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COMPUTER SIMULATION OF POROSITY REDUCTION OF A CERAMIC COMPOSITE BASED ON AN OXYGEN-FREE MATRIX OF SILICON CARBIDE MODIFIED WITH PARTIALLY STABILIZED ZIRCONIA

Anna Shaneva, Svetlana Lyovina, E.M. Koltsova, Nelly Popova

First published: 2020-09-20https://doi.org/10.5593/sgem2020/6.1/s24.004View metrics

Abstract

The matrix of silicon carbide (SiC) is sufficiently rigid and strong, but in order to fully realize its potential capabilities, it is necessary to reduce its fragility and increase its reliability when used under shock loading conditions, which is achieved by creating ceramic composites based on it. Zirconia (ZrO2) was chosen as a hardening additive, since it has very high resistance to crack propagation and thermal, electrical, optical, strength, and other properties. Stabilization of the cubic phase of zirconia with various impurities is used to prevent cracking during firing and increase the density of ceramic products based on ZrO2, since they do not have polymorphic transformations. The most stable are solid solutions of Y2O3 in ZrO2. This article presents experimental studies of the process of obtaining a ceramic matrix composite material based on silicon carbide, Modified by zirconia particles partially stabilized by yttrium oxide by uniaxial hot pressing. During the study, a new unique composite material was obtained with the composition SiC-ZrO2[Y2O3 (6 mol%)]. Computer simulation was carried out on the basis of the developed mathematical model for describing the sintering process by uniaxial hot pressing taking into account grain recrystallization. The dependence of increasing the maximum holding temperature and porosity of the material is established. The choice of the optimal mode for the system is presented based on the revealed dependences of the maximum holding temperature and the content of the strengthening additive ZrO2 [Y2O3]. The reported study was funded by RFBR, project number 19-37-90149.

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Publication details

Title
COMPUTER SIMULATION OF POROSITY REDUCTION OF A CERAMIC COMPOSITE BASED ON AN OXYGEN-FREE MATRIX OF SILICON CARBIDE MODIFIED WITH PARTIALLY STABILIZED ZIRCONIA
Authors
Anna Shaneva, Svetlana Lyovina, E.M. Koltsova, Nelly Popova
Proceedings
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 20th International Multidisciplinary Scientific GeoConference Proceedings SGEM 2020, Nano, Bio, Green and Space: Technologies for Sustainable Future
Publisher
STEF92 Technology
Year
2020
Pages
25-32
SWS Citekey
Shaneva2020242532
ISSN
1314-2704
ISBN
978-619-7603-12-5
Language
en
Publication type
Conference Paper
Keywords
Ceramic compositesilicon carbidezirconiahot pressingcomputer simulation
References3

  1. Thostenson E.T., Ren Z., Chou T.W. Advances in the science and technology of carbon nanotubes and their composites: a review // Composites Science and Technology. 2001. V. 61. P. 1899-1912.

  2. Masaki T. Mechanical properties of toughened ZrO2-Y2O3 ceramics //Journal of the American Ceramic Society. 1986. V. 69. №. 8. Pp. 638-640.

  3. Fedosova N. A. Development and mathematical modeling of the process of producing a ceramic matrix composite reinforced with carbon nanotubes // Moscow. 2016.

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