APFIM investigations on quasi-binary hypoeutectic NiAl-Re alloys

被引：4

作者：

Deges, J ^{[1
]}

Schneider, A ^{[1
]}

Fischer, R ^{[1
]}

Frommeyer, G ^{[1
]}

机构：

[1] Max Planck Inst Eisenforsch GmbH, D-40237 Dusseldorf, Germany

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2003年 / 353卷 / 1-2期

关键词：

quasi-binary eutectic NiAl-Re system; atom probe field ion microscopy; particle coarsening;

D O I：

10.1016/S0921-5093(02)00671-8

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The micro- and nano-structure of a NiAl-Re alloy with 1 at.% Re has been investigated by means of atom probe field ion microscopy (APFIM) and by scanning electron microscopy. The effect of heat treatments on this alloy were studied for annealing temperatures at 1000 degreesC in a time interval of 10-1000 h, and at 1300 degreesC for 1000 h. The results were compared with those from the as-cast samples. Rhenium contents of the NiAl matrix were determined by APFIM. It was found that the Re concentration in the primary NiAl crystals decreases with increasing annealing time. Layer-resolved atom probe measurements were performed in order to determine the site occupancy of Re atoms in the NiAl superlattice. The results clearly showed a site preference for the Ni sublattice. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：80 / 86

页数：7

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