Paper Title:
In Situ Synthesis of Rod-Like Tielite / Alumina Ceramic Composites via Mechanical Activation
  Abstract

The purpose of this paper is to investigate the possibility of rod-like Al2TiO5 / α-Al2O3 composites in situ formation via a mechanical activation process. A QM-ISP-4 Planetary Mill was employed to activate mechanically the mixtures of anatase and corundum in air at room temperature for different times. The milled powder mixtures were pressed into platelets and then sintered in air at 1300°C for 3 h. The XRD results showed that only Al2TiO5 and α-Al2O3 phases could be detected in the sintered samples when the activated time reached 30 hours. The SEM observations illustrated the unusual microstructure of Al2TiO5 / α-Al2O3 ceramic composite materials. Abnormal grains with longitudinal length ~10 μm23 transversal length ~1 μm and equiaxed matrix grains of ~3 μm on an average were observed. EDXA proved that the rod-like grains and the fine equiaxed matrix grains were composed of Al2TiO5 and α-Al2O3, separately. The roles of anisotropic grain growth caused by mechanical activation are discussed for the in situ formation of rod-like Al2TiO5 / α-Al2O3 ceramic composite materials.

  Info
Periodical
Edited by
Katsutoshi Komeya, Yohtaro Matsuo and Takashi Goto
Pages
111-114
DOI
10.4028/www.scientific.net/KEM.352.111
Citation
X. H. Chen, X. M. Chen, H. Zhao, J. H. Wu, "In Situ Synthesis of Rod-Like Tielite / Alumina Ceramic Composites via Mechanical Activation", Key Engineering Materials, Vol. 352, pp. 111-114, 2007
Online since
August 2007
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: Maria Zaharescu, Maria Preda, Maria Crışan, Victor Fruth, S. Preda
143
Authors: Shang Yue Shen, Rui Yang, Qiang Shen, Chuan Bin Wang, Lian Meng Zhang
Abstract:Al2(1-x)MgxTi1+xO5(x=0.05-0.3) composite powder was prepared by the method of chemical coprecipitation and subsequent sintering using TiCl4,...
2347
Authors: Ze Hua Zhou, Wen Kui Li, Zhi Qin Chen
Abstract:Nanocrystalline titanium dioxide was synthesized by microwave hydrothermal (MH) using tetrabutyl titanate and normal butyl alcohol as start...
1461
Authors: M.D. Athanassopoulou, T.G. Argyropoulos, G.T. Paparoupas, J.A. Mergos, C.T. Dervos
Abstract:The utilization of Al2O3 and Li2O as dopants that promote the anatase-to-rutile (A-R) phase transition in TiO2 nanoparticles during...
918
Authors: Yun Lu, Hiroyuki Yoshida, Hiroyuki Nakayama, Liang Hao, Mitsuji Hirohashi
Abstract:In the present work, 2-step mechanical coating technique (2-step MCT), an advanced MCT, was proposed and carried out to form TiO2/Ti...
1229