高能球磨制备Al-Pb纳米相复合结构合金中纳米相Pb体积分数对其长大行为影响（英文）  

Effect of Volume Fraction on the Coarsening of Pb Nanophase in Al-Pb Nanocomposite Alloys Prepared by High Energy Ball Milling

作　　者：吴志方[1] 吴江[1] 张磊[1] 吴润[1] 常庆明[1] Wu Zhifang;Wu Jiang;Zhang Lei;Wu Run;Chang Qingming(The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China)

机构地区：[1]武汉科技大学省部共建耐火材料与冶金国家重点实验室

出　　处：《稀有金属材料与工程》2018年第7期1993-1998,共6页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(51201118);Foundation of the State Key Laboratory of Refractories and Metallurgy(2016QN11);KLGHEI(KLB11003)

摘　　要：利用X射线衍射仪、扫描电子显微镜和透射电子显微镜研究了高能球磨制备的Al-Pb纳米相复合结构合金中纳米相Pb的体积分数对其长大行为的影响。结果表明,尽管Al-Pb纳米相复合结构中组成相的尺寸均在纳米量级,不同体积分数的纳米相Pb的长大行为均遵循三次方定律。纳米相Pb的粗化速率随其体积分数的增加而增加,增加幅度大于理论在此成分范围内的预测。纳米相Pb的粗化激活能不随合金成分而变化。纳米相Pb的粗化受溶质原子沿溶剂基体的晶界扩散所控制。The effect of volume fraction on the coarsening of Pb nanophase in Al-Pb nanocomposite alloys prepared by high energy ball milling has been studied by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The coarsening of Pb nanophase with different volume fractions in Al-Pb nanocomposite alloys follows the cubic growth law even though the size of the constituent phase is in nanometer range. The coarsening rate of Pb nanophase increases distinctly as the volume fraction increases, and the variation of coarsening rate is greater than the theoretical prediction in this composition range.The activation energy for coarsening of Pb nanophase does not vary with volume fraction. The coarsening of Pb nanophase is controlled by grain boundary diffusion for solute atoms in solvent matrix.

关 键 词：纳米相粗化体积分数 铝合金 复合结构合金 高能球磨 

分 类 号：TG146.21[一般工业技术—材料科学与工程]