Experimental Study of Dynamic Strength of Aluminum Oxide Based Fine-Grained Ceramics Obtained by Spark Plasma Sintering
A. M. Bragov, V. N. Chuvil'deev, N. V. Melekhin, M. S. Boldin, V. V. Balandin, A. V. Nokhrin, A. A. Popov
National Research University, Nizhny Novgorod, 603950 Russia
Keywords: оксид алюминия, оксидная керамика, метод искрового плазменного спекания, баллистические испытания, твердость, трещиностойкость, alumina, oxide ceramics, spark plasma sintering, ballistic tests, hardness, crack resistance
Abstract
Spark plasma sintering and a standard free sintering method are used to manufacture ceramic plates with a diameter of 30 mm from aluminum oxide powder with a fraction size approximately equal to 3 m. Dynamic strength of the ceramics obtained is studied. Dynamic loading is carried out by a hardened steel impactor. It is shown that energy dissipation in a material obtained using spark plasma sintering is substantially larger than that in a material fabricated using free sintering, which means that it is more resistant to dynamic loads.
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