Study of Modified Aluminous Porcelain Subjected to Mechanoacoustic Tests

• Autorzy: Ranachowski P. , Ranachowski Z. , Wieczorek K. , Jaroszewski M. , Kudela S. jr.

Identyfikatory

DOI

10.24425/amm.2018.125110

• Języki publikacji: EN

Abstrakty

EN

The paper presents the microscopic and mechanoacoustic study of degradation processes of the porcelain material C 130 type. This kind of material is used in the production of the most durable and reliable electrotechnical elements. Raw material composition of the studied porcelain was modified. This had an impact on the inner properties, cohesion and – in consequence – on operational properties of the material. Using mechanical-acoustic and microscopic methods of testing of small-size samples that were subjected to compression, it was possible to distinguish successive stages of degradation of the porcelain structure. These stages were generally typical of the porcelain materials. In the authors’ opinion, they are connected to the ageing process happening over many years of work under operating conditions. Optimization of composition and technological properties – important during technological processes – resulted in a slight decrease in inner cohesion of the porcelain. When compared to the reference material – typical domestic C 130 material, mechanical strength was somewhat lower. Carried out investigations proved that resistance of the investigated material to the ageing degradation process – during long term operation – also decreased. The improvement of technological parameters and the reduction in the number of defective elements occurred simultaneously with some decrease in the operational parameters of the material. To restore their initial high level, further work is needed to optimize the raw material composition of the porcelain.

Słowa kluczowe

EN

electrical porcelain materials; ageing processes; acoustic emission; AE; optical microscopy

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2018
• Tom: Vol. 63, iss. 4
• Strony: 1821--1826
• Opis fizyczny: Bibliogr. 8 poz., fot., rys.

Twórcy

autor

Ranachowski P.

• Institute of Fundamental Technological Research Polish Academy of Sciences, 5B Pawińskiego Str., 02-106 Warszawa, Poland

autor

Ranachowski Z.

• Institute of Fundamental Technological Research Polish Academy of Sciences, 5B Pawińskiego Str., 02-106 Warszawa, Poland

autor

Wieczorek K.

• Wrocław University of Science and Technology, Faculty of Electrical Engineering, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

autor

Jaroszewski M.

• Wrocław University of Science and Technology, Faculty of Electrical Engineering, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

autor

Kudela S. jr.

• Institute of Materials and Machine Mechanics SAS, 9 Dubravska Cesta, 845 13 Bratislava, Slovak Republic

Bibliografia

• [1] IEC Publication 672-1:1995, Ceramic and glass-insulating materials, Part 1: Definitions and classification.
• [2] IEC Publication 672-2:1999, Ceramic and glass-insulating materials, Part 2: Methods of test.
• [3] IEC Publication 672-3:1997, Ceramic and glass-insulating materials, Part 3: Specifications for individual materials.
• [4] D. W. Richerson, Modern Ceramic Engineering - Properties, Processing and Use in Design, Third Edition, Taylor and Francis, Boca Raton London New York 2006, Chapter 19.
• [5] Z. Pohl, Overhead high voltage insulation in power engineering (Napowietrzna izolacja wysokonapięciowa w elektroenergetyce), Collective work edited by Pohl Z., Printing house of Wrocław University of Technology, Chapters 4 and 6, Wrocław 2003 (in Polish).
• [6] P. Ranachowski, F. Rejmund, Z. Ranachowski, A. Pawełek, A. Piątkowski, Research of Degradation Processes of Insulator Porcelan C 130 Type, Archives of Acoustics, 33 4 (Supplement), 117-122 (2008).
• [7] P. Ranachowski, F. Rejmund, Z. Ranachowski, A. Pawełek, A. Piątkowski, S. Kudela Jr, Materials Degradation Research on the Basis of Mechanoacoustic and Microscopic Methods, Archives of Metallurgy and Materials 54 4, 1035-1043 (2009).
• [8] I. Malecki, Physical Foundations of Technical Acoustics, Pergamon Press, Oxford - Braunschweig, Chapter 3, 1969.