TY - JOUR AU - Baross, Tétény AU - Ben Zine, Haroune Rachid AU - Bereczki, Péter AU - Palánkai, Miklós AU - Balázsi, Katalin AU - Balázsi, Csaba AU - Veres, Gábor TI - Diffusion Bonding of Al2O3 Dispersion-Strengthened 316L Composite by Gleeble 3800 JF - MATERIALS J2 - MATERIALS VL - 17 PY - 2024 IS - 10 PG - 14 SN - 1996-1944 DO - 10.3390/ma17102300 UR - https://m2.mtmt.hu/api/publication/34870335 ID - 34870335 AB - The aim of this work is to investigate the bonding properties of the ceramic dispersion-strengthened 316L (CDS-316L) composites with the reference 316L stainless steel (REF-316L) using a Gleeble 3800 physical simulator. In previous works, two different composites, REF-316L and 316L, with 1 wt% Al2O3 composite (CDS-316L) have been prepared by spark plasma sintering (SPS). In the present work, these specimens were diffusion-bonded using the following parameters: a temperature range of 950–1000 °C and a uniaxial pressure of 20–30 MPa. It was observed that the deformation of the CDS-316L during the uniaxial bonding process was higher compared to the 316L steel rods. The addition of alumina particles increased the micro-hardness of the 316L steel. The samples were broken in the CDS-316L zones, not at the diffusion-bonded interfaces. No diffusion zones have been observed within the investigated magnification for all composites, where the interfaces between the different specimens were well defined. LA - English DB - MTMT ER - TY - JOUR AU - Stasiak, T. AU - Debnárová, S. AU - Lin, S. AU - Koutná, N. AU - Czigány, Zsolt AU - Balázsi, Katalin AU - Buršíková, V. AU - Vašina, P. AU - Souček, P. TI - Synthesis and characterization of ceramic high entropy carbide thin films from the Cr-Hf-Mo-Ta-W refractory metal system JF - SURFACE AND COATINGS TECHNOLOGY J2 - SURF COAT TECH VL - 485 PY - 2024 PG - 12 SN - 0257-8972 DO - 10.1016/j.surfcoat.2024.130839 UR - https://m2.mtmt.hu/api/publication/34836957 ID - 34836957 AB - We use reactive DC magnetron sputtering to showcase synthesis strategies for multicomponent carbides with the NaCl-type fcc structure and illustrate how deposition conditions allow controlling the formation of metallic and ceramic single phases in the Cr-Hf-Mo-Ta-W system. The synthesis is performed in argon flow and different acetylene flows from 0 to 12sccm, at ambient and elevated temperatures (700 °C), respectively, hindering/promoting the adatom diffusion. Structural and microstructural investigations reveal the formation of the bcc metallic phase (a =3.188–3.209Å) in films deposited without acetylene flow, also supported by ab initio density function theory (DFT) analysis of lattice parameters as a function of the C content. Experimentally, a bcc-to-fcc phase transition is observed through the formation of an amorphous coating. Contrarily, samples deposited in higher acetylene flow show an fcc multielement carbide phase (a =4.33–4.49 Å). The crystalline films reveal columnar morphology, while the amorphous ones are very dense. We report promising mechanical properties, with hardness up to 25± 1GPa. The indentation moduli reach up to 319± 6GPa and show trends consistent with DFT predictions. Our study paves the path towards the preparation of Cr-Hf-Mo-Ta-W multicomponent carbides by magnetron sputtering, showing promising microstructure as well as mechanical properties. LA - English DB - MTMT ER - TY - JOUR AU - Furko, Monika AU - Detsch, Rainer AU - Horváth, Zsolt Endre AU - Balázsi, Katalin AU - Boccaccini, Aldo R. AU - Balázsi, Csaba TI - Amorphous, Carbonated Calcium Phosphate and Biopolymer-Composite-Coated Si3N4/MWCNTs as Potential Novel Implant Materials JF - NANOMATERIALS J2 - NANOMATERIALS-BASEL VL - 14 PY - 2024 IS - 3 PG - 16 SN - 2079-4991 DO - 10.3390/nano14030279 UR - https://m2.mtmt.hu/api/publication/34672527 ID - 34672527 LA - English DB - MTMT ER - TY - JOUR AU - Ženíšek, Jaroslav AU - Souček, Pavel AU - Ondračka, Pavel AU - Czigány, Zsolt AU - Buršíková, Vilma AU - Holec, David AU - Balázsi, Katalin AU - Vašina, Petr TI - Effect of Nb incorporation in Mo 2 BC coatings on structural and mechanical properties — Ab initio modelling and experiment JF - ACTA MATERIALIA J2 - ACTA MATER VL - 268 PY - 2024 PG - 12 SN - 1359-6454 DO - 10.1016/j.actamat.2024.119741 UR - https://m2.mtmt.hu/api/publication/34666828 ID - 34666828 LA - English DB - MTMT ER - TY - JOUR AU - Kaou, Maroua Houria AU - Furko, Monika AU - Ben Zine, Haroune Rachid AU - Balázsi, Katalin AU - Balázsi, Csaba TI - Morphological and structural evaluation of spark plasma sintered calcium silicate ceramics JF - INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY J2 - INT J APPL CERAM TEC VL - in press PY - 2024 SP - in press PG - 13 SN - 1546-542X DO - 10.1111/ijac.14684 UR - https://m2.mtmt.hu/api/publication/34555216 ID - 34555216 AB - Calcium silicate ceramics were successfully prepared at various temperatures by spark plasma sintering technique (SPS) using two different compositions, and their morphological and structural characteristics were thoroughly analyzed and compared by scanning electron microscope, X-ray diffraction, and apparent density measurements. The effect of the sintering method and temperature on microstructural properties has also been studied. The sintered samples prepared by SPS through a heat input of 800 degrees C showed the highest densification as results 800 degrees C was suggested as optimum sintering temperature. Different phases presented in pseudo-wollastonite, wollastonite, and triclinic Ca3(SiO4)O have been observed in the case of 50C50C with lowest porosity similar to 6%$\sim \;6\% $ and highest density 2.6 g/cm3, whereas the composition 10C90S resulted in a fully amorphous material presented in granular microstructure with density of 1.7 g/cm3.Schematic view of calcium silicate preparationimage LA - English DB - MTMT ER - TY - JOUR AU - Drevet, Richard AU - Souček, Pavel AU - Mareš, Pavel AU - Ondračka, Pavel AU - Dubau, Martin AU - Kolonits, Tamás AU - Czigány, Zsolt AU - Balázsi, Katalin AU - Vašina, Petr TI - Aluminum tantalum oxide thin films deposited at low temperature by pulsed direct current reactive magnetron sputtering for dielectric applications JF - VACUUM J2 - VACUUM VL - 221 PY - 2024 PG - 15 SN - 0042-207X DO - 10.1016/j.vacuum.2023.112881 UR - https://m2.mtmt.hu/api/publication/34445377 ID - 34445377 AB - This research aims at studying aluminum tantalum oxide thin films (AlxTayOz) deposited at low temperature for dielectric applications. These ternary oxide layers are synthesized at 180 °C by physical vapor deposition (PVD), specifically the mid-frequency pulsed direct current reactive magnetron sputtering. The deposition process uses targets made of a mixture of aluminum and tantalum in various proportions. Four target compositions are studied containing 95 at.%, 90 at.%, 80 at.%, and 70 at.% of aluminum, corresponding to 5 at.%, 10 at.%, 20 at.%, and 30 at.% of tantalum, respectively. The ternary oxide thin films of AlxTayOz are compared to aluminum oxide (AlxOz) and tantalum oxide (TayOz) layers produced in the same experimental conditions. The AlxTayOz thin films are dense, uniform, and amorphous regardless of the experimental conditions used in this study. Their chemical composition changes as a function of the target composition. The oxygen flow used during deposition also affects the chemical composition of the oxide layers and the deposition rate. The oxide thin films with tantalum are deposited at higher deposition rates and contain more oxygen. Tantalum also promotes the amorphization of the oxide layers. The highest dielectric strength is measured for the thin film containing a low amount of tantalum combined with a high amount of oxygen. LA - English DB - MTMT ER - TY - JOUR AU - Kaou, Maroua Houria AU - Furko, Monika AU - Balázsi, Katalin AU - Balázsi, Csaba TI - Advanced Bioactive Glasses: The Newest Achievements and Breakthroughs in the Area JF - NANOMATERIALS J2 - NANOMATERIALS-BASEL VL - 13 PY - 2023 IS - 16 PG - 33 SN - 2079-4991 DO - 10.3390/nano13162287 UR - https://m2.mtmt.hu/api/publication/34093975 ID - 34093975 AB - Bioactive glasses (BGs) are especially useful materials in soft and bone tissue engineering and even in dentistry. They can be the solution to many medical problems, and they have a huge role in the healing processes of bone fractures. Interestingly, they can also promote skin regeneration and wound healing. Bioactive glasses are able to attach to the bone tissues and form an apatite layer which further initiates the biomineralization process. The formed intermediate apatite layer makes a connection between the hard tissue and the bioactive glass material which results in faster healing without any complications or side effects. This review paper summarizes the most recent advancement in the preparation of diverse types of BGs, such as silicate-, borate- and phosphate-based bioactive glasses. We discuss their physical, chemical, and mechanical properties detailing how they affect their biological performances. In order to get a deeper insight into the state-of-the-art in this area, we also consider their medical applications, such as bone regeneration, wound care, and dental/bone implant coatings. LA - English DB - MTMT ER - TY - JOUR AU - Furko, Monika AU - Detsch, R. AU - Tolnai, István AU - Balázsi, Katalin AU - Boccaccini, A.R. AU - Balázsi, Csaba TI - Biomimetic mineralized amorphous carbonated calcium phosphate-polycaprolactone bioadhesive composites as potential coatings on implant materials JF - CERAMICS INTERNATIONAL J2 - CERAM INT VL - 49 PY - 2023 IS - 11 SP - 18565 EP - 18576 PG - 12 SN - 0272-8842 DO - 10.1016/j.ceramint.2023.02.231 UR - https://m2.mtmt.hu/api/publication/33767896 ID - 33767896 LA - English DB - MTMT ER - TY - JOUR AU - Furko, Monika AU - Balázsi, Katalin AU - Balázsi, Csaba TI - Calcium Phosphate Loaded Biopolymer Composites—A Comprehensive Review on the Most Recent Progress and Promising Trends JF - COATINGS J2 - COATINGS VL - 13 PY - 2023 IS - 2 PG - 30 SN - 2079-6412 DO - 10.3390/coatings13020360 UR - https://m2.mtmt.hu/api/publication/33649599 ID - 33649599 AB - Biocompatible ceramics are extremely important in bioengineering, and very useful in many biomedical or orthopedic applications because of their positive interactions with human tissues. There have been enormous efforts to develop bioceramic particles that cost-effectively meet high standards of quality. Among the numerous bioceramics, calcium phosphates are the most suitable since the main inorganic compound in human bones is hydroxyapatite, a specific phase of the calcium phosphates (CaPs). The CaPs can be applied as bone substitutes, types of cement, drug carriers, implants, or coatings. In addition, bioresorbable bioceramics have great potential in tissue engineering in their use as a scaffold that can advance the healing process of bones during the normal tissue repair process. On the other hand, the main disadvantages of bioceramics are their brittleness and poor mechanical properties. The newest advancement in CaPs doping with active biomolecules such as Mg, Zn, Sr, and others. Another set of similarly important materials in bioengineering are biopolymers. These include natural polymers such as collagen, cellulose acetate, gelatin, chitosan, and synthetic polymers, for example, polyvinyl pyrrolidone (PVP), polyvinyl alcohol (PVA), and polycaprolactone (PCL). Various types of polymer have unique properties that make them useful in different fields. The combination of CaP particles with different biopolymers gives rise to new opportunities for application, since their properties can be changed and adjusted to the given requirements. This review offers an insight into the most up-to-date advancements in the preparation and evaluation of different calcium phosphate–biopolymer composites, highlighting their application possibilities, which largely depend on the chemical and physical characteristics of CaPs and the applied polymer materials. Overall, these composites can be considered advanced materials in many important biomedical fields, with potential to improve the quality of healthcare and to assist in providing better outcomes as scaffolds in bone healing or in the integration of implants in orthopedic surgeries. LA - English DB - MTMT ER - TY - JOUR AU - Ben Zine, Haroune Rachid AU - Horváth, Zsolt Endre AU - Balázsi, Katalin AU - Balázsi, Csaba TI - Novel Alumina Dispersion-Strengthened 316L Steel Produced by Attrition Milling and Spark Plasma Sintering JF - COATINGS J2 - COATINGS VL - 13 PY - 2023 IS - 2 PG - 15 SN - 2079-6412 DO - 10.3390/coatings13020322 UR - https://m2.mtmt.hu/api/publication/33611439 ID - 33611439 AB - Alumina dispersion-strengthened 316L stainless steels were successfully produced using attrition milling and spark plasma sintering. Two different composites (316L/0.33 wt% and 316L/1 wt% Al2O3) were prepared by powder technology. The attrition milling produced a significant morphological transformation of the globular 316L starting powders and provided a homogeneous distribution of the nanosized alumina particles. The XRD results confirmed that the 316L steel was an austenitic γ-Fe3Ni2. The formation of a ferrite α-Fe phase was detected after milling; this was transformed to the austenitic γ-Fe3Ni2 after the sintering process. The addition of nanosized alumina particles increased the composites’ microhardness significantly to 2.25 GPa HV. With higher amounts of alumina, the nanosized particles tended to agglomerate during the milling process. The friction coefficient (FC) of the 316L/0.33 wt% Al2O3 and the 316L/1 wt% Al2O3 decreased because of the increase in the composite’s hardness; FC values of 0.96, 0.93 and 0.85, respectively, were measured respectively for the 316L reference, the 316L/0.33 wt% and the 316L/1 wt% Al2O3. The 316L/0.33 wt% Al2O3 composite had a higher flexural strength of 630.4 MPa compared with the 316L/1 wt% Al2O3 with 386.6 MPa; the lower value of the latter was related the agglomeration of the alumina powder during attrition milling. LA - English DB - MTMT ER -