TY - JOUR AU - Gubicza, Jenő AU - Kawasaki, M. AU - Dankházi, Zoltán AU - Windisch, Márk AU - El-Tahawy, Moustafa TI - X-ray line profile analysis study on the evolution of the microstructure in additively manufactured 316L steel during severe plastic deformation JF - JOURNAL OF MATERIALS SCIENCE J2 - J MATER SCI VL - 59 PY - 2024 SP - 6008 EP - 6023 PG - 16 SN - 0022-2461 DO - 10.1007/s10853-023-09030-0 UR - https://m2.mtmt.hu/api/publication/34258392 ID - 34258392 N1 - Department of Materials Physics, Eötvös Loránd University, P.O.B. 32, Budapest, 1518, Hungary School of Mechanical, Industrial and Manufacturing Engineering, Oregon State University, Corvallis, 97331, OR, United States Department of Development, Bay Zoltán Nonprofit Ltd. for Applied Research, Budapest, 1116, Hungary Physics Department, Faculty of Science, Tanta University, Tanta, 31527, Egypt Export Date: 06 November 2023; Cited By: 0; Correspondence Address: J. Gubicza; Department of Materials Physics, Eötvös Loránd University, Budapest, P.O.B. 32, 1518, Hungary; email: jeno.gubicza@ttk.elte.hu; CODEN: JMTSA LA - English DB - MTMT ER - TY - JOUR AU - Goryunov, M. V. AU - Varga, G. AU - Dankházi, Zoltán AU - Felner, I. AU - Chukin, A. V. AU - Kuzmann, Ernő AU - Homonnay, Zoltán AU - Grokhovsky, V. I. AU - Oshtrakh, M. I. TI - STUDY OF GIBEON IVA IRON METEORITE BY SCANNING ELECTRON MICROSCOPY, X-RAY DIFFRACTION, MAGNETIZATION MEASUREMENTS AND MOSSBAUER SPECTROSCOPY JF - METEORITICS & PLANETARY SCIENCE J2 - METEORIT PLANET SCI VL - 58 PY - 2023 IS - 1 SP - A108 EP - A108 PG - 1 SN - 1086-9379 UR - https://m2.mtmt.hu/api/publication/34194400 ID - 34194400 LA - English DB - MTMT ER - TY - JOUR AU - Goryunov, M. V. AU - Varga, G. AU - Dankházi, Zoltán AU - Chukin, A. V. AU - Felner, I. AU - Kuzmann, Ernő AU - Grokhovsky, V. I. AU - Homonnay, Zoltán AU - Oshtrakh, M. I. TI - Characterization of iron meteorites by scanning electron microscopy, x-ray diffraction, magnetization measurements, and Mossbauer spectroscopy: Mundrabilla IAB-ung JF - METEORITICS & PLANETARY SCIENCE J2 - METEORIT PLANET SCI VL - 58 PY - 2023 IS - 10 SP - 1552 EP - 1562 PG - 11 SN - 1086-9379 DO - 10.1111/maps.14070 UR - https://m2.mtmt.hu/api/publication/34181984 ID - 34181984 N1 - Institute of Physics and Technology, Ural Federal University, Ekaterinburg, Russian Federation Department of Materials Physics, Eötvös Loránd University, Budapest, Hungary Racah Institute of Physics, The Hebrew University, Jerusalem, Israel Laboratory of Nuclear Chemistry, Institute of Chemistry, Eötvös Loránd University, Budapest, Hungary Cited By :1 Export Date: 20 February 2024 CODEN: MPSCF Correspondence Address: Oshtrakh, M.I.; Institute of Physics and Technology, Russian Federation; email: oshtrakh@gmail.com AB - A fragment of Mundrabilla IAB-ung iron meteorite was analyzed using optical microscopy, scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), magnetization measurements, and Mossbauer spectroscopy. The polished section of meteorite fragment characterization by optical microscopy and SEM shows the presence of the gamma-Fe(Ni, Co) phase lamellae, plessite structures and schreibersite inclusions in the alpha-Fe(Ni, Co) phase. EDS indicates variations in the Ni concentrations in the following ranges: (i) similar to 6.3-6.5 atom% in the alpha-Fe(Ni, Co) phase and (ii) similar to 22 to similar to 45 atom% in the gamma-Fe(Ni, Co) phase lamellae including the range of similar to 29-33 atom% of Ni leading to the paramagnetic state of the gamma-Fe(Ni, Co) phase. Schreibersite inclusions contain similar to 23 atom% of P, similar to 33 atom% of Fe, similar to 43 atom% of Ni, and similar to 0.7 atom% of Co. Plessite structure contains the average Ni concentration of similar to 17 atom% while detailed EDS analysis shows: (i) the lowest Ni concentrations of similar to 5 to similar to 8 atom%, (ii) the intermediate Ni concentrations of similar to 9 to similar to 19 atom%, and (iii) the highest Ni concentration up similar to 38 atom% (some individual micro-grains demonstrate up to similar to 47 and similar to 59 atom% of Ni) that may indicate the presence of the (i) alpha-Fe(Ni, Co), (ii) alpha(2)-Fe(Ni, Co), and (iii) gamma-Fe(Ni, Co) phases. These may be a result of the c-phase decomposition with mechanism gamma -> alpha + alpha(2) + gamma that indicates a slow cooling rate for Mundrabilla IAB-ung iron meteorite. The presence of similar to 98.6 wt% of the alpha-Fe(Ni, Co) phase and similar to 1.4 wt% of the gamma-Fe(Ni, Co) phase is found by XRD while schreibersite is not detected. Magnetization measurements show the saturation magnetization moment of Mundrabilla IAB-ung of 188(2) emu g(-1) indicating a low average Ni concentration in Fe-Ni-Co alloy. Mossbauer spectrum of the bulk Mundrabilla powder demonstrates five magnetic sextets related to the ferromagnetic alpha(2)-Fe(Ni, Co), alpha-Fe(Ni, Co), and gamma-Fe(Ni, Co) phases and one singlet associated with the paramagnetic gamma-Fe(Ni, Co) phase, however, there are no spectral components corresponding to schreibersite. Basing on relatively larger and smaller values of the magnetic hyperfine field, two magnetic sextets associated with gamma-Fe(Ni, Co) phase can be related to the disordered and more ordered gamma-phases. The iron fractions in the detected phases can be roughly estimated as follows: (i) similar to 17.6% in the alpha(2)-Fe(Ni, Co) phase, (ii) similar to 68.5% in the alpha-Fe(Ni, Co) phase, (iii) similar to 11.5% in the disordered gamma-Fe(Ni, Co) phase, (iv) similar to 2.0% in the more ordered gamma-Fe(Ni, Co) phase, and (v) similar to 0.4% in the paramagnetic gamma-Fe(Ni, Co) phase. LA - English DB - MTMT ER - TY - JOUR AU - Kuki, Andras AU - Lipcsei, Sandor AU - Gere, Istvan AU - Jarai-Szabo, Ferenc AU - Gergely, Attila AU - Ugi, Dávid AU - Ispánovity, Péter Dusán AU - Dankházi, Zoltán AU - Groma, István AU - Neda, Zoltan TI - Statistical analogies between earthquakes, micro-quakes in metals and avalanches in the 1D Burridge-Knopoff model JF - GEOFIZIKA J2 - GEOFIZIKA VL - 40 PY - 2023 IS - 1 SP - 1 EP - 28 PG - 28 SN - 0352-3659 DO - 10.15233/gfz.2023.40.4 UR - https://m2.mtmt.hu/api/publication/34059206 ID - 34059206 N1 - Physics Department, Babeş-Bolyai University, Cluj-Napoca, Romania Department of Materials Physics, Eötvös Loránd University, Budapest, Hungary Cited By :1 Export Date: 7 February 2024 Correspondence Address: Néda, Z.; Physics Department, Romania; email: zoltan.neda@ubbcluj.ro AB - Universalities and intriguing analogies in the statistics of avalanches are revealed for three physical systems defined on largely different length and energy scales. Earthquakes induced by tectonic scale dynamics, micro-scale level quakes observed from slipping crystallographic planes in metals and a one-dimensional, room-scale spring-block type Burridge-Knopoff model is studied from similar statistical viewpoints. The validity of the Gutenberg-Richter law for the probability density of the energies dissipated in the avalanches is proven for all three systems. By analysing data for three different seismic zones and performing acoustic detection for different Zn samples under deformation, universality for the involved scaling exponent is revealed. With proper parameter choices the 1D Burridge-Knopoff model is able to reproduce the same scaling law. The recurrence times of earthquakes and micro-quakes with magnitudes above a given threshold present again similar distributions and striking quantitative similarities. However, the 1D Burridge-Knopoff model cannot account for the correlations observed in such statistics. LA - English DB - MTMT ER - TY - JOUR AU - Szabó, Péter Imre AU - Ugi, Dávid AU - Gilicze, B. AU - Dankházi, Zoltán AU - Lipcsei, S. AU - Homik, Zsolt AU - Tóth, Zsolt TI - Micromachining using the high energy flat-top beam of a femtosecond pulse UV laser system: micropillar prefabrication JF - APPLIED PHYSICS A - MATERIALS SCIENCE AND PROCESSING J2 - APPL PHYS A-MATER VL - 129 PY - 2023 IS - 6 PG - 9 SN - 0947-8396 DO - 10.1007/s00339-023-06679-x UR - https://m2.mtmt.hu/api/publication/33871039 ID - 33871039 N1 - A TKP2021-NVA-16 számú projekt a Kulturális és Innovációs Minisztérium Nemzeti Kutatási Fejlesztési és Innovációs Alapból nyújtott támogatásával a TKP2021-NVA pályázati program finanszírozásában valósult meg. High Intensity Laser Laboratory (HILL), Institue of Physics, University of Szeged, Dóm tér 9, Szeged, 6720, Hungary Department of Natural Science, University of Public Service, Budapest, 1441, Hungary Department of Materials Physics, Eötvös Loránd University, Pázmány Péter sétány 1/A, Budapest, 1117, Hungary Department of Medical Physics and Informatics, University of Szeged, Korányi fasor 9, Szeged, 6720, Hungary Export Date: 25 May 2023; Cited By: 0; Correspondence Address: P.I. Szabó; Department of Natural Science, University of Public Service, Budapest, 1441, Hungary; email: szabo.peter.imre@uni-nke.hu; CODEN: APAMF LA - English DB - MTMT ER - TY - JOUR AU - Goryunov, M. V. AU - Varga, G. AU - Dankházi, Zoltán AU - Felner, I. AU - Chukin, A. V. AU - Kuzmann, Ernő AU - Homonnay, Zoltán AU - Grokhovsky, V. I. AU - Oshtrakh, M. I. TI - Characterization of iron meteorites by scanning electron microscopy, X‐ray diffraction, magnetization measurements, and Mössbauer spectroscopy: Gibeon IVA JF - METEORITICS & PLANETARY SCIENCE J2 - METEORIT PLANET SCI VL - 58 PY - 2023 IS - 6 SP - 875 EP - 884 PG - 10 SN - 1086-9379 DO - 10.1111/maps.13984 UR - https://m2.mtmt.hu/api/publication/33844959 ID - 33844959 LA - English DB - MTMT ER - TY - JOUR AU - Lipcsei, Sándor AU - Kalácska, Szilvia AU - Ispánovity, Péter Dusán AU - Lábár, János AU - Dankházi, Zoltán AU - Groma, István TI - Statistical properties of fractal type dislocation cell structures JF - PHYSICAL REVIEW MATERIALS J2 - PHYS REV MAT VL - 7 PY - 2023 IS - 3 PG - 11 SN - 2475-9953 DO - 10.1103/PhysRevMaterials.7.033604 UR - https://m2.mtmt.hu/api/publication/33731168 ID - 33731168 LA - English DB - MTMT ER - TY - JOUR AU - Methani, Wissem AU - Pál, Edit AU - Lipcsei, Sándor AU - Ugi, Dávid AU - Pászti, Zoltán AU - Groma, István AU - Jenei, Péter AU - Dankházi, Zoltán AU - Kun, Róbert TI - Nanomechanical, Structural and Electrochemical Investigation of Amorphous and Crystalline MoO3 Thin-Film Cathodes in Rechargeable Li-Ion Batteries JF - BATTERIES J2 - BATTERIES VL - 8 PY - 2022 IS - 8 PG - 16 SN - 2313-0105 DO - 10.3390/batteries8080080 UR - https://m2.mtmt.hu/api/publication/33051154 ID - 33051154 N1 - Funding Agency and Grant Number: Ministry of Innovation and Technology of Hungary from the National Research, Development, and Innovation Fund, (NRDIO) [K 134696] Funding text: Project no. K 134696 was implemented with the support provided by the Ministry of Innovation and Technology of Hungary from the National Research, Development, and Innovation Fund, (NRDIO) financed under the OTKA K_20 funding scheme. AB - In this work, a comprehensive investigation of amorphous and crystalline modification of identical electrode active material as a thin-film electrode for a future all-solid-state Li-ion battery application is presented and discussed. Using the proposed micro-battery system, we aim to unravel the effect of the crystallinity of the positive electrode material on the intrinsic durability of all-solid-state thin-film Li-ion batteries during prolonged electrochemical cycling. We demonstrate the preparation, structural-, nanomechanical and electrochemical characteristics of molybdenum (VI) oxide (MoO3) thin-film cathodes based on their different crystallinity. The nanomechanical properties of the electrode layers were determined using nanoindentation along with acoustic emission studies. Based on the electrochemical test results, as-prepared thin films that did not go under any heat treatment showed the best performance and stability throughout cycling around 50 μAh initial capacity when cycled at C/2. This suits well their nanomechanical properties, which showed the highest hardness but also the highest flexibility in comparison with the heat-treated layers with lower hardness, high brittleness, and numerous cracks upon mechanical loads. According to our results, we state that amorphous-type electrode materials are more durable against electro-chemo-mechanical-aging related battery performance loss in all-solid-state Li-ion batteries compared to their crystalline counterparts. LA - English DB - MTMT ER - TY - JOUR AU - Ispánovity, Péter Dusán AU - Ugi, Dávid AU - Péterffy, Gábor AU - Knapek, Michal AU - Kalácska, Szilvia AU - Tüzes, Dániel AU - Dankházi, Zoltán AU - Máthis, Krisztián AU - Chmelik, Frantisek AU - Groma, István TI - Dislocation avalanches are like earthquakes on the micron scale JF - NATURE COMMUNICATIONS J2 - NAT COMMUN VL - 13 PY - 2022 IS - 1 PG - 10 SN - 2041-1723 DO - 10.1038/s41467-022-29044-7 UR - https://m2.mtmt.hu/api/publication/32801625 ID - 32801625 N1 - Funding Agency and Grant Number: Eotvos Lorand University Funding text: Open access funding provided by Eotvos Lorand University. AB - Metallic microsamples deform in a sequence of abrupt strain bursts. Here, the authors demonstrate by analysing the elastic waves emitted by these bursts that this intermittent process resembles earthquakes in several aspects, although on completely different spatial and temporal scales.Compression experiments on micron-scale specimens and acoustic emission (AE) measurements on bulk samples revealed that the dislocation motion resembles a stick-slip process - a series of unpredictable local strain bursts with a scale-free size distribution. Here we present a unique experimental set-up, which detects weak AE waves of dislocation slip during the compression of Zn micropillars. Profound correlation is observed between the energies of deformation events and the emitted AE signals that, as we conclude, are induced by the collective dissipative motion of dislocations. The AE data also reveal a two-level structure of plastic events, which otherwise appear as a single stress drop. Hence, our experiments and simulations unravel the missing relationship between the properties of acoustic signals and the corresponding local deformation events. We further show by statistical analyses that despite fundamental differences in deformation mechanism and involved length- and time-scales, dislocation avalanches and earthquakes are essentially alike. LA - English DB - MTMT ER - TY - JOUR AU - Ádám, Péter AU - Temesi, Ottó AU - Dankházi, Zoltán AU - Voniatis, Constantinos AU - Rohonczy, János AU - Sinkó, Katalin TI - Various colloid systems for drawing of aluminum oxide fibers JF - CERAMICS INTERNATIONAL J2 - CERAM INT VL - 48 PY - 2022 IS - 4 SP - 5499 EP - 5508 PG - 10 SN - 0272-8842 DO - 10.1016/j.ceramint.2021.11.094 UR - https://m2.mtmt.hu/api/publication/32499966 ID - 32499966 LA - English DB - MTMT ER -