High-strength ceramic made from tetragonal zirconia with additions of alumina

Autor: V. G. Peichev, Yu. I. Komolikov, M. V. Safronov, A. A. Dabizha, S. Yu. Pliner
Rok vydání: 1987
Předmět:
Zdroj: Refractories. 28:202-205
ISSN: 1573-9139
0034-3102
Popis: The aim of this investigation was to study the possibility of preparing high-strength ceramic from tetragonal ZrO/sub 2/ containing additions of Al/sub 2/O/sub 3/ by mixing powders in water suspensions. The prepared and stabilized suspensions of powdered ..cap alpha..-Al/sub 2/O/sub 3/ and ZrO/sub 2/ with an addition of 5% Y/sub 2/O/sub 3/ were mixed in a rotating polyethylene drum. The specimens were obtained by casting in gypsum molds, and fired in air in an electric furnace at 1400-1550/sup 0/C. The measurements of the bending strength were made by the three-point technique at 20/sup 0/C according to GOST 5458-75 on ground specimens measuring 4 x 5 x 50 mm, and for the x-ray analysis they used the DRON1-UM diffractometer. The relative density of the ceramic was assessed with respect to the apparent density and the density of the monocrystals of tetragonal ZrO/sub 2/ (6.12 g/cm/sup 3/) and of corundum (3.99 g/cm/sup 3/); the open porosity was determined according to GOST 2409-67. The results are shown.
Databáze: OpenAIRE
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