TY - JOUR AU - Arjmandabasi, T. AU - Révész, Ádám AU - Kovácsné Kis, Viktória AU - Ugi, Dávid AU - Schafler, E. AU - Kovács, Zsolt TI - Radial dependence of thermal, structural and micro deformation characteristics in Cu-Zr-Al bulk metallic glass subjected to high pressure torsion JF - MATERIALS AND DESIGN J2 - MATER DESIGN VL - 244 PY - 2024 PG - 10 SN - 0264-1275 DO - 10.1016/j.matdes.2024.113113 UR - https://m2.mtmt.hu/api/publication/35078887 ID - 35078887 N1 - Department of Materials Physics, Eötvös Loránd University ELTE, H-1117 Pázmány Péter st. 1/A, Budapest, Hungary HUN-REN Centre for Energy Research, Institute of Technical Physics and Materials Science, H-1121 Konkoly-Thege Miklós út 29-33, Budapest, Hungary Department of Mineralogy, Eötvös Loránd University, H-1117 Pázmány Péter sétány 1/c, Budapest, Hungary Faculty of Physics, University of Vienna, A-1090, Boltzmanngasse 5, Vienna, Austria Export Date: 2 September 2024 Correspondence Address: Révész, Á.; Department of Materials Physics, H-1117 Pázmány Péter st. 1/A, Hungary; email: revesz.adam@ttk.elte.hu LA - English DB - MTMT ER - TY - JOUR AU - Dallos, Zsolt AU - Golle-Leidreiter, Philipp AU - Molnár, Zsombor AU - Kristály, Ferenc AU - Kovácsné Kis, Viktória AU - Dódony, István TI - Structural Changes of Bioapatite during Heat Treatment JF - CRYSTAL GROWTH & DESIGN J2 - CRYST GROWTH DES VL - 24 PY - 2024 IS - 5 SP - 2058 EP - 2063 PG - 6 SN - 1528-7483 DO - 10.1021/acs.cgd.3c01375 UR - https://m2.mtmt.hu/api/publication/34722932 ID - 34722932 LA - English DB - MTMT ER - TY - JOUR AU - Gong, J.M. AU - Liu, X. AU - Yang, L.H. AU - Sulyok, Attila AU - Baji, Zsófia AU - Kovácsné Kis, Viktória AU - Tőkési, Károly AU - Zeng, R.G. AU - Fang, G.J. AU - Gong, J.B. AU - Xiao, X.D. AU - Da, B. AU - Ding, Z.J. TI - Optical properties of hafnium-dioxide derived from reflection electron energy loss spectroscopy spectra JF - JOURNAL OF ALLOYS AND COMPOUNDS J2 - J ALLOY COMPD VL - 1005 PY - 2024 PG - 12 SN - 0925-8388 DO - 10.1016/j.jallcom.2024.175744 UR - https://m2.mtmt.hu/api/publication/35178732 ID - 35178732 N1 - CODEN: JALCE LA - English DB - MTMT ER - TY - JOUR AU - Hegedűs, Máté AU - Kovácsné Kis, Viktória AU - Kovács, Zsolt TI - A fogzománc szerkezeti és mechanikai tulajdonságai JF - FIZIKAI SZEMLE J2 - FIZIKAI SZEMLE VL - 74 PY - 2024 IS - 2 SP - 56 EP - 61 PG - 6 SN - 0015-3257 UR - https://m2.mtmt.hu/api/publication/34738071 ID - 34738071 N1 - "A kutatás pénzügyi hátterét a Nemzeti Kutatási, Fejlesztési és Innovációs Hivatal biztosította a K-125100 számú pályázat keretében. Köszönettel tartozunk a [4, 9] publikációk társszerzőinek." LA - Hungarian DB - MTMT ER - TY - JOUR AU - Hegedűs, Máté AU - Kovácsné Kis, Viktória AU - Rózsa, Noémi Katinka AU - Kovács, Zsolt TI - A novel image processing procedure for the quantitative evaluation of dental enamel prism arrangement JF - MICROSCOPY RESEARCH AND TECHNIQUE J2 - MICROSC RES TECHNIQ VL - 87 PY - 2024 IS - 4 SP - 808 EP - 817 PG - 10 SN - 1059-910X DO - 10.1002/jemt.24473 UR - https://m2.mtmt.hu/api/publication/34435717 ID - 34435717 N1 - CODEN: MRTEE AB - Abstract Enamel prism is the main microstructural unit of mammalian enamel which composed of hundreds of bioapatite nanocrystals. Prism structure plays a key role in the excellent mechanical performance of dental enamel during millions of chewing cycles without significant remodeling. Thus, quantitative understanding of prism architecture is of utmost importance for biomechanical materials design. To characterize enamel prism orientation quantitatively, a novel image processing method has been developed. Our method is based on scanning electron microscopy images of etched enamel surface and consists of an ellipse fitting procedure, which provides a numerical approximation of prism shape and orientation in the studied cross section. The obtained analytical data allow to construct color coded orientation maps, which provide quick and useful insight into the microstructure of enamel. Besides striking visualization, orientation maps allow to extract and plot the rich information on the azimuthal and inclination angles of the prisms as function of location. Numerical data on prism arrangement can be analyzed using statistical tools over large areas, which paves the way towards quantifying comparative investigation of prism arrangement either in dentistry research or evolution biology. The application of the method is demonstrated for a distal?mesial cross-section of sound human tooth enamel. Highlights Scanning electron microscopy images of etched enamel surface are analyzed using ellipse fitting. Geometrical parameters of the fitted ellipses provide numerical data of thousands of prisms. Prism arrangement is visualized on color coded orientation maps and analyzed using statistical tools. LA - English DB - MTMT ER - TY - JOUR AU - Kovácsné Kis, Viktória AU - Kovács, Zsolt AU - Czigány, Zsolt TI - Improved Method for Electron Powder Diffraction-Based Rietveld Analysis of Nanomaterials JF - NANOMATERIALS J2 - NANOMATERIALS-BASEL VL - 14 PY - 2024 IS - 5 PG - 17 SN - 2079-4991 DO - 10.3390/nano14050444 UR - https://m2.mtmt.hu/api/publication/34699351 ID - 34699351 AB - Multiphase nanomaterials are of increasing importance in material science. Providing reliable and statistically meaningful information on their average nanostructure is essential for synthesis control and applications. In this paper, we propose a novel procedure that simplifies and makes more effective the electron powder diffraction-based Rietveld analysis of nanomaterials. Our single step in-TEM method allows to obtain the instrumental broadening function of the TEM directly from a single measurement without the need for an additional X-ray diffraction measurement. Using a multilayer graphene calibration standard and applying properly controlled acquisition conditions on a spherical aberration-corrected microscope, we achieved the instrumental broadening of ±0.01 Å in terms of interplanar spacing. The shape of the diffraction peaks is modeled as a function of the scattering angle using the Caglioti relation, and the obtained parameters for instrumental broadening can be directly applied in the Rietveld analysis of electron diffraction data of the analyzed specimen. During peak shape analysis, the instrumental broadening parameters of the TEM are controlled separately from nanostructure-related peak broadening effects, which contribute to the higher reliability of nanostructure information extracted from electron diffraction patterns. The potential of the proposed procedure is demonstrated through the Rietveld analysis of hematite nanopowder and two-component Cu-Ni nanocrystalline thin film specimens. LA - English DB - MTMT ER - TY - JOUR AU - Lázár, Károly AU - Máthé, Z AU - Németh, Tibor AU - Kovácsné Kis, Viktória AU - Stichleutner, Sándor AU - Kovács, Ivett TI - Iron-Bearing Minerals in the Boda Claystone Formation: Correspondences with Stages of Evolution Revealed by Mössbauer Spectroscopy JF - MINERALS J2 - MINERALS-BASEL VL - 14 PY - 2024 IS - 2 PG - 24 SN - 2075-163X DO - 10.3390/min14020196 UR - https://m2.mtmt.hu/api/publication/34643332 ID - 34643332 LA - English DB - MTMT ER - TY - JOUR AU - McDonough, LK. AU - Campbell, M AU - Treble, PC. AU - Marjo, C AU - Frisia, S AU - Vongsvivut, J AU - Klein, AR. AU - Kovácsné Kis, Viktória AU - Baker, A TI - Fire-induced shifts in stalagmite organic matter mapped using Synchrotron infrared microspectroscopy JF - ORGANIC GEOCHEMISTRY J2 - ORG GEOCHEM VL - 195 PY - 2024 PG - 14 SN - 0146-6380 DO - 10.1016/j.orggeochem.2024.104842 UR - https://m2.mtmt.hu/api/publication/35211566 ID - 35211566 LA - English DB - MTMT ER - TY - JOUR AU - Olasz, Dániel AU - Kovácsné Kis, Viktória AU - Cora, Ildikó AU - Németh, Miklós László AU - Sáfrán, György TI - High-Throughput Micro-Combinatorial TEM Phase Mapping of the DC Magnetron Sputtered YxTi1−xOy Thin Layer System JF - NANOMATERIALS J2 - NANOMATERIALS-BASEL VL - 14 PY - 2024 IS - 11 PG - 14 SN - 2079-4991 DO - 10.3390/nano14110925 UR - https://m2.mtmt.hu/api/publication/35218060 ID - 35218060 LA - English DB - MTMT ER - TY - JOUR AU - Schwarcz, H.P. AU - Nassif, Nadine AU - Kovácsné Kis, Viktória TI - Mineral curved platelets in bone JF - ACTA BIOMATERIALIA J2 - ACTA BIOMATER VL - 183 PY - 2024 SP - 201 EP - 209 PG - 20 SN - 1742-7061 DO - 10.1016/j.actbio.2024.05.047 UR - https://m2.mtmt.hu/api/publication/34943673 ID - 34943673 LA - English DB - MTMT ER -