The paper examines the consolidation of 95 mole% ZrO 2 -2 mole% CeO 2 -3 mole% Y 2 O 3 nanocrystalline powder in cold uniaxial cold isostatic pressing (60 and 120 MPa), and sintering. Five starting powders are produced by processing a suspension after hydrothermal decomposition in different conditions. It is established that a homogeneous microstructure forms only in a material from the powder subjected to two homogenizing grindings. After cold uniaxial pressing and cold isostatic pressing, the sintered samples reach a relative density of 0.96 to 0.94. The bending strength is 600 to 660 MPa. The efficient consolidation of ceramics requires comprehensive processing of starting nanocrystalline powders to modify their morphology.In order to produce ZrO 2 -based bioimplants, materials with a stable structure and high bending strength and critical fracture toughness are needed [1,2]. It is believed that ZrO 2 -based materials, ZrO 2 -Y 2 O 3 system, possess excellent mechanical properties but are susceptible to low-temperature aging in humid environment. Therefore, they have limited application in developing new types of bioimplants [1, 3]. These materials become more resistant to lowtemperature aging if Y 2 O 3 is partly replaced by CeO 2 [4,5]. Transformation hardening is the main contributor to the desired properties. The main requirement in producing transformation-hardened ceramics is to form a porousless fine structure consisting of tetragonal zirconia grains (T-ZrO 2 ), which can transform into another phase under applied stress [6].Nanocrystalline ZrO 2 -based powders used as starting materials for bioimplants cause problems associated with the size effect and in-service microstructural stability. As structural components become smaller, the number of interfaces, whose properties may differ from those in larger-grained ceramics, increases [7,8].The objective of this paper is to establish features peculiar to the consolidation of nanocrystalline 95 ZrO 2 -2 CeO 2 -3 Y 2 O 3 powder * 95 ZrO 2 -2 CeO 2 -3 Y 2 O 3 depending on processing conditions. * The powder composition is in mole%.
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