Journal of Materials Engineering and Performance

, Volume 26, Issue 4, pp 1856–1864 | Cite as

Analysis of Particle Distribution in Milled Al-Based Composites Reinforced by B4C Nanoparticles

Article

Abstract

In the present work, high-energy ball milling was employed to synthesize Al-(5-10 wt.%)B4C nanocomposite. To do this, two sizes of particles of 50 nm as nanoparticles (NPs) and 50 μm as coarse particles (CPs) were used. The morphology and microstructure of the milled powders were characterized using particle size analyzer, SEM, TEM and EDX techniques. It was found that milling time, B4C particles size and their content strongly affect the characteristics of powders during milling process. The breaking and cold welding of powders was recognized as two main competitive actions during the milling process that influence the microstructural evolutions. It was found that the presence of CPs led to the formation of microcracks which promote the fracture process of Al powders. The dominated mechanisms during the fabrication of composites and nanocomposites were discussed. Also, the theoretical issues regarding the changes in morphology and distribution of B4C particles in CPs and NPs are clarified.

Keywords

Al-based composites B4C nanoparticles high-energy ball milling nanoparticle distribution 

Notes

Acknowledgments

The authors would like to acknowledge Amirkabir University of Technology for supports of this research.

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Copyright information

© ASM International 2017

Authors and Affiliations

  1. 1.Mining and Metallurgical Engineering DeptartmentAmirkabir University of TechnologyTehranIran

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