【摘要】 采用蒸发凝聚法制备了Al-M(M=Cu,Fe,Cr,Mn)合金纳米粉末,研究了粉末中的相生成规律.实验结果表明,纳米粉末的相组成及其相对含量主要是由母合金的成分决定的.在Al-Cu合金纳米粉末中生成的合金相有-θCuAl2,γ2-Al4Cu9,-βAlCu3,Cu在Al中的最大固溶度明显高于Al-Cu平衡相图上的值.在Al-Fe合金纳米粉末中生成了Al13Fe4和FeAl2相.在Al-Mn和Al-Cr合金纳米粉末中则分别生成了-βMnAl6,η2-Al8Mn5相和Al13Cr2,Cr9Al17相.纳米颗粒的组织和形貌与纯金属纳米粒子的差异很大.讨论了合金纳米粒子的形成机理.更多还原

【Abstract】 Nanometer powders of Al-Me（Me=Cu,Fe,Cr,Mn） binary alloys were prepared by gas evaporation processing.The formation regularities of the phases in the as-prepared nanometer powders were investigated.Experiment results showed that for Al-Cu alloy powders,only θ-CuAl₂,γ₂-Al₄Cu₉,β-AlCu₃ alloy phases occurred and for Al-Fe alloy powders,Al₁₃Fe₄ and FeAl₂ phases formed.When the Al-Mn and Al-Cr master alloys were evaporated,β-MnAl₆,η₂-Al₈Mn₅ phases and Al₁₃Cr₂,Cr₉Al₁₇ phases formed in the as-prepared powders respectively.The microstructures and the morphology of the alloy nanometer particles were different from those of the elemental metal particles.The formation mechanism of the alloy particles was discussed.更多还原