【摘要】 F eA l金属间化合物在高温结构材料领域有广阔的应用前景。该文采用机械球磨与热处理工艺制备适于注射成形的F eA l金属间化合物粉末,利用X射线衍射仪和扫描电子显微镜研究了球磨和热处理过程中F e-A l(xA l=48%)粉末的物相结构和粉末形貌的变化规律。结果表明,F e-A l混合粉末经12 h球磨,可制得粒径为30μm左右的近球形F e(A l)和A l(F e)固溶体粉末;经进一步真空热处理后,粉末物相转变为以F eA l(B2)为主的金属间化合物。更多还原

【Abstract】 FeAl intermetallics are excellent candidates for high temperature structural materials.A FeAl（B₂） intermetallic powder that can be used for injection molding was prepared by ball milling and heat treatment.The microstructural and morphological characteristics of the Fe-Al(x_Al=48%) powder were analyzed by X-ray diffraction and a scanning electron microscope.The results show that,after being milled for 12 h,the Fe-Al powder is spherical with a mean particle size of 30 μm.After vacuum annealing,the FeAl（B₂） intermetallic phase forms and dominates in the powder microstructure.更多还原