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《Rare Metal Materials and Engineering》 2008-09
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Microstructure and Tribological Property of Laser Melt Deposited α/Fe_9Cr_9Si_2 Metal Silicide Alloys

Yuan Yuan, Wang Huaming (Beijing University of Aeronautics and Astronautics, Beijing 100083, China)  
The ternary intermetallic compound Fe9Cr9Si2 is expected to be a promising wear and corrosion resistant material due to its inherent high hardness, covalent-dominated strong atomic bonds and high Cr and Si content. Room temperature brittleness is currently the main obstacle preventing it from industrial applications. In order to improve the ductility of Fe9Cr9Si2, the Fe-base solid solution toughened Fe9Cr9Si2 alloys were designed and fabricated by laser melting/deposition manufacturing process. Microstructure of the alloys was characterized by optical microscopy (OM), X-ray diffraction (XRD), energy dispersive spectroscopy (EDS) and Vickers microhardness measurement. Microstructure of the alloys consists of Fe9Cr9Si2 primary dendrite and the interdendritic Fe-base solid solution α. Friction coefficient of the alloys was evaluated under dry sliding friction condition. Volume fraction of Fe9Cr9Si2 primary dendrite and average hardness of the alloys increases with the increasing Cr content. Friction coefficient of the alloys decreases with the increasing of Fe9Cr9Si2 primary dendrite volume friction.
【Fund】: 国家自然基金资助项目(50331010 50625413)
【CateGory Index】: TG113
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【Co-citations】
Chinese Journal Full-text Database 1 Hits
1 Dong Lixin, Wang Huaming (Beihang University, Beijing 100083, China);Corrosion Behavior of Ti_2Ni_3Si/NiTi Intermetallic Alloys in H_2SO_4 Solution[J];Rare Metal Materials and Engineering;2009-06
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