A PROCESS FOR PRODUCING ALUMINA-YTTRIA-TETRAGONAL ZIRCONIA POLYCRYSTALS (A12O3-Y-TZP) SINTERED CERAMIC COMPOSITES

A PROCESS FOR PRODUCING ALUMINA-YTTRIA-TETRAGONAL ZIRCONIA POLYCRYSTALS (A12O3-Y-TZP) SINTERED CERAMIC COMPOSITES

THIS INVENTION RELATES TO A PROCESS FOR PRODUCING ALIMINA -YTTRIA-TETRAGONAL ZIRCONIA POLYCRYSTALS (A12O3-Y-TZP) SINTERED CERAMIC COMPOSITES HAVING A HOMOGENEOUS COMPOSITE STRUCTURE RESULTING IN SUFFICIENTLY HIGH MECHANICAL STRENGTH AS WELL AS HIGH HARDNESS ARE MADE BY PREPARING A SLIP COMPRISING A...

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Hauptverfasser: WAN ZAHARAH WAN MOHAMAD, RAMESH SINGH A/L KULDIP SINGH, TENG WAN DUNG, SIAH LAY FOONG
Format: Patent
Sprache:eng
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Zusammenfassung:THIS INVENTION RELATES TO A PROCESS FOR PRODUCING ALIMINA -YTTRIA-TETRAGONAL ZIRCONIA POLYCRYSTALS (A12O3-Y-TZP) SINTERED CERAMIC COMPOSITES HAVING A HOMOGENEOUS COMPOSITE STRUCTURE RESULTING IN SUFFICIENTLY HIGH MECHANICAL STRENGTH AS WELL AS HIGH HARDNESS ARE MADE BY PREPARING A SLIP COMPRISING A MIXTURE COVERING THE WHOLE RANGE OF VARYING PROPORTIONS OF ALUMINA AND MOLYTTRIA STABILISED ZIRCONIA POWDERS, WATER AND DISPERSANT, ALL ADDED IN APPROPRIATE AMOUNTS, SOLID CASTING, DRYING AND SUBJECTING THE RESULTING SOLID MASS TO SINTERING AT TEMPERATURE OF FROM ABOUT 1450°C TO 1600°C, PREFERABLE AT ABOUT 1500°C- 1550°C.