Influences of Al2O3 grain size on high-temperature oxidation of nano-Ni/Al2O3 composites

被引：15
|
作者：
Hai Vu Pham [1 ]
Maruoka, Daisuke [2 ]
Nanko, Makoto [3 ]
机构：
[1] Nagaoka Univ Technol, Grad Sch Engn, 1603-1 Kamitomioka, Nagaoka, Niigata 9402188, Japan
[2] Tohoku Univ, Dept Frontier Sci Adv Environm, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan
[3] Nagaoka Univ Technol, Dept Mech Engn, 1603-1 Kamitomioka, Nagaoka, Niigata 9402188, Japan
来源：
JOURNAL OF ASIAN CERAMIC SOCIETIES | 2016年 / 4卷 / 01期
基金：
日本科学技术振兴机构;
关键词：
Nanocomposite; High-temperature oxidation; Grain size; Al2O3; CRACK DISAPPEARANCE; DISPERSED AL2O3; STRENGTH; BEHAVIOR; RECOVERY; DIFFUSION;
D O I：
10.1016/j.jascer.2016.01.003
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：
Two 5 vol% Ni/Al2O3 composites with the difference in Al2O3 grain size were fabricated by pulsed electric current sintering technique to investigate the influence of Al2O3 grain size on oxidation behavior of the composites. Average Al2O3 grain sizes of two fabricated composites were 1.1 mu m and 0.5 tim after sintering. Oxidation tests were conducted at temperatures ranging from 1100 to 1350 degrees C for 1-48 h in air. A thin NiAAl(2)O(4) layer was observed in exposed surface of samples after oxidation. An oxidized zone that consisted of Al2O3 matrix and NiAl2O4 grains was defined. Growth of the oxidized zone obeyed the parabolic law. Influences of Al2O3 grain size on high -temperature oxidation of the composites were discussed. (C) 2016 The Ceramic Society of Japan and the Korean Ceramic Society. Production and hosting by Elsevier B.V.
引用
收藏
页码：120 / 123
页数：4
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