Paper Title:
Thermal Shock Behavior of Nd-Doped α-Sialon Ceramics
  Abstract

Nd--sialons with the stoichiometric composition of Nd0.333Si10Al¬2ON15 were obtained by hot-press sintering at 1800°C for 1h. The thermal shock behavior of the Nd--sialons was examined by a water-quenching technique. The influence of the thermal shock temperature difference (T) and cycle times on the residual strength was evaluated. Equiaxed -sialon grains formed together with a small amount of intergranular phase M (Nd2Si3-xAl¬xO3+xN4-x) and -sialon phase. The residual strength after a thermal shock tended to decrease gradually with increasing T above 500°C. However, the specimens exhibited an improved residual strength (~94% of the room temperature strength) after a thermal shock of T=1100°C. The residual strength presented a gradual decrease with increasing the thermal shock cycle times at T=1100°C, and was still remained ~55% of the room temperature strength after 11-time cycle. It is contributed to the surface oxidation which may results in the healing of surface cracks and the generation of surface compressive stresses.

  Info
Periodical
Key Engineering Materials (Volumes 434-435)
Edited by
Wei Pan and Jianghong Gong
Pages
130-133
DOI
10.4028/www.scientific.net/KEM.434-435.130
Citation
C. F. Liu, F. Ye, Y. Zhou, Y. D. Huang, J. M. Zhou, "Thermal Shock Behavior of Nd-Doped α-Sialon Ceramics", Key Engineering Materials, Vols. 434-435, pp. 130-133, 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: Jian Qing Wu, Fang Li Yuan, Xin Jun Zeng, Ping Gen Rao
Abstract:A new method called cation extraction process has been applied to improve the oxidation resistance of silicon nitride ceramics with sintering...
1263
Authors: Mikinori Hotta, Junichi Hojo
Abstract:Sub-micron and nano-sized β-SiC powders were sintered with AlN and Y2O3 as sintering additives by spark plasma sintering (SPS). The sintered...
1022
Authors: Ahmet Atasoy, Ahmet Ersoy
Abstract:In this study, two different starting compositions were prepared according to two cation values, and then the mixture was compacted...
902
Authors: Bao Xia Ma, Wen Bo Han, Xing Hong Zhang
Abstract:Ternary ZrC-SiC-ZrB2 ceramic composites were prepared by hot pressing at 1900 °C for 60 min under a pressure of 30 MPa in argon. The...
173
Authors: Chun Yan Shi, Ying Kui Guo, Shu Jin Zhao, Chun Mei Song
Abstract:Al2O3 Toughened by SiC particles was hot-press sintered. Cracks of ~300μm in diameter were introduced in the surfaces of specimens, which...
109