Title

Making nanostructured ceramics from micrometer-sized powders via grain refinement during SPS sintering

Authors

Authors

K. Chen; X. W. Zhang; H. Wang; L. G. Zhang; J. Zhu; F. Q. Yang;L. N. An

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

J. Am. Ceram. Soc.

Keywords

NANOCRYSTALLINE MATERIALS; PRESSURE; ALUMINA; GROWTH; Materials Science, Ceramics

Abstract

In this paper, we have demonstrated that dense bulk nanostructured ceramics can be synthesized from micrometer-sized powders by using an electrical field-activated sintering process. A dense Pb(Mg1/3Nb2/3)O-3-PbTiO3 ceramic with grain sizes of 20-100 nm was obtained from the starting powder of 1 to 10 mu m. Structural and property analysis confirmed that the entire specimen is composed of nano-sized grains. The significant microstructural refining is attributed to a pulsed electric field-induced thermo-mechanical fatigue process, which in situ "shattered" the large particles into nano-sized grains during sintering. An advantage of this technique over the previous ones is that it avoids the usage of ultrafine nanometer-sized powders, which are difficult to process and mass produce in an economic and consistent way. In principle, the process demonstrated here can be applied to other material systems.

Journal Title

Journal of the American Ceramic Society

Volume

91

Issue/Number

8

Publication Date

1-1-2008

Document Type

Article

Language

English

First Page

2475

Last Page

2480

WOS Identifier

WOS:000258379300005

ISSN

0002-7820

Share

COinS