Meso-Structure Design of B₄C-Al/Al Composites by Hot Pressing

Abstract:

According to the theory of meso-structure design, milling powders were blended with un-milled Al particulate to increase ductility. Two kinds of Al particulate-toughened composites were fabricated by using powder metallurgy method, where the mass fraction of B₄C in the B₄C-Al agglomerate particles was 40%, but 32% and 16% in the whole composite. The microstructure of composites was examined by scanning electron microscope (SEM), and its mechanical properties were studied. The results indicate that Al particulate-toughened sample has a slight plasticity with bulks of aluminum alloy in the composite. But meso-structure design has no effect on improvement on the plasticity and toughness of the sample B₄C-Al/Al (16%)(3^#), where the mass fraction of B4C in the whole composite is 16%. In the present study, the strengthening and deformation mechanism of the composites were also discussed.

• Periodical: Materials Science Forum (Volume 849)
• Pages: 801-806
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.849.801
• Online since: March 2016
• Authors: Hui Li, Yi Tan Zhang, Kei Ameyama, Hai Jun Yang, Zhi Guo Liu, Chao Li Ma
• Keywords: B₄C, Mechanical Properties, Meso-Structure Design, Powder metallurgy

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