2005/07/14 by T. P. Yadav, Thakur Prasad Yadav, N. K. Mukhopadhyay +7
Engineering · Materials Science · Physics and Astronomy · #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Metallic Glasses and Amorphous Alloys #Microstructure and mechanical properties #Quasicrystal Structures and Properties #cond-mat.mtrl-sci
paper · pdf · doi:10.48550/arxiv.cond-mat/0507343
8 pages, 5 figures
arxiv created 2005/07/14 · openalex publication_date 2005/07/14 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
This work reports the formation of nano- crystalline Al50Cu28Fe22 by high-energy milling. For obtaining the nano-crystalline material, the Al50Cu28Fe22 alloy synthesized through slow cooling of the molten alloy was subjected to ball milling, which was carried out in attritor mill at 400 rpm for 5 h, 10 h, 20 h, 40 h and 80 h with a ball to powder ratio 40 : 1 in hexane medium. The x-ray diffraction observation of ball-milled samples revealed that the milling duration of 5h to 40 hrs has led to the formation of nano-phase. The average crystallite size comprising the nano-phase has been found to be ∼ 17 nm. When the nano-crystalline alloy, Al50Cu28Fe22 was vacuum annealed at a temperature of 5000C for 5 to 20 hrs, new structural phases representing superstructures of the parent nano-crystalline phase were found . The superstructure have been found to correspond to simple cubic with a = √ 2ap and face central cubic with a = 2ap (ap = lattce parameter of parent nano-crystalline alloy). It has been proposed that the formation of different type of superstructure resulting due to different duration of ball milling followed by annealing is possibly governed by minimization of free energy of the disordered B2 phase.