Mechanical Properties of Nb2O5-Al2O3 Ceramics Prepared by Microwave Sintering

Abstract:

Article Preview

The influence of Nb2O5 on the phase and microstructure evaluation and mechanical properties of Nb2O5-Al2O3 ceramics sintered with 2.45 GHz microwave energy was investigated. The results showed that Nb2O5 could densify the pure alumina with a lower sintering temperature and a short sintering time. Nb2O5 reacted with Al2O3 to form AlNbO4 completely and the amount of AlNbO4 increased with the increasing content of Nb2O5, distributing at the Al2O3 grain boundaries. The specimen doped with 10 vol.% Nb2O5 sintered at 1500 °C exhibited plenty of columnar grains with draw ratio about 1:3. The existence of columnar grains enhanced the microhardness and fracture toughness of Nb2O5-Al2O3 ceramics.

Info:

Periodical:

Edited by:

Xiaodong Zhang, Zhijiu Ai, Prasad Yarlagadda and Yun-Hae Kim

Pages:

120-123

DOI:

10.4028/www.scientific.net/AMR.338.120

Citation:

Y. L. Ai et al., "Mechanical Properties of Nb2O5-Al2O3 Ceramics Prepared by Microwave Sintering", Advanced Materials Research, Vol. 338, pp. 120-123, 2011

Online since:

September 2011

Export:

Price:

$35.00

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

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