Investigation of Al–Pb nanocomposites synthesized by nonequilibrium processes
作者： H. W. Sheng , F. Zhou , Z. Q .Hu , K. Lu
关键词: Indentation hardness 、 Materials science 、 Microstructure 、 Matrix (chemical analysis) 、 Nanocomposite 、 Metallurgy 、 Nanoparticle 、 Particle size 、 Non-equilibrium thermodynamics 、 Analytical chemistry 、 Nanometre
摘要: Two nonequilibrium processes (melt-spinning and ball-milling) were successfully employed to synthesize Al1-xPbx (x = 5, 10, 20, 30 wt. %) nanocomposites with distinct microstructures. In the melt-spun (MS) Al-Pb alloys, nanometer-sized Pb particles are uniformly distributed in micrometer-grained Al matrix have an orientational relationship matrix, while ball-milled (BM) samples, bath components refined prolonged milling time, forming homogeneously dispersed into matrix. The minimum particle size of milled samples linearly increases content. microhardness BM is much larger than that MS which mainly results from strengthening effects nanometer scale grains following Hall-Fetch relationship. for both varies content, maximum hardness exists when content about 5 %, indicating small amounts Pb, form nanoparticles, may strengthen
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