfoxide (DMSO) with polyvinyl alcohol (PVA) were chosen for the seeding purpose. The grain size distribution of nanodiamond particles in both seeding media was kept at the same level (approximately 10-50 nm). After the seeding nanocrystalline diamond films were deposited on the fibres using microwave plasma assisted chemical vapour deposition system. The results of the process were investigated using numerical analysis of scanning electron microscopy images. The molecular structure of diamond has been examined with micro-Raman spectroscopy. Thickness, roughness and optical properties of the nanocrystalline diamond films in VIS-NIR wavelength range were investigated on reference samples using spectroscopic ellipsometry. Light reflection at the fibre end-face for different deposition parameters was also investigated. Proposed seeding method can be further effectively applied for manufacturing of optical fibre sensors. Due to extraordinary properties of diamond, which include high chemical and mechanical resistance, such films are highly desired for optical sensing purposes.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 3; 868-873
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Capacity of Fractographic Analysis for Load-Time History Reconstruction and Fatigue Crack Growth Rate Estimation for the 2024-T3 Aluminium Alloy
    Autorzy:
    Bogdanowicz, Z.
    Kocańda, D.
    Torzewski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/97833.pdf
    Data publikacji:
    2009
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
    Opis:
    The subject of the paper is the considerations for the feasibility of load time history reconstruction on the basis of microfracture analysis for a failed component made of 2024-T3 aluminium alloy that operates under variable amplitude loading. For this goal three different variable amplitude load sequences with single and multiple overloads and underloads were applied to investigate crack growth rate and to examine the images of fatigue striations on the fracture surface of a component. These loads are employed when simulating the fatigue crack behaviour in aeronautical alloys. Microfracture analysis was also used either for learning the interaction of variable amplitude loading for crack growth rate in 2024-T3 alloy or for establishing the relation between surface crack and crack depth growth.
    Źródło:
    Fatigue of Aircraft Structures; 2009, 1; 20-36
    2081-7738
    2300-7591
    Pojawia się w:
    Fatigue of Aircraft Structures
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mould walls inclination and dendritic morphology of CMSX-4 blades airfoils
    Autorzy:
    Krawczyk, J.
    Bogdanowicz, W.
    Sieniawski, J.
    Kubiak, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1075667.pdf
    Data publikacji:
    2016-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    68.70.+w
    61.66.Dk
    61.72.Bb
    Opis:
    The airfoils of single-crystalline turbine blades were studied. The blades made of industrial CMSX-4 superalloy were obtained by the Bridgman technique. Five different withdrawal rates (1-5 mm/min) were used. Series of as-cast samples were prepared by cutting the airfoils at different distances from the blade root. The metallographic sections, prepared for each cutting planes, were subjected to scanning electron microscopy observations and Laue diffraction studies. Macrostructure images of whole area of airfoil cross-sections were obtained by stitching several obtained SEM images. Morphology of dendrites in different area of cross-sections were analysed. The crystal orientation of each sample were determined by analysis of Laue pattern. It was found that the morphology of dendrites changes in the area, where the dendrite growth is limited by inclined mould walls.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 4; 1100-1103
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dendrite growth in selector-root area of single crystal CMSX-4 turbine blades
    Autorzy:
    Bogdanowicz, W.
    Tondos, A.
    Krawczyk, J.
    Albrecht, R.
    Sieniawski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1058103.pdf
    Data publikacji:
    2016-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.66.Dk
    61.72.-y
    61.10.Nz
    Opis:
    The single crystal turbine blades made of CMSX-4 nickel-based superalloy were studied. The turbine blades were obtained by the Bridgman technique with withdrawal rate of 5 mm/min. The samples, cut-off from root part of blades and containing the fragment of the selector, were studied. The effect of selector geometry on the dendrites growth and defects formation in the selector-root area of the blade were analyzed. The Laue diffraction, scanning electron microscopy, and X-ray diffraction topography were applied. It was found that, during crystallization of the selector, the dendrite cores, after reaching the surface of mould, may bend, if the angle between dendrite cores and the mould surface was equal to 12°. When the angle was equal to 24° the growth of dendrites has been stopped. It can be stated that the defects, which appeared in the selector were inherited by the root part.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 4; 1107-1109
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterization of casting defects in the single crystal turbine blade airfoil
    Autorzy:
    Albrecht, R.
    Bogdanowicz, W.
    Sieniawski, J.
    Kubiak, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1075923.pdf
    Data publikacji:
    2016-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.72.Ff
    61.72.-y
    61.66.Dk
    Opis:
    In the paper turbine blades made from single crystal CMSX-4 superalloy were investigated by X-ray diffraction methods (topography, Ω-scan mapping) complemented by scanning electron microscopy observations. By the X-ray diffraction topography method several misorientation defects were visualized as well as dendrites arrangement. It was discussed that tip of the airfoil and thin walled area of the turbine blades located near the trailing edge can accumulate more growth defects than other airfoil part, due to the complex shape of the mould.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 4; 1091-1093
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Crystal perfection studies of single crystal superalloy turbine blades by X-ray diffraction methods
    Autorzy:
    Gancarczyk, K.
    Albrecht, R.
    Bogdanowicz, W.
    Sieniawski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1112679.pdf
    Data publikacji:
    2016-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.66.Dk
    61.05.cp
    Opis:
    In the paper the crystal structure of single crystal CMSX-4 blade casts, applied in high pressure turbine of aircraft engines was analyzed. The longitudinal section of blade, cast at withdrawal rate of 3 mm/min was used as a sample. During the conducted research, following X-ray diffraction methods were applied: EFG Ω-scan, Auleytner X-ray topography and analysis of diffraction reflex profile ("rocking curve"). The authors determined crystal orientation in entire blade casts on the basis of set criterion concerning values of angle α - deviation of [001] direction from the direction of cast withdrawal. Conclusions concerning the crystal structure quality of the blade were drawn based on results from three different research methods. Local changes in crystal orientation on the surface of blade cast, also areas with significant structure defect degree and the presence of internal stresses were characterized.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 4; 1088-1090
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Surface Decorations of Al-Cu-Fe and Al-Cu-Co Single Quasicrystals
    Autorzy:
    Surowiec, M.
    Bogdanowicz, W.
    Krawczyk, J.
    Sozańska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1373609.pdf
    Data publikacji:
    2014-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.44.Br
    Opis:
    We studied surface decorations of faceted icosahedral Al-Cu-Fe and decagonal Al-Cu-Co single quasicrystals by the scanning electron microscopy using primary and secondary electrons. Both types of single quasicrystals exhibited decorations on their facets, however the character of the decorations was totally different. Three kinds of decorations has been developed. On icosahedral $Al_{60}Cu_{26}Fe_{14}$ quasicrystals we found three kinds of decorations: cellular, cavity type and fractal-like. There was no evident difference in chemical composition between the inner dodecahedra and the decorations of all types. Surface decorations found on decagonal $Al_{73.5}Cu_{17.5}Co_9$ quasicrystals formed a kind of irregular dendritic stars on the separate bright islands.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 2; 597-598
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermophysical properties of 904L austenitic steel
    Właściwości cieplnofizyczne stali austenitycznej 904L
    Autorzy:
    Nasiłowska, B.
    Bogdanowicz, Z.
    Terpiłowski, J.
    Pańcikiewicz, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/264079.pdf
    Data publikacji:
    2018
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    thermophysical properties
    steel 904L
    specific heat
    thermal diffusivity
    thermal conductivity
    właściwości cieplno-fizyczne
    stal 904L
    ciepło właściwe
    dyfuzyjność cieplna
    przewodność cieplna
    Opis:
    This paper presents the results of the structural investigations and thermophysical properties of 904L steel parent material. Experimental studies on the structure of 904L steel proved a pure austenitic structure. Both the experimental research and analysis of the thermophysical properties of 904L steel were complemented with the results of the thermal conductivity calculations for the tested material. The paper presents a brief description of the measurements, the procedures for evaluating the data, and a set of the obtained results.
    W pracy przedstawiono wyniki badań strukturalnych i właściwości cieplnofizyczne materiału rodzimego stali 904L. Badania eksperymentalne struktury stali 904L wykazały strukturę czysto austenityczną. Badania doświadczalne i analizę właściwości cieplnofizycznych stali 904L uzupełniono wynikami obliczeń przewodności cieplnej badanego materiału. W pracy przedstawiono zwięzły opis wykonywanych pomiarów, charakterystykę procedur opracowania danych oraz komplet uzyskanych wyników.
    Źródło:
    Metallurgy and Foundry Engineering; 2018, 44, 2; 61-71
    1230-2325
    2300-8377
    Pojawia się w:
    Metallurgy and Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of CMSX-4 single-crystalline turbine blades root by electron and X-ray diffraction methods
    Autorzy:
    Krawczyk, J.
    Zubko, M.
    Bogdanowicz, W.
    Tondos, A.
    Sieniawski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1058074.pdf
    Data publikacji:
    2016-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.10.Aj
    61.72.Ff
    61.05.J-
    Opis:
    The root of single-crystalline turbine blade made of CMSX-4 superalloy were studied. The studied blade was produced by the Bridgman technique in industrial ALD furnace at withdrawal rate of 3 mm/min. The samples for investigations were cut from the blade root parallel to the withdrawal direction. Metallographic sections of longitudinal samples planes were prepared for further investigations. The samples were analysed using scanning electron microscopy and the Laue diffraction studies. The crystal orientations in macro-scale were determined by analysis of the Laue pattern and local crystal orientations were studied by electron backscattered diffraction technique. Morphology of dendrites were examined by analysis of scanning electron microscopy macro-images. Study of subgrain structure was performed by X-ray diffraction topography. The sharp parallel contrast bands, visible on the X-ray topograms, were related with dendrite cores, arranged with the same direction. Additionally, the low angle boundaries were formed in certain samples, visible on the topograms as contrast shifts. Step changes of local crystal orientation in certain areas were observed on the electron backscattered diffraction maps. The electron backscattered diffraction crystal orientation maps were related to the misorientation visualized in topograms.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 4; 1104-1106
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Carex secalina [Cyperaceae], a critically endangered species of Europe: historic and new localities in Poland
    Autorzy:
    Lembicz, M
    Bogdanowicz, A.M.
    Chmiel, J.
    Zukowski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/58491.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    endangered species
    Polska
    new locality
    active protection
    plant protection
    monitoring
    species composition
    Carex secalina
    locality
    Cyperaceae
    halophyte
    population size
    Opis:
    Carex secalina, a species recognized as extinct in Poland for 40 years, was re-discovered in 2000 and it’s natural populations covered by monitoring. From among nine historic localities, only for two - Jacewo and Turzany, in the vicinity of Inowrocław - the occurrence of the species was confirmed. In the course of the field studies, six new localities, not previously recorded in literature, were discovered. The sedge occupies sub-halophytic habitats in which it occurs along with halophytic species (particularly, such as Glaux maritima and Pucinellia distans) and a group of ruderal taxons. One of the newly discovered localities of C. secalina comprises an anthropogenic habitat. On the whole, the population sizes ranged from 20 to 350 individuals. The studies revealed a positive correlation between the size of a population and cattle pasturing, i.e. C. secalina forms the largest populations in the habitats remaining under the intense pressure of grazing and treading. Moreover, it was found that the high generative reproduction rate compensates the damage caused by animal grazing. The results suggest that an active protection of the sedge populations through the agricultural use of its habitats is the only effective way of securing it’s further occurrence in Poland, while including the sub-halophytic pastures with C. secalina in the agricultural and environmental program should be a priority task in the nearest future.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2009, 78, 4; 311-320
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of creep on crystallographic orientation in single crystal superalloy
    Autorzy:
    Albrecht, R.
    Rak, J.
    Bogdanowicz, W.
    Gancarczyk, K.
    Sieniawski, J.
    Kubiak, K.
    Lelątko, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1075665.pdf
    Data publikacji:
    2016-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.72.Ff
    81.10.Aj
    61.72.Hh
    Opis:
    The creep-rupture tests were performed on a single crystal rods made of CMSX-4 superalloy obtained at withdrawal rates of 3 and 5 mm/min. After the rupture the microstructure and fracture surface were examined and correlated with X-ray crystal rotation measurements by the Ω-scan method. The conclusions about the crystal lattice rotation during creep test were provided.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 4; 1094-1096
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Candida glabrata as an aetiological factor of the fulminant course of panophthalmitis
    Autorzy:
    Bilska-Stokłosa, J.
    Hampelska, K.
    Osmola, K.
    Czajka, J.
    Bogdanowicz-Gapińska, D.
    Tomczak, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/28762969.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Medycyny Wsi
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2020, 27, 4; 540-543
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Carex secalina [Cyperaceae], a species critically endangered in Europe: from propagule germination to propagule production
    Autorzy:
    Zukowski, W
    Lembicz, M.
    Olejniczak, P.
    Bogdanowicz, A.
    Chmiel, J.
    Rogowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/57902.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    abundance
    endangered species
    fertility
    seedling
    Cyperaceae
    Carex secalina
    first reproduction
    Europe
    halophyte
    field
    age
    germination
    Opis:
    The size and reproduction ability of the three field populations of Carex secalina Willd. ex Wahlenb. have been assessed. In the parallel garden study selected traits from the life history of the species have been studied, such as age at first reproduction, fertility, the size of seeds, their germination ability and size of seedlings. The populations of C. secalina discovered in Poland in 2000 are characterised by small abundance and small area. All individuals from the three populations in the garden produced generative shoots in the third year of life. Statistically significant differences between the populations were found in the production of shoots with unisexual spikes and bisexual ones, the latter had not been reported in the hitherto literature on the species. The seeds started germinating after a 6-months rest. The first seedlings were observed in the first decade of May. The largest seedlings were noted in the population producing the smallest seeds. The results contribute to explaining the renewal of the populations of this species in the field.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2005, 74, 2
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-15 z 15

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