Microstructure of a eutectic NiAl-Mo alloy directionally solidified using an industrial scale and a laboratory scale Bridgman furnace

被引：14

作者：

Bogner, Samuel ^{[1
]}

Hu, Lei ^{[2
]}

Hollad, Simon ^{[1
]}

Hu, Weiping ^{[2
]}

Gottstein, Guenter ^{[2
]}

Buehrig-Polaczek, Andreas ^{[1
]}

机构：

[1] Rhein Westfal TH Aachen, Foundry Inst, Aachen, Germany

[2] Rhein Westfal TH Aachen, Inst Phys & Met Phys, Aachen, Germany

来源：

INTERNATIONAL JOURNAL OF MATERIALS RESEARCH | 2012年 / 103卷 / 01期

关键词：

NiAl-9Mo; Directional solidification; Bridgman furnace; Eutectic; Solidification morphology; MECHANICAL-PROPERTIES; TEMPERATURE; TRANSITION;

D O I：

10.3139/146.110632

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The eutectic NiAl-9Mo (at.%) alloy was directionally solidified using an industrial scale Bridgman furnace and using a liquid metal cooling Bridgman furnace to produce in-situ composites of aligned Mo fibers in an NiAl matrix. In the first part of the experiment, an investment casting shell mold system, produced for NiAl alloys, was used and investigated for the NiAl-9Mo alloy in the industrial scale furnace. Due to the lower temperature gradient of similar to 2.8 K mm(-1), the microstructure of the samples was dendritic. In the second part of the experiment, samples with well aligned Mo fibers were produced in the laboratory Bridgman furnace using a temperature gradient of similar to 11 K mm(-1) and growth rates of 0.33-0.66 mm min(-1).

引用

页码：17 / 23

页数：7

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