Effect of adding nanosize Zr[O.sub.2] and compaction processing parameters on properties of composites based on [Al.sub.2][O.sub.3] and Zr[O.sub.2]

• Published in: Refractories and industrial ceramics Vol. 54; no. 5; p. 392
• Main Authors: Zadorozhnaya, O. Yu, Tiunova, O.V, Bogaev, A.A, Khabas, T.A, Nepochatov, Yu. K, Shkodkin, A.V
• Format: Journal Article
• Language: English
• Published: Springer 01.01.2014
• Subjects: Aluminum oxide; Ceramic materials; Ceramics; Composite materials industry; Powders; Zirconium; Zirconium oxide
• ISSN: 1083-4877; 1573-9139

The effect of dry axial compaction process parameters on physicomechanical properties of ceramic composite material ZTA ([Al.sub.2][O.sub.3]--Zr[O.sub.2], Zr[O.sub.2] > 20 wt.%) with a different content of nanosize Zr[O.sub.2] powder (range 0-4 wt.%) is studied. The dependence of compact density is determined, and also the main physicomechanical properties of sintered specimens on compaction conditions, and linear specimen shrinkage on compaction pressure in the pressing direction and radial direction. It is revealed that an increase in the amount of nanosize Zr[O.sub.2] in an original charge facilitates an increase in compact and sintered specimen density, and a reduction in specimen linear shrinkage during firing. Comparative evaluation is carried out under industrial production conditions for wear resistance of ceramic specimens based on [Al.sub.2][O.sub.3] and Zr[O.sub.2] with a different Zr[O.sub.2] content, and also addition of nanosize Zr[O.sub.2]. Keywords: composites based on aluminum oxide and zirconium dioxide, suspension, press-powder, compaction force, pressing pressure, compact and sintered specimen properties.