The Mechanical Alloying Of Fe-Ni-Al And Fe-Ni-Ce Systems

Mechanical alloying (MA) has been widely used in synthesis and processing of new advanced materials, especially for nanocrystalline, quasicrystalline, supersaturated solid solution, intermetallic compound and amorphous materials. Alunimun based alloys attract more attentions due to its high strength at elevated temperature and corrosion resistance. The Fe-Ni-Al ternary and Fe-Ni-Ce systems were studied by mechanical alloying. The structural evolution, morphology and the thermal stability were analysed by XRD, SEM and DTA, respectively. The disordered solid solution Al(Fe,Ni) was obtained for Fe₂₅Al₆₅Ni₁₀ mixture powder. The mechanical alloying of Fe_0.25Al_0.75-xNi_x(x=0.05,0.175,0.25) mixture powders result in intermetallic compounds. The results of mechanical alloyed (FeAl)_1-xNi_x (x=0.4,0.6) and (FeAl₃)_1-xNi_x(x=0.1,0.3) mixture powders indicate that the ratio of iron and aluminum determines the formation of intermetallic compounds. The FeNi intermetallic compound, cerium oxide and one unidentified phase were obtained by mechanical alloying FeCeNi₃ and Ce(FeNi)₂ mixture powders. The magnetic properties of mechanical alloyed Fe-Al-Ni and Fe-Ni-Ce mixture powders were also investigated by VSM.