Nanocrysrtalline Powders in the A12O3-ZrO2-CeO2-Y2O3 system for high-performance ceramics

Author

Shevchenko, A.V. ; Tsukrenko, V.V. ; Dudnik, E.V. ; Ruban, A.K.

Author_Institution

Frantsevich Institute for Problems of Materials Science of NASU, Kiev, Ukraine

fYear

2012

fDate

3-7 Sept. 2012

Firstpage

79

Lastpage

80

Abstract

X-ray diffraction, BET measurements, scanning electron and optical microscopy were used to analyze the properties variation of hydrothermal nanocrystalline powder with a composition 90 wt% Al2O3-10 wt%ZrO2 (CeO2, Y2O3) after thermal treatment in the temperature range 400–1300 °C. The composition of the ZrO2-based solid solution was (mol %) 90ZrO2-8CeO2-2Y2O3. It was found that α-Al2O3 is formed at 850 °C. Phase transformation F-ZrO2⇆T-ZrO2 occurred at 1000 °C. Produced powder was sintered at 1300 °C. The present investigation demonstrates that heat treatment of composite nanocrystalline powders gives rise to complex processes. Understanding of such processes makes it possible to optimize conditions for fabrication of advanced ceramics with tailored properties.

Keywords

Aluminum oxide; Ceramics; Heat treatment; Powders; Surface treatment; Temperature distribution; α-Al2O3; Al2O3-ZrO2-CeO2-Y2O3 system; nanocrystalline powder; phase transformation; specific surface area;

fLanguage

English

Publisher

ieee

Conference_Titel

Oxide Materials for Electronic Engineering (OMEE), 2012 IEEE International Conference on

Conference_Location

Lviv, Ukraine

Print_ISBN

978-1-4673-4491-3

Type

conf

DOI

10.1109/OMEE.2012.6464791

Filename

6464791