Paper Title:
Effect of Nano-Al2O3 on Mechanical Properties and Microstructure of Al2O3/Si3N4 Compound Ceramics
  Abstract

The specimens of Al2O3/Si3N4 compound ceramics which contain 3%, 6%, 9%, 12%, 15%, and 18% nano-Al2O3 additions respectively were obtained by pressureless sintering at 1650 in the nitrogen atmosphere. The bending strength and fracture toughness (KIC) were detected. The microstructure and phase composition of the specimens were analyzed by the means of SEM and X-ray. The results show that Al2O3/Si3N4 compound ceramics can be made only using pressureless sintering. With 9-12% nano-Al2O3addition, the specimens have the top mechanical properties. The bending strength reach 710.86MPa, KIC reach 8.61MPa•M1/2. These excellent properties come from many interwoven nitride distributed uniformly in the Al2O3/Si3N4 compound ceramics matrix, which composed of big and firmly plate-like β- Si3N4, hexagonal Sialon and sheet Si2N2O.

  Info
Periodical
Advanced Materials Research (Volumes 168-170)
Edited by
Lijuan Li
Pages
1846-1849
DOI
10.4028/www.scientific.net/AMR.168-170.1846
Citation
S. M. Hao, H. F. Wang, "Effect of Nano-Al2O3 on Mechanical Properties and Microstructure of Al2O3/Si3N4 Compound Ceramics", Advanced Materials Research, Vols. 168-170, pp. 1846-1849, 2011
Online since
December 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: Eniko Volceanov, Ştefania Motoc, Adrian Volceanov, Rodica M. Neagu, Cristian Coman
2283
Authors: Oleg Vasylkiv, Yoshio Sakka, Valeriy Skorokhod
Abstract:The 0.75 to 3 mol% Y2O3-stabilized tetragonal ZrO2 and Al2O3/Y-TZP nano-composite ceramics with 0.2 to 0.7 wt% of alumina were produced by a...
615
Authors: Isabel M. Martins, Claudino Xavier, Maria Helena Mendonça, Manuela Oliveira
Abstract:Previous studies had shown that a promising material could be obtained by mixing aluminium-rich sludge with slate powder (with Al2O3:SiO2...
1695
Authors: Jie Liu, Long Quan Shao, Yuan Fu Yi, Bin Deng, Wei Wei Zhang, Li Min Dong, Hong Chen Liu, Jie Mo Tian, Ning Wen
Abstract:Objective: To study the effects of presintering temperature and temperature rise speed on the physical and mechanical properties of...
549
Authors: Bao Yu Du, Bo Zhao, Tie Lin Duan
Chapter 6: Mechanical Design and Manufacture Technology (2)
Abstract:Physical and mechanical properties as well as microstructure of zirconia toughened alumina ceramics with different zirconia content were...
485