Sinterbility and Mechanical Properties of Zirconia Nanoparticles Prepared by Hydrothermal Process

Abstract:

Article Preview

A hydrothermal method has been used to produce nanoparticles of 3 mol% yttria-stabilized tetragonal zirconia (3Y-TZP) with high fracture toughness. The effects of reaction temperature and pH on crystallite size and sintered density, and the influence of Nb2O5 addition into 3Y-TZP on toughness have been investigated. The particle size increased with increasing the processing parameters and the influence of temperature was more significant than pH. The density of nanosized 3Y-TZP increased with increasing pH up to 9 and then decreased abruptly with further increase. The density increased slightly with the reaction temperature up to 140°C and then changed little with increasing temperature. The toughness increased in proportional to the Nb2O5 content. After sintering for 1 h at 1270°C, the highest relative density of 98% was obtained from nanoparticles of about 17 nm, prepared at 200°C and pH 9, and the toughness of 3Y-TZP was increased from 2.5 to 8.3 MPam1/2 by addition of 1.2 mol% Nb2O5.

Info:

Periodical:

Solid State Phenomena (Volumes 124-126)

Edited by:

Byung Tae Ahn, Hyeongtag Jeon, Bo Young Hur, Kibae Kim and Jong Wan Park

Pages:

1293-1296

DOI:

10.4028/www.scientific.net/SSP.124-126.1293

Citation:

S. H. Park et al., "Sinterbility and Mechanical Properties of Zirconia Nanoparticles Prepared by Hydrothermal Process", Solid State Phenomena, Vols. 124-126, pp. 1293-1296, 2007

Online since:

June 2007

Export:

Price:

$35.00

In order to see related information, you need to Login.

In order to see related information, you need to Login.