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- W2001450111 abstract "Zirconia toughened alumina (ZTA) materials containing increasing amounts of zirconia (5–45 vol.%) and yttria (0–3 mol% zirconia) were prepared from commercial ceramic powders by different techniques of homogenization, shaping and sintering. The powder mixtures were homogenized by a chemical method (addition of dispersing agents at fixed pH), by a mechanical method (attrition milling) and by combining the two methods. The materials were formed and sintered following two ways: 1. (i) Shaping by isostatic pressing or slip casting, followed by pressureless sintering. 2. (ii) Hot uniaxial pressing. The physical, crystallographical and microstructural properties of the materials prepared following these different techniques are compared. Aluminiumoxidwerkstoffe, die mit Zirkonoxidpartikeln (5–45 Vol.%) oder Zirkonoxid-Yttriumoxidpartikeln (bis 3 mol% Yttriumoxid) verstärkt sind (ZTA), wurden ausgehend von handelsüblichen Keramikpulvern mittels unterschiedlicher Misch-Form- und Sintertechniken hergestellt. Die Pulvermischungen wurden entweder mit einem chemischen Verfahren (Zugabe eines Dispersionsmittels bei konstantem pH-Wert) oder einem mechanischen Verfahren (Attritormahlung) oder einer Kombination aus beiden Verfahren hergestellt. Die Werkstoffe wurden dann auf zwei unterschiedlichen Wegen geformt und gesintert: 1. (i) Isostatisches Pressen oder Schlickerguß und druckloses Sintern. 2. (ii) Heißpressen. Die physikalischen, kristallografischen und mikrostrukturellen Eigenschaften dieser Werkstoffe, die mit den unterschiedlichen Herstellungsverfahren produziert wurden, werden miteinander verglichen. Des alumines renforcées par des particules de zircone (ZTA) (de 5 à 45% en volume) stabilisée à l'oxyde d'yttrium ou non ont été préparées à partir de poudres commerciales par différentes techniques de mélange, de mise en forme et de frittage. Les mélanges de poudre ont été homogénéisés par une méthode chimique (addition d'agents dispersants à pH donné), une méthode mécanique (broyage par attrition) ou par une combinaison des deux méthodes. Les matériaux ont été mis en forme et frittés selon deux processus: 1. (i) Pressage isostatique ou coulage en barbotine et frittage sans pression. 2. (ii) Pressage uniaxial à chaud. Les propriétés physiques, cristallographiques et microstructurales des matériaux obtenus à l'aide des différentes techniques sont comparées." @default.
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- W2001450111 date "1992-01-01" @default.
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- W2001450111 title "Preparation and characterization of a dispersion toughened ceramic for thermomechanical uses (ZTA). Part I: Material preparation. Characterization of microstructure" @default.
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- W2001450111 doi "https://doi.org/10.1016/0955-2219(92)90002-u" @default.
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