Fully dense Al–Pb nanocomposite bulk samples consolidated from mechanically milled powders


Powders with a nanostructured mixture of pure Al and Pb phase were produced by mechanical milling of elemental blends of Al and Pb with a composition of Al90Pb10 (wt. %). Under a pressure of 1.5 GPa at 280 °C, the as-milled powders were successfully consolidated into bulk, full-density samples (>99.5% theoretical density) while the average grain sizes of Al and Pb in the compacted samples remain unchanged with respect to those in the as-milled powders. The achievement of the full density without grain coarsening in the consolidation process could be reasonably attributed to melting of the nanometer-sized Pb particles of which the melting point is considerably depressed.

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Zhou, F., Sheng, H.W. & Lu, K. Fully dense Al–Pb nanocomposite bulk samples consolidated from mechanically milled powders. Journal of Materials Research 13, 249–252 (1998). https://doi.org/10.1557/JMR.1998.0033

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