Preparation of an ultrafine-grained Fe-40Al intermetallic compound

金属学报(英文版), 2010, 23(1): 50-56.

^1, , ^2, , ^3, , ^4,

1.State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China;Graduate University of Chinese Academy of Sciences,Beijing 100039,China

2.State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China

3.State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China

4.State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China

基金项目: 科技部科研项目(2007CB607601) the National Natural Science Foundaion of China(50801064)

Preparation of an ultrafine-grained Fe-40Al intermetallic compound

Jiqiang MA ^1, , Jun YANG ^2, , Qinling BI ^3, , Weimin LIU ^4,

2.State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China

3.State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China

4.State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China

Keywords： Iron aluminides

An ultraline grained Fe-40Al intermetallic compound is fabricated by a selfpropagating high temperature synthesis (SHS) casting. The XRD result shows that the Fe-40A1 intermetallic compound consists of the B2 FeAl phase. The Fe-40Al intermetallic compound presents ultrafine grain size in the range of 100-600 nm, leading from the high nucleation rate and the low growth rate. The Fe-40Al intermetallic compound exhibits high hardness (3.4 GPa) and high bending strength (830 MPa) and high compressive strength (2700 MPa), which originate from the ultrafine-structure in the material. The effect of the load on dry-sliding wear rate of the material against AISI52100 steel was investigated. The wear rate increases with the increase of normal load. The dominated wear mechanism is microfracture.

参考文献

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Preparation of an ultrafine-grained Fe-40Al intermetallic compound

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