ORALS

SESSION: AdvancedMaterialsMonPM1-R10	6th Intl. Symp. on New & Advanced Materials & Technologies for Energy, Environment, Health & Sustainable Development
Mon. 28 Nov. 2022 / Room: Saitong
Session Chairs: Tetiana Prikhna; Session Monitor: TBA

14:00: [AdvancedMaterialsMonPM105] OS
Aluminum dodecaboride - and boron carbide-based ceramics for extreme environments
Tetiana Prikhna¹ ; Pavlo Barvitskiy² ; Viktor Moshchil² ; Olena Prysiazhna³ ; Myroslav Karpets² ; Semyon Ponomaryov⁴ ; Volodymyr Kushch³ ; Valeriy Muratov⁵ ; Fernard Marquis⁶ ; ¹V. Bakul Institute NASU, Kiev, Ukraine; ²Institute for Superhard Materials, Kiev, Ukraine; ³Institute for Superhard Materials of the National Academy of Sciences of Ukraine, Kiev, Ukraine; ⁴Institute of Semiconductor Physics of the National Academy of Sciences of Ukraine (NASU), Kyiv, Ukraine; ⁵(1) Frantsevich Institute for Problems of Materials Science of the National Academy of Sciences of Ukraine, Kyiv, Ukraine; ⁶Naval Postgraduate School, Monterey, United States;
Paper Id: 285 [Abstract]

The developed lightweight dodecaboride - and boron carbide-based ceramic composites hold great potential for a wide range of applications in extreme conditions: personal protection or for armored defense of ground military equipment and vehicles for the manufacture of abrasive nozzles, friction pairs for pumping oil and other aggressive liquids, constructional ceramics for nuclear power plants, etc. The correlations between structures and mechanical characteristics of alpha-AlB¹²-, AlB₁₂C2-, B₄C-based lightweight ceramics and composites synthesized or sintered by hot pressing (at 30 MPa). The effect of C, TiC and SiC additions on the properties of the resultant composites and the particularities of the ceramics destruction under shock loading are discussed. Computer modeling of the influence of construction parameters of ceramic-composite barrier on ballistic steel rod of the B-32 armor-piercing bullet (hardness HRC = 67 and 5,32 g weight of the steel core) into a two-layer ceramic-composite barrier was performed. Ballistic tests performed on 10 mm thick plates fabricated from the developed ceramics showed that the materials could withstand shot using a bullet with initial kinetic energy of 3.7 kJ.

SESSION: AdvancedMaterialsMonPM1-R10	6th Intl. Symp. on New & Advanced Materials & Technologies for Energy, Environment, Health & Sustainable Development
Mon. 28 Nov. 2022 / Room: Saitong
Session Chairs: Tetiana Prikhna; Session Monitor: TBA

15:15: [AdvancedMaterialsMonPM108] OS
MAGNETIC PROPERTIES AND APPLICATIONS OF IRON OXIDES NANOPOWDERS OBTAINED BY THE ELECTRO-EROSION DISPERSION AND SINTERED FROM THEM BULKS AT HIGH-PRESSURE
Tetiana Prikhna¹ ; Mykola Monastyrov² ; Bernd Büchner³ ; Fernand D. S. Marquis⁴ ; Florian Kongoli⁵ ; Sebastian Gaß³ ; Aniruddha Sathyadharma Prasad³ ; Ivan Soldatov³ ; Pavel Potapov³ ; Kai Neufeld³ ; Vitaliy Romaka³ ; Lars Giebeler³ ; Valeriy Shatilo⁶ ; Myroslav Karpets⁷ ; Anja Wolter Giraud³ ; Alexander Borimskiy⁸ ; ¹V. Bakul Institute NASU, Kiev, Ukraine; ²Open International University of Human Development Ukraine, Kiev, Ukraine; ³Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden e. V., Dresden, Germany; ⁴United Nano technologies (UNT) and Integrated Materials Technologies and Systems (IMTS), Rapid City, United States; ⁵FLOGEN Technologies, Mont-Royal, Canada; ⁶D.F. Chebotaryov Institute of Gerontology of the National Academy of Medical Sciences of Ukraine, Kyiv, Ukraine; ⁷Institute for Superhard Materials, Kiev, Ukraine; ⁸V. Bakul Institute for Superhard Materials of the National Academy of Sciences of Ukraine, Kyiv, Ukraine;
Paper Id: 394 [Abstract]

Nanodispersed iron oxides obtained by us using the electroerosion dispersion (EED) technology [1, 2] have a wide range of applications. The EED method can be used for recycling of metals chips and granules. The polyvalent nanopowders of iron oxides due to magnetic characteristics, in particular, are successfully used in medicine for blood thinning and as antianemic specimen of prolonged action to saturate the blood with oxygen and maintain saturation at the optimal level for human life; in animal husbandry as feed additives to accelerate the growth of livestock and in increasing the laying capacity of birds. In 2020-2021 the dietary supplement "Lisoferrin" and feed additive "Nano-Fe" were developed and certified in Ukraine, although the mechanism of their action the appertaining processes remain not fully understood. It has been observed that the developed nanopowders of iron oxides also have a positive effect on the treatment of a wide range of other diseases, such as: related to dementia, cognitive disorders, contribute to the reduction of blood sugar levels, accelerate the healing of purulent wounds in varicose veins and the fusion of broken bones, etc. In addition, the developed nanopowders are characterized by a high ability to absorb ultra-high-frequency radiation (higher than the commercial powders of iron oxide ‟Magsilica”, produced in Germany) [1], and are therefore promising for the production of shielding which absorb ultrahigh frequency electromagnetic radiation. The iron oxide nanopowders developed in this research have a high adsorption capacity in relation to heavy metal ions [3] and are promising for water purification and wastewater treatment [3, 4]. From the point of view of magnetic properties, they are close to soft magnetic materials and demonstrate superparamagnetic behavior [1]. The bulk materials consolidated from the Fe-O nano powders under high pressure conditions (using 2 GPa pressure at 1200 and 1300 °C for 0.07 h in contact with hexagonal boron nitride) also exhibited soft magnetic behavior, which makes their use very promising in electrical engineering and in other branches of industrial technology. The structure of sintered materials was investigated by X-ray diffraction with Rietveld refinement and showed that the materials consolidated under 2 GPa at 900 and 1000 °C contained 75–80 wt.% FeO and 25–20 wt.% Fe, and the materials sintered at 1100 ^oC, in parallel with 32 wt. % FeO and 2 wt.% Fe was present contained a significant amount of Fe₃N: 66 wt.%. However, the structure of the same materials consolidated at 1200-1300 °C contained about 100% of the Fe₃N phase. Thus, under conditions of high pressures and temperatures with increasing sintering temperature, reduction of iron oxide was observed, followed by its nitriding with nitrogen released from the boron nitride, which led to improvement of soft magnetic characteristics of sintered materials.

References:
[1] B. Halbedel, T. Prikhna, P. Quiroz, T. Kups, M. Monastyrov, Current Applied Physics, 18(11) (2018) 1410–1414.
[2] M.K. Monastyrov, T.A. Prikhna, A.G. Mamalis, W. Gawalek, P.M. Talanchuk, R.V. Shekera Nanotechnology Perceptions, 4 (2008) 179–187.
[3] M. Monastyrov, T. Prikhna, B. Halbedel, A.G. Mamalis, O. Prysiazhna, Nanotechnology Perceptions. 15(1) (2019) 48–57. N24MO18A
[4] G. Kochetov, T. Prikhna, D. Samchenko, O. Prysiazhna, M. Monastyrov, V. Moshchil, A. Mamalis, Nanotechnology Perceptions, 17(1) (2021) 9–12.

SESSION: AdvancedMaterialsMonPM2-R10	6th Intl. Symp. on New & Advanced Materials & Technologies for Energy, Environment, Health & Sustainable Development
Mon. 28 Nov. 2022 / Room: Saitong
Session Chairs: Stanislaw Pietrzyk; Session Monitor: TBA

16:20: [AdvancedMaterialsMonPM210] OS
Oxidation resistance of Ti-Al-C MAX phases-based bulk materials and coatings at high-temperatures
Tetiana Prikhna¹ ; Orest Ostash² ; Alexander Kuprin³ ; Viktoriya Podhurska⁴ ; Thierry Cabioc'h⁵ ; Tetiana Serbenyuk⁶ ; Viktor Moshchil⁷ ; Vladimir Sverdun⁶ ; Myroslav Karpets⁷ ; Semyon Ponomarov⁸ ; Alexandra Starostina⁶ ; Fernand D. S. Marquis⁹ ; Florian Kongoli¹⁰ ; ¹V. Bakul Institute NASU, Kiev, Ukraine; ²Karpenko Physical-Mechanical Institute of the National Academy of Sciences of Ukraine, Lviv, Ukraine; ³National Science Center Kharkov Institute of Physics and Technology, Kharkov, Ukraine; ⁴Physico-Mechanical Institute of the National Academy of Sciences of Ukraine, Lviv, Ukraine; ⁵Universite de Poitiers, CNRS/Laboratoire PHYMAT, Chasseneuil Futuroscope Cedex, France; ⁶Institute for Superhard Materials of the National Academy of Sciences of Ukraine, Kiev, Ukraine; ⁷Institute for Superhard Materials, Kiev, Ukraine; ⁸Institute of Semiconductor Physics, Kiev, Ukraine; ⁹United Nano technologies (UNT) and Integrated Materials Technologies and Systems (IMTS), Rapid City, United States; ¹⁰FLOGEN Technologies, Mont-Royal, Canada;
Paper Id: 284 [Abstract]

The, results of variations of structure in oxidizing atmosphere at high temperatures (after heating and thermocycling up to 600 – 1400 ^oC), and electrical conductivity (after long time heating at 600 ^oC) of MAX Ti₂AlC-, Ti₃AlC₂- and (Ti,Nb)₃AlC₂-based bulk materials with different porosity (prepared by synthesis in vacuum and/or by hot pressing) and coatings (vacuum-arc deposited) are presented. The characteristics of highly dense Ti-Al-C composite bulks and vacuum-arc deposited 6 m thick coatings before and after heating at 600 ^°C in air for 1000 h were compared. High electrical conductivity ((The, results of variations of structure in oxidizing atmosphere at high temperatures (after heating and thermocycling up to 600 – 1400 ^oC), and electrical conductivity (after long time heating at 600 ^oC) of MAX Ti₂AlC-, Ti₃AlC₂- and (Ti,Nb)₃AlC₂-based bulk materials with different porosity (prepared by synthesis in vacuum and/or by hot pressing) and coatings (vacuum-arc deposited) are presented. The characteristics of highly dense Ti-Al-C composite bulks and vacuum-arc deposited 6 &#181;m thick coatings before and after heating at 600 °C in air for 1000 h were compared. High electrical conductivity (<i>delta</i> m/S =1.3•10⁶ S/m) of the highly resistant toward oxidation (<i>delta</i> m/S=0.07 mg/cm²) Ti-Al-C coating was preserved after long-term heating in air. It was found that the specimen surface layers of MAX-phases Ti₃AlC₂ and Ti₂AlC based bulks and chromium-containing Crofer 22APU steel became semiconductors because of high-temperature long-term oxidation (at 600 ^°C). The vacuum-arc deposited Ti-Al-C coating revealed high oxidation resistance and electrical conductivity along with good mechanical characteristics, namely nanohardness H (10 mN)= 9.5±1.5 GPa, and Young’s modulus E=190±10 GPa, which make it very promising for interconnects of solid oxide fuel cells (SOFCs). Acknowledgements The investigations were performed in the frames of the project NATO SPS G5773 “Advanced Material Engineering to Address Emerging Security Challenges” for 2020-2023, the project 03-03-20 of Ukrainian-Belorussian cooperation for 2020-2021, and the projects III-3-20 (0779), III-5-19 (0778), and II-5-19 (ІНМ-29/20) supported by the National Academy of Sciences of Ukraine.