Autor: Fiedorowicz, Henryk - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The effect of EUV modification of WC-Co indexable knives on the tool life during particleboard milling
Autorzy:: Wilkowski, Jacek
Barlak, Marek
Fiedorowicz, Henryk
Bartnik, Andrzej
Werner, Zbigniew
Powiązania:: https://bibliotekanauki.pl/articles/2200221.pdf
Data publikacji:: 2020
Wydawca:: Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:: WC-Co indexable knives
EUV modification
tool life
particleboard
milling
Opis:: The effect of EUV modification of WC-Co indexable knives on the tool life during particleboard milling. The paper presents the results of lifetime tests of WC-Co composite blades after modification of their flank surfaces using intense pulses of extreme ultraviolet (EUV). Wear tests consisting in milling a three-layer particleboard with constant cutting parameters were carried out on a CNC machining center. A statistically insignificant increase in the lifetime of modified tools was demonstrated, as well as an inversely proportional relationship with the duration of the EUV pulses. The EUV modification increased the coefficient of variation in the lifetime of WC-Co indexable knives.
Wpływ modyfikacji EUV noży wymiennych WC-Co na ich trwałość podczas frezowania płyty wiórowej. W artykule przedstawiono wyniki badań trwałościowych ostrzy z kompozytu WC-Co po modyfikacji ich powierzchni przyłożenia przy użyciu intensywnych impulsów promieniowania ultrafioletowego (EUV). Testy zużyciowe przeprowadzono na centrum obróbczym CNC podczas frezowania trójwarstwowej płyty wiórowej przy stałych parametrach skrawania. Wykazano nieistotny statystycznie przyrost trwałości ostrzy modyfikowanych, a także odwrotnie proporcjonalną zależność od czasu trwania impulsu EUV. Modyfikacja EUV zwiększała współczynnik zmienności trwałości ostrzy WC-Co.
Źródło:: Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2020, 109; 58--63
1898-5912
Pojawia się w:: Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Wideband spectral emission measurements from laser-produced plasma EUV/SXR source based on a double gas puff target
Autorzy:: Arikkatt, Antony Jose
Wachulak, Przemysław
Fiedorowicz, Henryk
Bartnik, Andrzej
Czwartos, Joanna
Powiązania:: https://bibliotekanauki.pl/articles/1849155.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Plasma Spectroscopy
X-ray coherence tomography
soft X-ray
Opis:: We present spectral emission characteristics from laser-plasma EUV/SXR sources produced by irradiation of < 1 J energy laser pulse on eleven different double stream gas puff targets, with most intense electronic transitions identified in the spectral range from 1 nm to 70 nm wavelength which corresponds to photon energy from 18 eV to 1240 eV. The spectra were obtained using grazing incidence and transmission spectrographs from laser-produced plasma emission, formed by the interaction of a laser beam with a double stream gas puff target. Laser pulses with a duration of 4 ns and energy of 650 mJ were used for the experiment. We present the results obtained from three different spectrometers in the wavelength ranges of SXR (1-5.5 nm), SXR/EUV (4-15.5 nm), and EUV (10-70 nm). In this paper, detailed information about the source, gas targets under investigation, the experimental setup, spectral measurements and the results are presented and discussed. Such data may be useful for the identification of adequate spectral emissions from gasses in the EUV and SXR wavelength ranges dedicated to various experiments (i.e. broadband emission for the X-ray coherence tomography XCT) or may be used for verification of magnetohydrodynamic plasma codes.
Źródło:: Metrology and Measurement Systems; 2020, 27, 4; 701-719
0860-8229
Pojawia się w:: Metrology and Measurement Systems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Investigation of low-temperature plasmas formed in low-density gases surrounding laser-produced plasmas
Autorzy:: Majszyk, Mateusz
Bartnik, Andrzej
Skrzeczanowski, Wojciech
Fok, Tomasz
Węgrzyński, Łukasz
Szczurek, Mirosław
Fiedorowicz, Henryk
Powiązania:: https://bibliotekanauki.pl/articles/2202566.pdf
Data publikacji:: 2023
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: extreme ultraviolet
EUV
laser plasma
low pressure
photoionization
plasma
soft X-ray
SXR
Opis:: Low-temperature plasma production is possible as a result of photoionization using high-intensity extreme ultraviolet (EUV) and soft X-ray (SXR) pulses. Plasma of this type is also present in outer space, e.g., aurora borealis. It also occurs when high-velocity objects enter the atmosphere, during which period high temperatures can be produced locally by friction. Low-temperature plasma is also formed in an ambient gas surrounding the hot laser-produced plasma (LPP). In this work, a special system has been prepared for investigation of this type of plasma. The LPP was created inside a chamber fi lled with a gas under a low pressure, of the order of 1–50 mbar, by a laser pulse (3–9 J, 1–8 ns) focused onto a gas puff target. In such a case, the SXR/EUV radiation emitted from the LPP was partially absorbed in the low-density gas. In this case, high- and low-temperature plasmas (Te ~100 eV and ~1 eV, respectively) were created locally in the chamber. Investigation of the EUV-induced plasmas was performed mainly using spectral methods in ultraviolet/visible (UV/VIS) light. The measurements were performed using an echelle spectrometer, and additionally, spatial–temporal measurements were performed using an optical streak camera. Spectral analysis was supported by the PGOPHER numerical code.
Źródło:: Nukleonika; 2023, 68, 1; 11--17
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki