@article{MTMT:34575832, title = {The effect of self-organization during deposition on the segregation behaviour of Au in the Si-Ge-Au nano-multilayer thermoelectric generator system}, url = {https://m2.mtmt.hu/api/publication/34575832}, author = {Gulyás, Szilvia and Katona, Gábor and Csiszár, Gábor and Tomán, János and Cserháti, Csaba and Erdélyi, Zoltán}, doi = {10.1016/j.matchar.2024.113699}, journal-iso = {MATER CHARACT}, journal = {MATERIALS CHARACTERIZATION}, volume = {209}, unique-id = {34575832}, issn = {1044-5803}, year = {2024}, eissn = {1873-4189}, orcid-numbers = {Tomán, János/0000-0003-3374-0147} } @{MTMT:34576321, title = {Kinetics of Surface Segregation in Alloys: Formation of Metastable States with Anti-Phase Boundaries Near the Surface}, url = {https://m2.mtmt.hu/api/publication/34576321}, author = {Beke, Dezső and Cserháti, Csaba}, booktitle = {Advances in Physical Metallurgy}, doi = {10.1201/9781003424000-46}, unique-id = {34576321}, year = {2023}, pages = {360-367} } @article{MTMT:34027209, title = {Effect of stacking order in cylindrical geometry on the growth of ZnAl2O4 spinel phase}, url = {https://m2.mtmt.hu/api/publication/34027209}, author = {Vecsei, Gergő and Jáger, Gabriella and Juhász, Laura and Tomán, János and Odhiambo, Vincent Otieno and Szilágyi, Imre Miklós and Erdélyi, Zoltán and Cserháti, Csaba}, doi = {10.1016/j.mtla.2023.101819}, journal-iso = {MATERIALIA}, journal = {MATERIALIA}, volume = {30}, unique-id = {34027209}, abstract = {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.}, year = {2023}, eissn = {2589-1529}, orcid-numbers = {Tomán, János/0000-0003-3374-0147} } @article{MTMT:33121260, title = {Két anyag aszimmetrikus házassága és egy új anyag születése}, url = {https://m2.mtmt.hu/api/publication/33121260}, author = {Jáger, Gabriella and Tomán, János and Juhász, Laura and Vecsei, Gergő and Erdélyi, Zoltán and Cserháti, Csaba}, journal-iso = {FIZIKAI SZEMLE}, journal = {FIZIKAI SZEMLE}, volume = {72}, unique-id = {33121260}, issn = {0015-3257}, year = {2022}, pages = {197-201}, orcid-numbers = {Tomán, János/0000-0003-3374-0147} } @article{MTMT:33072876, title = {Gaseous Nitriding of Binary Ni-Cr Alloys - Observation and Interpretation of Microstructural Features}, url = {https://m2.mtmt.hu/api/publication/33072876}, author = {Kodentsov, A. and Cserháti, Csaba}, doi = {10.24425/amm.2022.139695}, journal-iso = {ARCH METALL MATER}, journal = {ARCHIVES OF METALLURGY AND MATERIALS}, volume = {67}, unique-id = {33072876}, issn = {1733-3490}, abstract = {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.}, year = {2022}, eissn = {2300-1909}, pages = {1007-1020} } @article{MTMT:32911747, title = {Nucleation and growth kinetics of ZnAl2O4 spinel in crystalline ZnO – amorphous Al2O3 bilayers prepared by atomic layer deposition}, url = {https://m2.mtmt.hu/api/publication/32911747}, author = {Jáger, Gabriella and Tomán, János and Juhász, Laura and Vecsei, Gergő and Erdélyi, Zoltán and Cserháti, Csaba}, doi = {10.1016/j.scriptamat.2022.114857}, journal-iso = {SCRIPTA MATER}, journal = {SCRIPTA MATERIALIA}, volume = {219}, unique-id = {32911747}, issn = {1359-6462}, abstract = {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.}, keywords = {Spinel; Phase transformation kinetics; binary oxides; Ceramic thin films; Nucleation of phase transformations}, year = {2022}, eissn = {1872-8456}, orcid-numbers = {Tomán, János/0000-0003-3374-0147} } @article{MTMT:32803252, title = {Preparation of TiO2–MoO3 composite nanofibers by water-based electrospinning process and their application in photocatalysis}, url = {https://m2.mtmt.hu/api/publication/32803252}, author = {Odhiambo, Vincent Otieno and Le Ba, Thong and Kónya, Zoltán and Cserháti, Csaba and Erdélyi, Zoltán and C, Naomi Maritim and Szilágyi, Imre Miklós}, doi = {10.1016/j.mssp.2022.106699}, journal-iso = {MAT SCI SEMICON PROC}, journal = {MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING}, volume = {147}, unique-id = {32803252}, issn = {1369-8001}, abstract = {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.}, keywords = {Photocatalysis; Electrospinning; Visible light TiO–MoO nanofibers}, year = {2022}, eissn = {1873-4081}, orcid-numbers = {Kónya, Zoltán/0000-0002-9406-8596} } @article{MTMT:32741695, title = {Growth and Characterization of Graphene Layers on Different Kinds of Copper Surfaces}, url = {https://m2.mtmt.hu/api/publication/32741695}, author = {Rafailov, Peter M. and Sveshtarov, Peter K. and Mehandzhiev, Vladimir B. and Avramova, Ivalina and Terziyska, Penka and Petrov, Minko and Katranchev, Boyko and Naradikian, Haritun and Boyadjiev, Stefan I. and Cserháti, Csaba and Erdélyi, Zoltán and Szilágyi, Imre Miklós}, doi = {10.3390/molecules27061789}, journal-iso = {MOLECULES}, journal = {MOLECULES}, volume = {27}, unique-id = {32741695}, issn = {1420-3049}, keywords = {x-ray photoelectron spectroscopy; Graphene; raman spectroscopy; Ellipsometry; Chemical vapor deposition; Electron backscatter diffraction}, year = {2022}, eissn = {1420-3049} } @article{MTMT:31993728, title = {Interface induced diffusion}, url = {https://m2.mtmt.hu/api/publication/31993728}, author = {Gurbán, Sándor and Sulyok, Attila and Menyhárd, Miklós and Baradács, Eszter and Parditka, Bence and Cserháti, Csaba and Langer, Gábor and Erdélyi, Zoltán}, doi = {10.1038/s41598-021-88808-1}, journal-iso = {SCI REP}, journal = {SCIENTIFIC REPORTS}, volume = {11}, unique-id = {31993728}, issn = {2045-2322}, year = {2021}, eissn = {2045-2322}, orcid-numbers = {Menyhárd, Miklós/0000-0003-4581-5337} } @article{MTMT:31987224, title = {Transmission of 3\hbox {-keV Ne}^{7+} ion through nanocapillaries probing the discharge process}, url = {https://m2.mtmt.hu/api/publication/31987224}, author = {Stolterfoht, N. and Juhász, Zoltán and Herczku, Péter and Kovács, Sándor and Rácz, Richárd Péter and Biri, Sándor and Cserháti, Csaba and Sulik, Béla}, doi = {10.1140/epjd/s10053-021-00136-1}, journal-iso = {EUR PHYS J D}, journal = {EUROPEAN PHYSICAL JOURNAL D}, volume = {75}, unique-id = {31987224}, issn = {1434-6060}, year = {2021}, eissn = {1434-6079}, orcid-numbers = {Stolterfoht, N./0000-0001-6514-1056} }