The influence of the mass content of Al 2 O 3 on the stability of the phase composition and the strength of the ceramics of the Al 2 O 3 -3Y system has been determined. -ZrO 2 prepared according to industrial technology. It is shown that the introduction of aluminum oxide has a positive effect on the stability of the tetragonal phase of zirconium dioxide under conditions of accelerated aging. At the same time, an increase in the mass content of aluminum oxide from 15 to 80 & # 37; does not lead to a further significant change in the t-ZrO 2 / m-ZrO 2 ratio. It was found that after 5 hours aging, all materials containing alumina exhibit an increase in strength.
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