Paper Title:
Microstructure and Mechanical Property of Zirconia Nanocomposites
  Abstract

ZrO2 nanocomposites were prepared and studied by microstructure observation and mechanical property detection. First, yttria stabilized zirconia (3Y-TZP) nanopowders were synthesized by sol-gel method. TEM photograph showed that the addition of yttria restrained the growth of the grain, but caused the agglomeration of the nanopowder. XRD analysis showed that the amount of yttria influenced the phase character of the materials, and the monoclinic zirconia changed gradually into tetragonal and cubic phase with increasing yttria content. Second, the micro-size 3Y-TZP materials was mixed with the former prepared nano-size particles and pressed by cold isostatic pressing, and then sintered at 1300 °C to prepare ZrO2 ceramic nanocomposites. The results of microstructure analysis showed that the amount of nano-size powder affected the fracture mode of nanocomposites, thus changed the fracture toughness. The mechanical testing results indicated that both the flexural strength and the hardness decreased with increasing nano-size powder, whereas fracture toughness increased and decreased subsequently. ZrO2 ceramic nanocomposites with 20% nano-size powder would be a promising kind of dental restoration material due to its low hardness, high fracture toughness and moderate flexural strength.

  Info
Periodical
Key Engineering Materials (Volumes 434-435)
Edited by
Wei Pan and Jianghong Gong
Pages
594-596
DOI
10.4028/www.scientific.net/KEM.434-435.594
Citation
W. X. Li, D. Z. Yu, F. P. Wang, "Microstructure and Mechanical Property of Zirconia Nanocomposites", Key Engineering Materials, Vols. 434-435, pp. 594-596, 2010
Online since
March 2010
Export
Price
$32.00
Share

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

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

Authors: Dong Lin Zhao, Ren Hai Qiao, Cheng Zhong Wang, Zeng Min Shen
Abstract:The carbon nanotubes (CNTs) were prepared by catalytic decompose of benzene using floating transition method at 1100-1200°C. Benzene was...
517
Authors: Hua Zhang Zhai, Hong Nian Cai, Xiao Zhan Yang, Jian Bao Li, Gang Feng Guo, Chuan Bao Cao
Abstract:A series of BN-SiO2 composite ceramics with high relative densities have been fabricated by hot pressing of a mixture of hexagonal boron...
1426
Authors: You Jun Lu, Hong Fang Shen, Yan Ming Wang
Composites
Abstract:High-temperature mechanical properties, machinability, oxidation resistance and thermal shock resistance of different content of carbon...
276
Authors: Xin Yan Yue, Jian Jun Wang, Qi Sun, Hong Qiang Ru
Chapter 2: Engineering Ceramics and Ceramic Composites
Abstract:SiC-TiB2 composite was prepared at 2298 K by using pressureless sintering. The microstructures and mechanical properties of the SiC-TiB2...
812
Authors: Hai Jiang, Chun Yan Tian
Chapter 2: Micro/Nano Materials and Equipments
Abstract:Silicon nitride nanoceramics were fabricated by hot press sintering two kinds of Si3N4 nano-sized powders. The effect...
239