Calculation of the thermoplastic beryllium oxide slurry  molding with ultrasonic activation

U.K. Zhapbasbayev; G.I. Ramazanova; V.I. Terekhov; Z.К. Sattinova

doi:10.31643/2024/6445.41

Authors

U.K. Zhapbasbayev Satbayev University
G.I. Ramazanova Satbayev University
V.I. Terekhov Kutateladze Institute of Thermophysics
Z.К. Sattinova L.N.Gumilyov Eurasian National University

DOI:

https://doi.org/10.31643/2024/6445.41

Keywords:

thermoplastic slurry, formation, shrinkage, casting properties, beryllium oxide, ultrasonic treatment.

Abstract

The article presents the results of assessing thermal shrinkage during the formation of beryllium oxide ceramics using the hot casting method. The thermoplastic slurry is a composite system with a dispersion medium (binder) that has a very low thermal conductivity compared to the dispersed phase (beryllium oxide). Ultrasonic treatment reduces the viscosity of the slurry and improves its casting properties. The formation of beryllium oxide slurry is carried out without disrupting the integrity of the system and depends on the casting speed and temperature factors. The combined influence of these factors determines the casting properties of the slurry. Cooling - solidification of the slurry in the casting mold occurs in stages in the liquid, amorphous states with a phase transition, and in the viscoplastic state of the casting. The cooling rate of the casting at all stages depends on the cavity design, the rheological properties of the slurry, and the casting process parameters. It is important to maintain the integrity of the casting due to temperature shrinkage.

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Author Biographies

U.K. Zhapbasbayev, Satbayev University

Doctor of Technical Sciences, Professor, Head of the Research and Production Laboratory "Modeling in Energy", Satbayev University, 22 Satpaev Street, 050013 Almaty, Kazakhstan.

G.I. Ramazanova, Satbayev University

Candidate of physical and mathematical sciences, Leading Researcher. Research and Production Laboratory “Modeling in Energy”, Satbayev University, 22 Satbayev str., 050013 Almaty, Kazakhstan.

V.I. Terekhov, Kutateladze Institute of Thermophysics

Doctor of Technical Sciences, Professor, Chief Researcher of the Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences, 1 Academician Lavrentiev av., 630090 Novosibirsk, Russia.

Z.К. Sattinova, L.N.Gumilyov Eurasian National University

Candidate of physical and mathematical sciences, Associated Professor, L.N. Gumilev Eurasian National University, 2 Satpayev str., 010008 Astana, Kazakhstan.

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