Effects of TiO{sub 2} on the microstructure and mechanical properties of Al{sub 2}O{sub 3}/ZrO{sub 2} composites

Journal Article · Sat Jun 01 04:00:00 EDT 1996 · Journal of Materials Research

DOI:https://doi.org/10.1557/JMR.1996.0193· OSTI ID:285872

Hwang, C; Chang, Y ^[1]

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1. Department of Materials Science and Engineering, National Cheng-Kung University, Tainan, Taiwan, Republic of (China)

The microstructure and mechanical properties of hot-pressed zirconia-toughened alumina (ZTA), fabricated from the ZTA powders containing (Zr, Ti)O{sub 2} in Ar gas were investigated. In hot-pressed ZTA, the presence of Ti concentration in the grains of Al{sub 2}O{sub 3} or (Zr, Ti)O{sub 2} was analyzed by the energy dispersive spectroscopy (EDS) attached to the analytical electron miscroscope (AEM) apparatus. Experimental results showed that some Ti ions diffused to the grain boundary and into the Al{sub 2}O{sub 3} grains, thereby enhancing the densification of hot-pressed ZTA. It was possible to retain tetragonal ZrO{sub 2} at room temperature in the ZTA specimens containing {ge}5.5 mol{percent} TiO{sub 2} and hot pressed at 1350{degree}C for 1 h. The bending strength and toughness of hot-pressed ZTA were enhanced by the addition of TiO{sub 2}. {copyright} {ital 1996 Materials Research Society.}

• OSTI ID: 285872
• Journal Information: Journal of Materials Research, Journal Name: Journal of Materials Research Journal Issue: 6 Vol. 11; ISSN JMREEE; ISSN 0884-2914
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
CERAMICS
COMPOSITE MATERIALS
HOT PRESSING
MECHANICAL PROPERTIES
MICROSTRUCTURE
TITANIUM OXIDES
ZIRCONIUM OXIDES