Fabrication and High Temperature Creep Behaviour of Interpenetrated Nickel-Chromium/Alumina Composites

被引：0
|
作者：
Haeger, Andreas [1 ]
Schell, Karl G. [2 ]
Nagel, Alwin [1 ]
Bucharsky, Ethel C. [2 ]
Oberacker, Rainer [2 ]
Hoffmann, Michael J. [2 ]
机构：
[1] Aalen Univ, Mat Res Inst, D-73430 Aalen, Germany
[2] Karlsruhe Inst Technol, Inst Appl Mat Ceram Mech Engn, D-76131 Karlsruhe, Germany
来源：
ADVANCED ENGINEERING MATERIALS | 2012年 / 14卷 / 09期
关键词：
MATRIX COMPOSITES; MODULUS;
D O I：
10.1002/adem.201200055
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A method to manufacture unique interpenetrating 50?vol% nickelchromium/alumina composites, namely NiCr8020/Al2O3/50pp, is reported. Key process is a high temperature squeeze casting procedure at temperatures above 1500?degrees C used to infiltrate alloy NiCr8020 into porous alumina preforms exhibiting a bimodal pore structure. Microstructure and mechanical properties of this new composite material are presented. Bending creep tests at 1000 and 1150?degrees C are performed. The obtained results are discussed in comparison to a nickel based superalloy. It is shown, that particle preform reinforcement is a promising method to improve creep resistance of nickel based alloys significantly. Due to its outstanding creep resistance, the composite material has a high potential for structural and tribological applications at high temperatures in oxidizing atmospheres.
引用
收藏
页码：795 / 801
页数：7
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