کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1643872 | 1517258 | 2014 | 4 صفحه PDF | دانلود رایگان |
• Ultra-high pressure (UHP) can disrupt oxide films on powder surfaces.
• Micrometric grained (MMG) Al can be synthesized via UHP consolidation of Al powders.
• MMG Al synthesized via UHP consolidation exhibits high strength and ductility.
This paper reports a study on the synthesis of a fully dense micrometric grained (i.e., grain size around 1 μm) Al via consolidation of spherical micrometric-sized Al powders under a quasi-hydrostatic ultra-high pressure of 5 GPa. Our result shows that during consolidation oxide films on powder surfaces can be effectively disrupted into nano-scale oxide particles, which promoted the formation of metallurgical bonding between powders and the retention of micrometric-sized grains. Consequently, the as-consolidated Al is characterized by micrometric grains (average grain size of 1.2 μm) with a high density of nanoscale oxide particles (average size of ~25 nm) at grain boundaries. The as-consolidated Al exhibits both high strength (ultimate tensile strength of ~130 MPa) and ductility (uniform elongation of ~10%).
Journal: Materials Letters - Volume 130, 1 September 2014, Pages 299–302