Investigation of Fabrication and Microstructure of the Fe3Al/Al2O3 Composites by Hot-Pressing Process

Tao Jiang; Hai Yun Jin

doi:10.4028/www.scientific.net/MSF.695.385

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HomeMaterials Science ForumMaterials Science Forum Vol. 695Investigation of Fabrication and Microstructure of...

Investigation of Fabrication and Microstructure of the Fe₃Al/Al₂O₃ Composites by Hot-Pressing Process

Abstract:

The Fe₃Al/Al₂O₃ composites were fabricated by hot-pressing process at 1300°C for 2h under the pressure of 35MPa, by using the Fe₃Al intermetallics compounds powders fabricated by mechanical alloying and heat treatment. The phase composition and microstructure of the Fe₃Al intermetallics compounds powders and Fe₃Al/Al₂O₃composites were investigated. The XRD patterns results showed that the Fe-Al intermetallics compounds powders were prepared by mechanical alloying for 60h and heat treatment process at 800°C and 1000°C. The XRD patterns results showed that there existed Fe₃Al phase and Al₂O₃ phase in sintered composites. The Fe₃Al/Al₂O₃ composites exhibited homogenous and compact microstructure, the Fe₃Al particles were homogenously distributed in Al₂O₃ matrix. The mean particles size of Fe₃Al was about 3-4μm and the mean particles size of Al₂O₃ matrix was about 4-5μm.