Articles - Preparation and characterization of Y-TZP powders coated with alumina
- Chih-Cheng Chena, Hsing-I Hsiangb,* and Shu-Wei Hsub
- a Department of Mechanical Engineering, Far East College, Tainan, Taiwan, R.O.C. b Department of Resources Engineering, National Cheng Kung University, Tainan, Taiwan, R.O.C.
Abstract
In this study, alumina was coated onto yttria tetragonally stabilized zirconia (Y-TZP)core powder using aluminum nitrate with urea in an aqueous solution. Boehmite coating onto the surface of Y-TZP powders was confirmed using transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS), Fourier transform infrared (FTIR) spectroscopy and zeta potential measurements. The sintering behaviors of Y-TZP powders with and without an alumina coating were investigated using a dilatometer and scanning electron microscopy (SEM). Boehmite coating onto the surface of Y-TZP powders significantly improved the densification of the resulting ceramic bodies. The relative density of the Y-TZP with a boehmite coating sintered at 1350oC can reach 97.3%.
Keywords: Y-TZP, coating, boehmite
This Article
Copyright 2019 International Orgranization for Ceramic Processing. All rights reserved.Clean-Energy Research Institute(CRI), Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul, 04763, Korea
E-mail: jcpr@hanyang.ac.kr