Tensile and fracture properties of NiAl/Ni micro-laminated composites prepared by reaction synthesis

被引：7
|
作者：
Kim, Hee Y.
Chung, Dong S.
Enoki, M.
Hong, Soon H. [1 ]
机构：
[1] Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, Taejon 305701, South Korea
[2] Daegu Polytech Coll, Dept Mat, Taegu 681280, South Korea
[3] Univ Tokyo, Dept Mat Engn, Bunkyo Ku, Tokyo 1138656, Japan
来源：
JOURNAL OF MATERIALS RESEARCH | 2006年 / 21卷 / 05期
关键词：
D O I：
10.1557/JMR.2006.0154
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The mechanical properties of NiAI/Ni micro-laminated composites with highly gradient microstructure have been investigated. Two types of composites with different gradient microstructures were prepared by reaction synthesis. Intermetallics of type I and type 11 composites mainly consisted of Al-rich Ni0.45Al0.55 with variable thickness and Ni-rich Ni0.58Al0.42 with similar thickness, respectively. As intermetallic volume fraction increased, yield strength of type II followed the rule-of-mixture well, while that of type I deviated due to the composition variation of intermetallic phases. Fracture toughness of type 11 was higher than that of type I, and all showed K-R curves with upward curvature by large-scale bridging. Even though the relative strength of constituent phases in intermetallic/metal laminates was not constant due to the gradient microstructure, the fracture mode transition showed similar behavior to that of metal/ceramic laminates.
引用
收藏
页码：1141 / 1149
页数：9
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