TY - JOUR AU - Gulyás, Szilvia AU - Katona, Gábor AU - Csiszár, Gábor AU - Tomán, János AU - Cserháti, Csaba AU - Erdélyi, Zoltán TI - The effect of self-organization during deposition on the segregation behaviour of Au in the Si-Ge-Au nano-multilayer thermoelectric generator system JF - MATERIALS CHARACTERIZATION J2 - MATER CHARACT VL - 209 PY - 2024 PG - 13 SN - 1044-5803 DO - 10.1016/j.matchar.2024.113699 UR - https://m2.mtmt.hu/api/publication/34575832 ID - 34575832 LA - English DB - MTMT ER - TY - CHAP AU - Beke, Dezső AU - Cserháti, Csaba TI - Kinetics of Surface Segregation in Alloys: Formation of Metastable States with Anti-Phase Boundaries Near the Surface T2 - Advances in Physical Metallurgy PB - CRC Press CY - London SN - 9781003424000 PY - 2023 SP - 360 EP - 367 PG - 8 DO - 10.1201/9781003424000-46 UR - https://m2.mtmt.hu/api/publication/34576321 ID - 34576321 LA - English DB - MTMT ER - TY - JOUR AU - Vecsei, Gergő AU - Jáger, Gabriella AU - Juhász, Laura AU - Tomán, János AU - Odhiambo, Vincent Otieno AU - Szilágyi, Imre Miklós AU - Erdélyi, Zoltán AU - Cserháti, Csaba TI - Effect of stacking order in cylindrical geometry on the growth of ZnAl2O4 spinel phase JF - MATERIALIA J2 - MATERIALIA VL - 30 PY - 2023 PG - 5 SN - 2589-1529 DO - 10.1016/j.mtla.2023.101819 UR - https://m2.mtmt.hu/api/publication/34027209 ID - 34027209 N1 - Department of Solid State Physics, Faculty of Science and Technology, University of Debrecen, P.O. Box. 400, Debrecen, H-4002, Hungary Department of Solid State Physics, Doctoral School of Physics, Faculty of Science and Technology, University of Debrecen, P.O. Box. 400, Debrecen, H-4002, Hungary Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Szt. Gellért sqr. 4, Budapest, H-1111, Hungary Export Date: 29 June 2023 Correspondence Address: Cserháti, C.; Department of Solid State Physics, P.O. Box. 400, Hungary; email: cserhati.csaba@science.unideb.hu AB - Growth kinetics of ZnAl2O4 spinel phase was followed in double layered nanotubes (DLNTs), i.e. in cylindrical geometry in two different layer sequences. DLNTs were annealed at 700 °C in ambient atmosphere for different times. ZnAl2O4 phase formed due to solid-state reaction. To follow the growth kinetics of the spinel, thin lamellae were prepared from the cross sections of the tubes and studied in a transmission mode scanning electron microscope (TSEM). The phase grows parabolically with time, independently of the layer sequence. The growth rate was higher in the )ZnO)AlO) layer sequence, than for the reverse case. This can be explained by the competing vacancy fluxes induced by mechanical stress developing during the solid-state reaction and by the difference in the diffusion fluxes of the two constituents. This is the first case that the influence of closed geometry and layer sequence on spinel growth between two oxide layers has been experimentally investigated. LA - English DB - MTMT ER - TY - JOUR AU - Jáger, Gabriella AU - Tomán, János AU - Juhász, Laura AU - Vecsei, Gergő AU - Erdélyi, Zoltán AU - Cserháti, Csaba TI - Két anyag aszimmetrikus házassága és egy új anyag születése JF - FIZIKAI SZEMLE J2 - FIZIKAI SZEMLE VL - 72 PY - 2022 IS - 7 SP - 197 EP - 201 PG - 5 SN - 0015-3257 UR - https://m2.mtmt.hu/api/publication/33121260 ID - 33121260 N1 - "A munka az Innovációs és Technológiai Minisztérium által meghirdetett Tématerületi Kiválósági Program (TKP2021-NKTA-34), valamint az Innovációs és Technológiai Minisztérium ÚNKP-21-3-II-DE297 kódszámú Új Nemzeti Kiválóság Programjának a Nemzeti Kutatási, Fejlesztési és Innovációs Alapból finanszírozott szakmai támogatásával valósult meg (ösztöndíjas: J. G.)." LA - Hungarian DB - MTMT ER - TY - JOUR AU - Kodentsov, A. AU - Cserháti, Csaba TI - Gaseous Nitriding of Binary Ni-Cr Alloys - Observation and Interpretation of Microstructural Features JF - ARCHIVES OF METALLURGY AND MATERIALS J2 - ARCH METALL MATER VL - 67 PY - 2022 IS - 3 SP - 1007 EP - 1020 PG - 14 SN - 1733-3490 DO - 10.24425/amm.2022.139695 UR - https://m2.mtmt.hu/api/publication/33072876 ID - 33072876 N1 - Export Date: 08 September 2022; Cited By: 0; Correspondence Address: A. Kodentsov; Mat-Tech BV, Development & Testing, Son, Netherlands; email: A.Kodentsov@mat-tech.com; AB - Gaseous nitriding of binary Ni-Cr solid-solution alloys was studied at 1125°C over the range 1 to 6000 bar of N2-pressure. At the specified temperature the nitriding response of the Ni-Cr alloys depends on the Cr-content in the initial alloy and activity (fugacity) of nitrogen at the gas/metal interface. Transition from cubic δ-CrN to hexagonal β-Cr2N precipitation occurs within the reaction zone after nitrogenization at 1125°C under nitrogen pressure 100-6000 bar when chromium content in the initial alloy is 28 at. % or higher. It was found that a ternary phase, π (Cr12.8Ni7.2N4.0) is formed inside the Ni32Cr alloy upon cooling in nitrogen after nitriding at 1125°C and 1 bar of N2. Experimental evidence is presented that π-phase is involved in peritectoid relations with β-Cr2N and γ-(Ni-Cr) solid solution. It was also demonstrated that nitriding behaviour of the Ni-Cr alloy can be rationalized using pertinent phase diagram information, but, in some cases, effect of mechanical stresses induced upon the internal precipitation can vitiate this prediction. LA - English DB - MTMT ER - TY - JOUR AU - Jáger, Gabriella AU - Tomán, János AU - Juhász, Laura AU - Vecsei, Gergő AU - Erdélyi, Zoltán AU - Cserháti, Csaba TI - Nucleation and growth kinetics of ZnAl2O4 spinel in crystalline ZnO – amorphous Al2O3 bilayers prepared by atomic layer deposition JF - SCRIPTA MATERIALIA J2 - SCRIPTA MATER VL - 219 PY - 2022 SN - 1359-6462 DO - 10.1016/j.scriptamat.2022.114857 UR - https://m2.mtmt.hu/api/publication/32911747 ID - 32911747 N1 - Funding Agency and Grant Number: National Research, Development and Innovation Fund of Hungary [TKP2021-NKTA-34]; New National Excellence Program of the Ministry for Innovation and Technology from the source of the National Research, Development and Innovation Fund [UNKP-21-3-II-DE-297] Funding text: Project no. TKP2021-NKTA-34 has been implemented with the support provided from the National Research, Development and Innovation Fund of Hungary, financed under the TKP2021-NKTA funding scheme. G.J. was supported by the UNKP-21-3-II-DE-297 New National Excellence Program of the Ministry for Innovation and Technology from the source of the National Research, Development and Innovation Fund. AB - Applying scanning electron microscopy in transmission mode and grazing incidence X-ray diffraction, we investigated the spinel-forming solid-state reaction between crystalline ZnO and amorphous Al2O3 layers prepared by atomic layer deposition. We observed two-stage phase growth of the crystalline ZnAl2O4 product layer. During the first stage, flat, pancake-like islands are formed in the nucleation process and these nuclei grow laterally without much increment in thickness. After these islands grow together to form a continuous layer, planar growth is happening in the second stage. We show that the solid-state reaction is governed by grain boundary and interface diffusion instead of interface reaction control observed between crystalline parent phases. LA - English DB - MTMT ER - TY - JOUR AU - Odhiambo, Vincent Otieno AU - Le Ba, Thong AU - Kónya, Zoltán AU - Cserháti, Csaba AU - Erdélyi, Zoltán AU - C, Naomi Maritim AU - Szilágyi, Imre Miklós TI - Preparation of TiO2–MoO3 composite nanofibers by water-based electrospinning process and their application in photocatalysis JF - MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING J2 - MAT SCI SEMICON PROC VL - 147 PY - 2022 PG - 8 SN - 1369-8001 DO - 10.1016/j.mssp.2022.106699 UR - https://m2.mtmt.hu/api/publication/32803252 ID - 32803252 N1 - Funding Agency and Grant Number: NRDI [K 124212, TNN_16 123631]; European Union [VEKOP-2.3.2-16-2017-00013]; State of Hungary; Stipendium Hungaricum scholarship; National Research, Development and Innovation Fund of Hungary [TKP2021-NKTA-34]; European Regional Development Fund; NRDI Office under the auspices of the Ministry for Innovation and Technology Funding text: An NRDI K 124212 and an NRDI TNN_16 123631 grants are acknowledged. The research within project No. VEKOP-2.3.2-16-2017-00013 was supported by the European Union and the State of Hungary, co-financed by the European Regional Development Fund. The research reported in this paper and carried out at BME has been supported by Stipendium Hungaricum scholarship and the NRDI Fund TKP2021 BME-NVA based on the charter of bolster issued by the NRDI Office under the auspices of the Ministry for Innovation and Technology. .This research is under Project no. TKP2021-NKTA-34 implemented with the support provided from the National Research, Development and Innovation Fund of Hungary, financed under the TKP2021-NKTA funding scheme. AB - Coupling TiO2 nanofibers with other semiconductor metal oxides can effectively extend the light absorbability of TiO2 to the visible range of the electromagnetic spectrum. This study demonstrates the synthesis of TiO2–MoO3 composite nanofibers via electrospinning using Ti and Mo water-soluble precursors. Aqueous solutions of these precursors were added to a PVP solution in N–N dimethylformamide. The mixture was electrospun, followed by annealing in air at 600 °C obtaining oxide nanofibers. The fibers were characterized via thermogravimetry and differential thermal analysis, X-ray photoelectron spectroscopy, scanning electron microscopy and energy-dispersive X-ray spectroscopy, transmission electron microscopy, Fourier-transform infrared spectroscopy, X-ray diffraction, and Raman spectroscopy. The diameter of the TiO2–MoO3 fibers was between 90 and 110 nm after annealing, Furthermore, methylene blue dye was used to investigate the photocatalytic activity of the fibers in visible light. TiO2–MoO3 fibers showed the best photocalaytic activity with a rate constant of 0.0018 min−1 while pure TiO2 and MoO3 nanofibers had 0.0009 min−1 and 0.0008 min−1 respectively. LA - English DB - MTMT ER - TY - JOUR AU - Rafailov, Peter M. AU - Sveshtarov, Peter K. AU - Mehandzhiev, Vladimir B. AU - Avramova, Ivalina AU - Terziyska, Penka AU - Petrov, Minko AU - Katranchev, Boyko AU - Naradikian, Haritun AU - Boyadjiev, Stefan I. AU - Cserháti, Csaba AU - Erdélyi, Zoltán AU - Szilágyi, Imre Miklós TI - Growth and Characterization of Graphene Layers on Different Kinds of Copper Surfaces JF - MOLECULES J2 - MOLECULES VL - 27 PY - 2022 IS - 6 PG - 14 SN - 1420-3049 DO - 10.3390/molecules27061789 UR - https://m2.mtmt.hu/api/publication/32741695 ID - 32741695 N1 - 329206 LA - English DB - MTMT ER - TY - JOUR AU - Gurbán, Sándor AU - Sulyok, Attila AU - Menyhárd, Miklós AU - Baradács, Eszter AU - Parditka, Bence AU - Cserháti, Csaba AU - Langer, Gábor AU - Erdélyi, Zoltán TI - Interface induced diffusion JF - SCIENTIFIC REPORTS J2 - SCI REP VL - 11 PY - 2021 PG - 10 SN - 2045-2322 DO - 10.1038/s41598-021-88808-1 UR - https://m2.mtmt.hu/api/publication/31993728 ID - 31993728 LA - English DB - MTMT ER - TY - JOUR AU - Stolterfoht, N. AU - Juhász, Zoltán AU - Herczku, Péter AU - Kovács, Sándor AU - Rácz, Richárd Péter AU - Biri, Sándor AU - Cserháti, Csaba AU - Sulik, Béla TI - Transmission of 3\hbox {-keV Ne}^{7+} ion through nanocapillaries probing the discharge process JF - EUROPEAN PHYSICAL JOURNAL D J2 - EUR PHYS J D VL - 75 PY - 2021 IS - 4 SN - 1434-6060 DO - 10.1140/epjd/s10053-021-00136-1 UR - https://m2.mtmt.hu/api/publication/31987224 ID - 31987224 LA - English DB - MTMT ER -