PREPARING BY PRESSURELESS SINTERING OF LARGE-SIZE PARTS FROM FUNCTIONAL AlN CERAMIC MATRIX COMPOSITE FOR DESIGN OF WIDE-RANGE HIGH-VOLTAGE AMPLIFIER

  • Artem Dovhal National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, 37, Peremogy Avenue, Kyiv, 03056, Ukraine
  • Dmytro Chasnyk Ukrainian Research Institute of Special Equipment and Forensic Science of the Security Service of Ukraine (ISEE SSU), 3 M. Vasylenka Str., Kyiv, 03113, Ukraine https://orcid.org/0000-0002-3608-3122
  • Igor Fesenko Bakul Institute for superhard materials NAS of Ukraine http://orcid.org/0000-0001-6108-4306
  • Yulian Tuz National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, 37, Peremogy Avenue, Kyiv, 03056, Ukraine
  • Oksana Kaidash Bakul Institute for Superhard Materials National Academy of Sciences of Ukraine https://orcid.org/0000-0002-8879-3425
  • Volodymyr Sverdun Bakul Institute for superhard materials NAS of Ukraine
  • Tetiana Serbeniuk Bakul Institute for superhard materials NAS of Ukraine
  • Vasyl Chasnyk State Enterprise Research Institute ORION, 8 A, A. Tsedika Srt., Kyiv, 03057, Ukraine https://orcid.org/0000-0003-2057-0492
  • V. omelianenko V. N. Bakul Institute for Superhard Materials of National Academy of Sciences of Ukraine
Keywords: aluminum nitride, yttria, microstructure, thermal conductivity, amplifier.

Abstract

Influence of yttria addition on thermal conductivity of functional AlN-based ceramic matrix composite prepared by pressureless sintering was studied. Microstructural characteristics and measured values of thermal conductivity are presented. An optimal content of yttria in starting powder composition was estimated to prepare large-size parts for wide-range high-voltage amplifier.

To improve the information transmission by preserving the signal shape during the amplification process, a broadband high-voltage amplifier with minimal distortion of the pulse fronts was developed using a AlN-based ceramic composite, prepared by pressureless sintering of large-sized parts with a thermal conductivity of 160 W/(m·K).

The developed new broadband high-voltage amplifier with virtual power exceeds the parameters of the amplifier currently used in electrical engineering. Due to the use of large aluminum nitride parts, the developed new amplifier has the following characteristics: voltage up to 1 kV, frequency up to 100 kHz.

The new broadband high-voltage amplifier has minimized leakage currents due to parasitic capacitance and is characterized by minimal distortion of pulse fronts, which allows for improved information transmission by preserving the signal shape during the amplification process.

Author Biography

Oksana Kaidash, Bakul Institute for Superhard Materials National Academy of Sciences of Ukraine

The main area of ​​research is the creation of advanced (high-tech) ceramics with improved physico-mechanical, physico-chemical and functional characteristics due to the establishment of structural sintering mechanisms of refractory carbides and nitrides with heterodesmic interatomic bonds, patterns of formation of their microstructures. Specialist in powder metallurgy and has experience in working with a number of technologies: sintering, hot pressing, slip casting, hot extrusion of ceramic powders.

Leading researcher of dep. 6  ISM NANU, Dr. Sci. (Material Science), 

https://orcid.org/0000–0002–8879–3425;  SCOPUS ID:  6603071054;  h-index: 4

The degree PhD (1992). PhD thesis : "Development of corrosion-resistant cermets based on titanium nitride with increased stability in biologically active medium"  05.02.01 - Material Science 
Defence of thesis 05 December 1991 at the Special Academic Council of the Bakul Institute of Superhard Materials of the National Academy of Sciences of Ukraine (Kyiv).

Dr. Sci. (2019): “Scientific fundamentals of formation of structure and properties during sintering from submicron refractory carbides and nitrides of advanced ceramics for the mechanical engineering” 05.02.01 - Material Science. Defence of thesis 22 November 2018 at the Special Academic Council of the Bakul Institute of Superhard Materials of the National Academy of Sciences of Ukraine (Kyiv).

Published
2024-02-05
Issue
Vol 26 No 1 (2023): Tooling marerials science
Section
Development and implementation of equipment and tools equipped with hard alloys