Fabrication of alumina-based toughened nanocomposites

被引：15
|
作者：
Matsunaga, T [1 ]
Leela-Adisorn, U [1 ]
Kobayashi, Y [1 ]
Choi, SM [1 ]
Awaji, H [1 ]
机构：
[1] Nagoya Inst Technol, Showa Ku, Nagoya, Aichi 4668555, Japan
来源：
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN | 2005年 / 113卷 / 1313期
关键词：
nanocomposites; alumina; nickel; fracture toughness; soaking method; toughening mechanism;
D O I：
10.2109/jcersj.113.123
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Highly toughened nickel dispersed alumina-based nanocomposites were fabricated using our developed soaking method, based on our previously proposed toughening mechanism of nanocomposites. Commercially available gamma-alumina agglomerate with high porosity was used as a starting material. Nickel nitrate solution was penetrated into the nano-pores of the gamma-alumina agglomerate using this new technique. The alumina-nickel composite powder with alpha-alumina seeds was then sintered using a pulse electric current sintering technique. To disperse dislocations generated around the nano-particles into alumina grains, the sintered materials were annealed. The results showed that the maximum fracture toughness was 7.6 MPam(1/2), which was about two times higher than that of dense alumina.
引用
收藏
页码：123 / 125
页数：3
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