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Ceramic Porous Preforms Manufactured from Waste Materials

M. Krezmer
Archives of Metallurgy and Materials | 2022 | vol. 67 | No 1 | 283-288 | DOI: 10.24425/amm.2022.137503
Keywords composite materials ceramic preforms waste materials fly ashes
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Abstract

The goal of this study is to develop a method of manufacturing porous ceramic skeletons used as semi-finished products for reinforcement of composite materials or as filters. For manufacturing skeletons, only waste materials from coal combustion (fly ashes and bottom slags) as well as rubber granules from used tires and car parts were used. These granules were a pore-forming agent that underwent thermal degradation during sintering process. The influence of sintering temperature, portion, and type of rubber granules on the porosity of developed ceramic skeletons was determined. The study of structure of base materials and the developed ceramic skeletons in a scanning electron microscope as well as their X-ray phase analysis were made. Results will allow to predict phases that can be formed on the metal-reinforcement interface during pressure infiltration.
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Authors and Affiliations

M. Krezmer
1
ORCID: ORCID
  1. Silesian University of Technology, Faculty of Mechanical Engineering, Scientific and Didactic Laboratory of Nanotechnology and Materials Technologies , Krasińskiego Str., 44-100 Gliwice, Poland

Corona Discharge Based Meters for Manufacturing of Conducting Microwires

Aliya S. Tergeussizova Shabden A. Bakhtaev Waldemar Wójcik Bekmurza H. Aitchanov Gulzada D. Mussapirova Aynur Zh. Toygozhinova
International Journal of Electronics and Telecommunications | 2021 | vol. 67 | No 2 | 283-288 | DOI: 10.24425/ijet.2021.135977
Keywords corona discharge measuring method pulse signal measuring accuracy waiting mode
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Abstract

The wide variety of electrode shapes and their arrangement relative to each other, as well as the possibility of corona discharge in the ambient air, have created prerequisites for the development of a number of new methods and corona discharge transducers designed to measure microwire parameters and linear dimensions of various objects. The principally new noncontact control method is based on the dependence of the corona discharge current value on the diameter of the corona wire placed inside the discharge chamber. This paper provides an overview of this method.
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Bibliography

[1] Sh.A.Bahtaev, A.A.Bokanova, G.V.Bochkareva, G.K.Sydykova. Fizika i tehnika koronnorazrjadnyh priborov. Almaty 2007.
[2] Sh.A.Bahtaev, G.K.Sydykova, A.Zh. Tojgozhinova, K.Kodzhabergenova. Koronnyj razrjad na mikrojelektrodah. Almaty 2017 – 78p.
[3] Sh.A.Bakhtaev, G.V Bochkareva., G.D.Musapirova, “The pulsed current mode of the negative corona,” Vestnik Kaz NTU, no. 3, pp. 212-217, 2010.
[4] T. Abiru, F. Mitsugi, T. Ikegami, K. Ebihara, S.-ichi Aoqui, K. Nagahama, “Environmental application of electrical discharge for ozone treatment of soil,” Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska, vol. 5, no. 4, pp. 42-44, 2015, https://doi.org/10.5604 /20830157.1176573.
[5] Z. Lv, S. Rowland, S.Chen, H. Zheng, K.Wu, “Modelling of partial discharge characteristics in electrical tree channels: Estimating the PD inception and extinction voltages,” IEEE Transactions on Dielectrics and Electrical Insulation, no. 25, pp. 1999-2010, 2018. doi: 10.1109/TDEI.2018.007175.
[6] M. Szadkowski, “New method of analysis of partial discharges,” Przegląd Elektrotechniczny, vol. 90 no. 3, 103-106, 2014. doi: 10.12915/pe.2014.03.21
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[8] Sh.A.Bahtaev, G.D. Musapirova et al., “Ustrojstvo dlja izmerenija diametra mikroprovoloki,” Republic of Kazakhstan Patent no. 96543, Ofic.bjull., Prom.sobstv., no. 2, 30.01.2017.
[9] Predpatent RK №12038.Sposob izmerenija skorosti protjazhki mikroprovoloki // Bahtaev Sh.A. i dr.Opubl. Bjull.№9, 16.09.2002.
[10] G.V.Bochkareva, G.D.Musapirova, “The frequency characteristics of the differential conductivity of the corona in the high-frequency region,” in proc. The main problems of modern science: international materials. scientific-practical conf. - Bulgaria, pp. 92-94, 2010.
[11] Sh.A.Bakhtaev, G.V.Bochkareva, G.D. Musapirova, “Areas of existence of anomalies in the high-frequency conductivity of the positive corona,” Tomsk State University Journal. AIPP no. 2, pp. 18-23, 2010.

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Authors and Affiliations

Aliya S. Tergeussizova
1
Shabden A. Bakhtaev
2
Waldemar Wójcik
3
Bekmurza H. Aitchanov
4
Gulzada D. Mussapirova
2
Aynur Zh. Toygozhinova
5
  1. Kazakh National University named after al-Farabi, Almaty, Kazakhstan
  2. Almaty University of Power Engineering and Telecommunications, Almaty, Kazakhstan
  3. Lublin University of Technology, Lublin
  4. Suleyman Demirel University, Almaty, Kazakhstan
  5. Kazakh Academy of Transport and Communications named after M.Tynyshpayev, Almaty, Kazakhstan

Green spaces as strategy for urban regeneration and development – examples from Bratislava

Katarína Kristiánová Ľubica Vitková
Teka Komisji Urbanistyki i Architektury Oddziału Polskiej Akademii Nauk w Krakowie | 2016 | vol. XLIV | 283-288
Keywords green space urban regeneration urban development strategies
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Abstract

The small scale green areas, urban parks, urban forests or natural green areas are vital components of the urban structure of cities. This paper, using examples from Bratislava, analyzes the successful and lost opportunities to apply the concept of green space as a strategy for urban regeneration and development, and discusses the ways to incorporate this concept in the teaching and educational practices in the fields of urbanism and landscape architecture.

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Authors and Affiliations

Katarína Kristiánová
Ľubica Vitková

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