MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Effect of Mo Addition on Phase Stability and High-Temperature Strength of NbSi2/Nb5Si3 Composites
Wei LiHaibo YangAidang ShanLanting ZhangJiansheng Wu
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2004 Volume 45 Issue 12 Pages 3282-3285

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Abstract

Directionally solidified NbSi2/Nb5Si3 in-situ composites have been prepared. Scanning Electron Microscopes (SEM) and X-ray diffraction (XRD) have been used to investigate phase constitution and microstructure. It was found that microstructure and phase stability of directionally solidified alloys depended on growth rate, heat-treatment and alloying element. Compression strength was tested in the temperature range from 1473 to 1773 K and compression axes parallel to growth direction was chosen. High-temperature strength of NbSi2/Nb5Si3 composites increased from 222.9 to 593.77 MPa at 1773 K due to Mo addition.

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© 2004 The Japan Institute of Metals and Materials
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