Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "Impact crater" wg kryterium: Temat

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-13 z 13
    Tytuł:
    Struktura Pełczy – jeszcze jeden impakt z granicy K/T
    The Povtcha structure – one more K-T boundary impact crater
    Autorzy:
    Paszkowski, Mariusz
    Czajka, Wiesław
    Powiązania:
    https://bibliotekanauki.pl/articles/1032685.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Meteorytowe
    Tematy:
    Volhynia
    impact crater
    shocked rocks
    Opis:
    The shocked cherts and shattered marble breccia had been found in Povtcha, Volhynia, Ukraine in 2005 by Mariusz Paszkowski. The circular structure 10 km in diameter was identified using carthographic methods by authors. Probably, this is an impact crater. The age of the structure was determined to K-T boundary after analysing a sequence of Cretaceous and Tertiary beds.
    Źródło:
    Acta Societatis Metheoriticae Polonorum; 2009, 1; 122
    2080-5497
    Pojawia się w:
    Acta Societatis Metheoriticae Polonorum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Imilchil meteorite strewn field and Isli-Agoudal craters
    Autorzy:
    Nachit, H.
    Ibhi, A.
    Vaccaro, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/411597.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Meteorite
    strewn field
    Isli
    Agoudal
    Impact crater
    Morocco
    Opis:
    New meteorite prospections at different places in the region of Imilchil showed that (1) besides the Ataxite of Tasraft all the other collected specimens belong to the same and only IIAB iron mother meteorite (2) the strewn field of the meteorite has a length of about 38 km into north-south direction (3) the small crater of Agoudal as well as the impact crater of Isli are situated on a parallel north-south axis, if not put together with the strewn field of the Imilchil meteorite (4) these two structures might be the result of the fall of the same and only mother meteorite of the IIAB type.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 11; 65-71
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Meteoryty, kratery uderzeniowe i inne ślady kosmicznej katastrofy w rejonie Moraska pod Poznaniem
    Meteorites, impact craters, and other traces of a cosmic disaster at Morasko near Poznań
    Autorzy:
    Szczuciński, Witold
    Muszyński, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/2076071.pdf
    Data publikacji:
    2020
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    krater uderzeniowy
    meteoryt
    depozyty wyrzucane
    Holocen
    Polska
    impact crater
    meteorite
    ejecta deposits
    Holocene
    Polska
    Opis:
    About 5,000 years ago near Morasko (the district of the present-day city of Poznań, western Poland) the largest known iron meteorite shower in Central Europe took place. The evidence of that impact, documented so far, comprises numerous iron meteorite fragments distributed over an area of approximately 3 km2 and at least six meteorite impact craters with a maximum diameter of about 100 m. The present paper reviews the most recent findings related to the meteorite, craters, processes of their formation, as well as the environmental effects of the impact in the Morasko area. The most important findings, reported in this review cover: 1) the recognition of two new minerals in the meteorite: moraskoite and czochralskiite; 2) the identification and detailed analysis of the ejecta layer around the craters and underlying paleosoil providing evidence for the mid-Holocene age of the impact; 3) the numerical modelling constraining the range of likely physical properties of the impactor, e.g. the diameter of the projectile forming the largest crater and its landing velocity (c. 1.5 m and 10km/s, respectively);4) the studies of the nearby lake and peat deposits revealing restricted environmental effects of the impact. The Morasko craters field is currently one of the best-studied examples of small/moderate-sized meteorite impact in unconsolidated sediments.
    Źródło:
    Przegląd Geologiczny; 2020, 68, 8; 637--644
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Alvarez impact theory of mass extinction; limits to its applicability and the "great expectations syndrome"
    Autorzy:
    Racki, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/20155.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Alvarez impact theory
    mass extinction
    great expectation syndrome
    bolide impact
    extraterrestrial marker
    impact crater
    Cretaceous
    Paleogene
    Triassic
    Jurassic
    Frasnian
    Famennian
    boundary
    Opis:
    For the past three decades, the Alvarez impact theory of mass extinction, causally related to catastrophic meteorite impacts, has been recurrently applied to multiple extinction boundaries. However, these multidisciplinary research efforts across the globe have been largely unsuccessful to date, with one outstanding exception: the Cretaceous–Paleogene boundary. The unicausal impact scenario as a leading explanation, when applied to the complex fossil record, has resulted in force−fitting of data and interpretations (“great expectations syndrome”). The misunderstandings can be grouped at three successive levels of the testing process, and involve the unreflective application of the impact paradigm: (i) factual misidentification, i.e., an erroneous or indefinite recognition of the extraterrestrial record in sedimentological, physical and geochemical contexts, (ii) correlative misinterpretation of the adequately documented impact signals due to their incorrect dating, and (iii) causal overestimation when the proved impact characteristics are doubtful as a sufficient trigger of a contemporaneous global cosmic catastrophe. Examples of uncritical belief in the simple cause−effect scenario for the Frasnian–Famennian, Permian–Triassic, and Triassic–Jurassic (and the Eifelian–Givetian and Paleocene–Eocene as well) global events include mostly item−1 pitfalls (factual misidentification), with Ir enrichments and shocked minerals frequently misidentified. Therefore, these mass extinctions are still at the first test level, and only the F–F extinction is potentially seen in the context of item−2, the interpretative step, because of the possible causative link with the Siljan Ring crater (53 km in diameter). The erratically recognized cratering signature is often marked by large timing and size uncertainties, and item−3, the advanced causal inference, is in fact limited to clustered impacts that clearly predate major mass extinctions. The multi−impact lag−time pattern is particularly clear in the Late Triassic, when the largest (100 km diameter) Manicouagan crater was possibly concurrent with the end−Carnian extinction (or with the late Norian tetrapod turnover on an alternative time scale). The relatively small crater sizes and cratonic (crystalline rock basement) setting of these two craters further suggest the strongly insufficient extraterrestrial trigger of worldwide environmental traumas. However, to discuss the kill potential of impact events in a more robust fashion, their location and timing, vulnerability factors, especially target geology and palaeogeography in the context of associated climate−active volatile fluxes, should to be rigorously assessed. The current lack of conclusive impact evidence synchronous with most mass extinctions may still be somewhat misleading due to the predicted large set of undiscovered craters, particularly in light of the obscured record of oceanic impact events.
    Źródło:
    Acta Palaeontologica Polonica; 2012, 57, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Powstawanie kraterów impaktowych i ich rodzaje
    Formation of impact craters and their types
    Autorzy:
    Brachaniec, Tomasz
    Tymiński, Zbigniew
    Broszkiewicz, Adam
    Powiązania:
    https://bibliotekanauki.pl/articles/1033001.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Meteorytowe
    Tematy:
    complex crater
    impact
    meteorites
    meteoritica
    multi-ringed crater
    simple crater
    Opis:
    Craters form after meteoroid or asteroid impact son celestial bodies surface are created during three different periods: contact/compression, excavation and modification stage. Depending on its size the craters can be divided into three main types: simple, complex and multi-ring craters. The enormous energy released during the impact forms evident records in basis as shatter cones or breccias and affect the surrounding rock (visible only in micro scale) by shock metamorphism, which has no equivalent in the Earth’s geological processes.
    Źródło:
    Acta Societatis Metheoriticae Polonorum; 2014, 5; 30-46
    2080-5497
    Pojawia się w:
    Acta Societatis Metheoriticae Polonorum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Batymetria jezior meteorytowych w rezerwacie „Meteoryt Morasko”
    Bathymetry of crater lakes in the “Meteoryt Morasko” reserve
    Autorzy:
    Choiński, Adam
    Ptak, Mariusz
    Powiązania:
    https://bibliotekanauki.pl/articles/1033077.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Meteorytowe
    Tematy:
    Morasko
    crater
    impact
    lakes
    meteorite
    Opis:
    The paper presents results of bathymetric measurements performed on three crater lakes located in the “Meteoryt Morasko” reserve in west Poland. The maximum depth of the largest of the analysed lakes (1695 m2) was determined to amount to 2.6 m. The parameters of the lake (surface area, depth, etc.) are largely determined by a ditch dug through the crater in the north-western part of the lake, affecting the maximum water volume accumulated in the lake.
    Źródło:
    Acta Societatis Metheoriticae Polonorum; 2017, 8; 23-29
    2080-5497
    Pojawia się w:
    Acta Societatis Metheoriticae Polonorum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wykorzystanie danych Numerycznego Modelu Terenu do poszukiwania i wstępnej identyfikacji struktur impaktowych
    Use of the digital elevation models (DEM) as a tool for searching and preliminary identification of impact structures
    Autorzy:
    Walesiak, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/1033155.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Meteorytowe
    Tematy:
    cardioid pattern
    crater field
    impact structures
    morphometry
    oblique
    Opis:
    Is it possible that in Poland, instead of Morasko and still unconfirmed structures Porzadzie, Jaszczulty and Ochudno, may exist some other impact craters? To answer this question, investigations were performed, which were based on the digital elevation models. There are plenty of cavities, having different origin (e.g. a result of past glaciations, human activities or the Second World War), where some criteria may be applied, which could help to distinguish one from another. The main assumption was that during oblique impact (low angle in relation to the surface) there may develop special type of craters having cardioid (heart-shaped) ejecta pattern (as well as shape of cavity), with axis of symmetry parallel to the initial trajectory. Such structures were observed many times during experiments as well as can be easily found on other celestial bodies. Having preserved rims, even if they are much shallower than typical craters (because of secondary changes), such cavities are perfect candidates to be suspected of the impact origin. As a result of research between 2015 and 2017 there were discovered 3 locations (instead of Ochudno) with heart-shaped structures, which may represent combined effect of ejection angles, velocities and directions, known from experiments and confirmed craters. In all cases there are noticeable rims. The largest “spoon-like” structure, discovered near the Rowista village, is almost perfect copy of a very unusual elongated crater located north of the Acheron Fossae on Mars.
    Źródło:
    Acta Societatis Metheoriticae Polonorum; 2020, 11; 110-124
    2080-5497
    Pojawia się w:
    Acta Societatis Metheoriticae Polonorum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dalsze badanie struktur w okolicach Wyszkowa – wyniki prac terenowych
    Further investigation of structures near Wyszkow – field research results
    Autorzy:
    Walesiak, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/1033139.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Meteorytowe
    Tematy:
    crater
    impact
    oblique
    planar deformation features
    shatter cones
    shocked quartz
    Opis:
    There are specified criteria used to verify if some geological structure was developed during hypervelocity impact. Some of them are related to the passage of a shock wave through rocks, so are considered as definitive. Porządzie, Jaszczulty & Ochudno are structures discovered in 2014 (based on LiDAR data). They have many features suggesting possible impact origin. In shape of Porządzie there can be even recognized possible traces of shock waves, similar to those present during hypersonic flow (similar to observed e.g. in an airburst shape of extraordinary bright meteors). Unfortunately, this kind of observations (morphometry) on Earth is still considered as not enough to confirm the crater. The aim of recent study was to search for additional traces, which may help to prove that mentioned structures were created during common oblique impact event. Initially there were chosen 3 locations for outcrops, but finally samples were collected from 6 smaller pits. In Porzadzie structure there were discovered cemented rocks with various shape and size (concretions or lithic, parautochtonous breccias) and 2 rocks with possibly shocked quartz, having basal sets of thin and straight lamellae. On once surface there were recognized hierarchal branched (including spoon-like) structures resembling shatter cones. In uprange, at depth of about 50–70 cm, soil was rich in small charcoal pieces (like in other relatively small craters: e.g. Campo del Cielo, Whitecourt, Kaali, Ilumetsa, Morasko). All these observations, taken together with previous results, are about to confirm impact origin of Porzadzie crater.
    Źródło:
    Acta Societatis Metheoriticae Polonorum; 2019, 10; 168-192
    2080-5497
    Pojawia się w:
    Acta Societatis Metheoriticae Polonorum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impakty Ries-Steinheim. Wzorzec rozrzutu mołdawitów
    Ries-Steinheim impacts. Model of moldavites strewnfield
    Autorzy:
    Brachaniec, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/767292.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Meteorytowe
    Tematy:
    Ries
    Steinheim
    crater
    ejecta deposits
    impact
    meteorites
    moldavites
    strewnfield
    tektites
    Opis:
    In the 1960s demonstrated that the Ries-Steinheim craters, located in the south of Germany and tektites types moldavites are the same age. Ries crater strewnfield covers eastern Germany, the Czech Republic and northern Austria. A few old scientific studies have not given a clear answer about model creation and the actual size of moldavite strewnfield. For this reason 11 years ago created a model that was to clarify these issues.
    Źródło:
    Acta Societatis Metheoriticae Polonorum; 2013, 4; 22-27
    2080-5497
    Pojawia się w:
    Acta Societatis Metheoriticae Polonorum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Charakterystyka petrograficzna skał pochodzących ze struktury impaktowej Gardnos, Norwegia
    Petrographic charctersitics of the rocks from the impact structure Gardnos, Norway
    Autorzy:
    Jarmołowicz-Szulc, K.
    Ilcewicz-Stefaniuk, D.
    Stefaniuk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2061826.pdf
    Data publikacji:
    2015
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    meteoryt
    krater
    brekcja impaktowa
    suevit
    Gardnos
    meteorite
    crater
    impact breccia
    suevite
    Opis:
    Krater meteorytu Gardnos znajduje się w Norwegii, ok. 125 km na północny zachód od Oslo. Cała struktura jest dobrze widoczna w terenie dzięki licznym odkrywkom brekcji impaktowych i utworów poimpaktowych występujących w okręgu o promieniu ok. 5 km. Główne typy skał impaktowych w rejonie krateru Gardnos to autochtoniczna brekcja z Gardnos oraz przykrywająca ją allochtoniczna brekcja impaktowa (suevit). W artykule omówiono petrografię tych skał. Brekcja z Gardnos jest brekcją lityczną, złożoną ze spękanych fragmentów skał, ale nie zawiera fragmentów stopu. Suevit jest brekcją polimiktyczną, zawierającą małe fragmenty zrekrystalizowanego stopu z klastami skał i minerałów.
    The crater of the Gardnos meteorite is located in Norway, about 125 km north-west of Oslo. The structure is well seen due to the outcrops of impact breccias and post-impact deposits that form a circle with a radius of about 5 km. Main types of the impact rocks in the Gardnos area are the autochthonous Gardnos breccia and its cover – allochthonous suevite breccia. The petrological characteristics of these rocks are presented. The Gardnos breccia is a lithic breccia, composed of fissured rock fragments, without melt components. The suevite is a polymictic breccia, built of small fragments composed of recrystallized melt and clasts of rocks and minerals.
    Źródło:
    Biuletyn Państwowego Instytutu Geologicznego; 2015, 464; 43--48
    0867-6143
    Pojawia się w:
    Biuletyn Państwowego Instytutu Geologicznego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Znaczenie ekonomiczne kraterów meteorytowych
    Economic importance of meteorite craters
    Autorzy:
    Telecka, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2075142.pdf
    Data publikacji:
    2014
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    crater deposits
    impact structures
    economic geology
    krater
    struktury impaktowe
    geologia gospodarcza
    Opis:
    Commercial deposits in impact structures are world-class range resources. They contain the most important resources of copper, nickel, uranium, gold, platinum group elements and hydrocarbons. Terrestrial craters are also sources of mineral waters and building materials, and they can be reservoirs of hydropower. There are three types of deposits in meteorite craters: progenetic – originate before impact, syngenetic – originate during impact, and epigenetic – result from postimpact processes. The estimated number of Earth’s craters suggests that impact structures can be potentially good sources of economic deposits and tourism resources.
    Źródło:
    Przegląd Geologiczny; 2014, 62, 5; 240--244
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kratery Morasko – obrona hipotezy ukośnego impaktu w kontekście dostępnej wiedzy i wyników badań
    Morasko craters – in defense of oblique impact origin based on knowledge and research
    Autorzy:
    Walesiak, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/1830330.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Meteorytowe
    Tematy:
    bilateral symmetry
    crater field
    elliptical craters
    forbidden zone
    meteorite Morasko
    oblique impact
    Opis:
    Over 2 years ago there was published an article (Bronikowska 2018a) challenging some results of research related to Morasko meteorite fall. Those results are huge problem for scientists who are not able to explain them using simplified models and maybe do not want to admit that some assumptions should be verified and redefined. One of hypothesis discussed in the paper was article manifesting that Morasko craters were created during oblique impact (Walesiak 2017) and that initial trajectory can be estimated by elongation of almost all cavities, their bilateral symmetries according to longer axis and observed asymmetries of rims. By comparison to Campo del Cielo craters Walesiak suggested that impact angle could be very shallow (10–20°), as ellipticity of all smaller Morasko structures is approx. 1,3. Further analysis of topography in neighborhood of Morasko revealed that there may exist more impact craters around this area, which may explain discovery of two iron meteorites near Oborniki village (17 km NW from Meteorite Morasko Restricted Area), unfortunately lost during World War II. In fact, Bronikowska confused definitions “oblique impact” and “elliptical craters”, what can be supported by given references (Elbeshausen et al. 2009) confirming Walesiak hypothesis. Unfortunately, this misunderstanding touches also another article of this author (Bronikowska et al. 2017), where obliquity was neglected. However, estimated during that modeling pre-impact angle (30–43°), according to known definitions written in many publications, should be classified as oblique impact. All elongated craters, as well as morphology of the largest structure in Meteorite Morasko Restricted Area suggest impact from NW while during reconstruction of meteoroid parameters Bronikowska assumed impactor coming from NE (based on existing strewn field). Considering not clear relation between meteorites and craters (e.g., lack of findings in cavities, relatively poor number of shrapnel fragments around structures and possibility that craters may be much older than fall of meteorites), it may be not enough reliable justification. Even if relation exists, example of Whitecourt (with distribution of meteorites downrange), compared with abundance of Morasko shrapnel fragments collected hundreds of meters NE from Restricted Area, undermines parameter used in modelling. Also, single fragmentation is doubtful, concluded after unreasonable omitting known craters outside Restricted Area (e.g., crater no 8 described by Pokrzywnicki (1964) and structure no 9 mentioned by Hodge (1994)). Finally, use of iSALE-2D shock physics code (valid for vertical impacts only) for modelling of elliptical craters formed during highly oblique impact (angle lower than 12°), even considering vertical component (which approximation is only applicable for impact into materials with a friction coefficient of about f=0,7 with no or very little cohesion) (Elbeshausen et al. 2009), also should not be considered as proper applied method leading to get valuable results. In this article there is proposed new strewn field definition for Morasko meteorite, based on elongation of all known and unconfirmed (yet) craters. Surprisingly, estimated (redefined) pre-impact trajectory gives convincing explanation for bilaterally symmetrical distribution of documented findings.
    Źródło:
    Acta Societatis Metheoriticae Polonorum; 2021, 12; 108-128
    2080-5497
    Pojawia się w:
    Acta Societatis Metheoriticae Polonorum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influence of the Multilayer Structure of Hard Coatings on their Resistance to Micro-Impact Fatigue Wear
    Wpływ wielowarstwowej budowy twardych powłok na ich odporność na mikroudarowe zużycie zmęczeniowe
    Autorzy:
    Krupa, Jolanta
    Wiązania, Grzegorz
    Zimowski, Sławomir
    Kot, Marcin
    Powiązania:
    https://bibliotekanauki.pl/articles/971560.pdf
    Data publikacji:
    2020
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    hard coating
    micro-impact
    fatigue wear
    crater evolution
    twarda powłoka
    mikroudar
    zużycie zmęczeniowe
    ewolucja krateru
    Opis:
    Fatigue cracking of thin hard anti-wear coatings occurs, among others, in the tribological contact of sliding friction pairs, in the top layers of cutting tools coatings, as well as in the surface of elements subjected to erosion processes. Coating fatigue wear is initiated as a result of cyclic interactions with micro-roughness of counterpart or other elements or particles that repeatedly impact the surface. The selection of appropriate coatings can increase the durability of machine components that are subjected to fatigue impact loads. The paper presents the results of tests on micro-impact fatigue wear of elements covered with single TiN and DLC coatings, as well as multi-layer (Ti/TiN)×8 type. Fatigue tests were carried out using the micro-impact method by cyclic impact of the surface of the coating with a diamond ball. The experiments were performed using a special laboratory stand. The correlation between fatigue life of coatings and their micromechanical properties such as Young's modulus and hardness were also examined. The hardness and Young's modulus were determined by an instrumented indentation method. The test results proved that the (Ti/TiN)×8 multilayer coating demonstrates wear 1.4 times smaller than the sample with the TiN coating and 1.2 than the sample with the DLC coating.
    Pękanie zmęczeniowe cienkich twardych powłok przeciwzużyciowych występuje m.in. w styku tribologicznym ślizgowych węzłów tarcia, w warstwach wierzchnich pokryć narzędzi skrawających, a także w powierzchni elementów poddanych procesom erozyjnym. Zużycie zmęczeniowe powłok inicjowane jest na skutek cyklicznych interakcji z mikronierównościami przeciwelementu lub innymi elementami bądź cząstkami, które wielokrotnie uderzają w powierzchnie. Dobór odpowiednich powłok może zwiększyć trwałość elementów maszyn, które poddane są obciążeniu udarowemu o charakterze zmęczeniowym. W pracy przedstawiono wyniki badań odporności na mikroudarowe zużycie zmęczeniowe elementów pokrytych powłokami pojedynczymi TiN oraz DLC, a także wielowarstwowymi typu (Ti/TiN)×8. Testy zmęczeniowe przeprowadzono metodą mikroudarową poprzez cykliczne uderzanie w powierzchnię powłoki kulą ceramiczną. Eksperymenty wykonano przy zastosowaniu specjalnego stanowiska pomiarowego. Zbadano również występowanie korelacji pomiędzy trwałością zmęczeniową powłok i ich właściwościami mikromechnicznymi takimi jak moduł Younga oraz twardość, które wyznaczono statyczną metodą wciskania wgłębnika. Wyniki badań dowiodły, że wielowarstwowa powłoka (Ti/TiN)×8 wykazuje zużycie 1,4 razy mniejsze od próbki z powłoką TiN oraz blisko 1,2 od tej z powłoką DLC.
    Źródło:
    Tribologia; 2020, 290, 2; 37-45
    0208-7774
    Pojawia się w:
    Tribologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-13 z 13

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies