Paper Title:
Microstructural Evolution and Mechanical Properties in Yb2O3–Fluxed Silicon Nitride Ceramics
  Abstract

Silicon nitride ceramics were fabricated with Yb2O3 as the sintering additive. The effects of the amount of Yb2O3 on the microstructure and the mechanical properties such as the flexural strength and the fracture toughness were investigated. Almost fully densified Si3N4 was obtained when only 4 wt% Yb2O3 was added. Both the flexural strength and the fracture toughness increased steadily with the Yb2O3 content. The transgranular fracture mode was observed in the specimen containing 4 wt% Yb2O3, however, the intergranular fracture mode was observed in the specimen containing 10 wt% Yb2O3.

  Info
Periodical
Key Engineering Materials (Volumes 336-338)
Edited by
Wei Pan and Jianghong Gong
Pages
1172-1174
DOI
10.4028/www.scientific.net/KEM.336-338.1172
Citation
G. F. Guo, X. Z. Yang, J. B. Li, H. Lin, L. Liang, M. S. He, X. G. Tong, "Microstructural Evolution and Mechanical Properties in Yb2O3–Fluxed Silicon Nitride Ceramics", Key Engineering Materials, Vols. 336-338, pp. 1172-1174, 2007
Online since
April 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: D. Bučevac
Abstract:The effect of seeding on the microstructure and mechanical properties of hot-pressed silicon nitride was investigated by introducing large,...
423
Authors: Yang Song, Chang An Wang, Chun Qing Peng, Yong Huang
Abstract:High-pure bulk Ti3SiC2 samples were fabricated by directly hot-pressing (HP) high-pure Ti3SiC2 powder without any additives at 1200°C to...
958
Authors: Ling Bai, Chang Chun Ge, Wei Ping Shen, Ke Zhang, X.D. Mao
Abstract:The densification and phase transformation of high α-phase silicon nitride powder synthesized by SHS with a combination of Y2O3 and Al2O3...
577
Authors: Xin Sun, Xing Hong Zhang, Zhi Wang, Wen Bo Han, Chang Qing Hong
Abstract:Abstract. ZrB2-SiC ultra-high temperature ceramics (UHTCs) was hot-pressed at a temperature of 1900°C with the addition of carbon black as a...
185
Authors: Qi Long Guo, Jun Guo Li, Qiang Shen, Lian Meng Zhang
Chapter 2: Engineering Ceramics and Ceramic Composites
Abstract:The sinterability of ZrB2-20vol.% SiC ceramics by high-energy ball milling as well as introduction of Zr and Al as sintering...
723